Is wireless charging safe?
It is very safe to contact the wireless charger closely. When your smart phone is actually in contact with the charging base, the signal will be concentrated to the receiving coil of the mobile phone, thus starting charging. Compared with the mobile phone connected to the mobile network, the radiation emitted by the entire wireless charging process is much smaller.
Will the wireless charger get hot?
During the charging process, all chargers will generate a certain amount of heat. Indoor chargers, charging bases and even portable power banks will lose a certain amount of energy in the form of heat. Wireless chargers are no exception.
Is it safe to overcharge the smartphone?
Most charging pads will use trickle mode to safely charge the mobile phone battery to ensure that the mobile phone battery is always fully charged, so it is safe to leave the mobile phone on the charging pad overnight and even longer. Trickle charging refers to: when the mobile phone is placed on the charging board, if the battery charge falls below 100%, a small amount of current will be provided to the battery to ensure that it is always fully charged.
Although your charging pad or charging base is connected to a wall outlet, the socket may be affected by lightning strikes and other electrical surges, but the wireless charger will not pass the increased voltage to your smartphone. Therefore, wireless charging is safer than using a power outlet to charge a smartphone.
What if there is a foreign material on the wireless charger?
Maybe keys or coins. These may cause the charging pad to continue to discharge, which will not only damage your device, but may also melt foreign material on the charging pad. Therefore, it is very important to find a charger equipped with a foreign object detection device. Once a foreign object is found, an alarm will sound-usually with an LED light, indicating that a foreign object other than a compatible device has touched the charger. This will help prevent charging hazards.
Wireless charging has become popular in mobile phones, and they become standard devices. There are also a lot of products in the wearable space. In the future, wireless charging will be widely used in homes, offices, public places, transportation tools and transportation. There will also be widespread use of electric cars in the future.
Application of wireless energy transmission (WPT) : smart phone, smart wear (small power)
The structure of wireless charging
It is similar to that of a transformer, which consists of a transmitter and a receiver, both of which are composed of coils and magnetic materials. There are different kinds of magnetic materials, such as ferrite, amorphous and nanocrystalline.
The role of soft magnetic shielding material in wireless charging
Magnetic shielding: provides a low impedance path for magnetic flux, reduces the magnetic field lines emitted to the outside, reduces the impact on the surrounding metal objects, and prevents eddy current and signal interference.
Magnetic resistance reduction: improve coupling coefficient, improve magneto-electric conversion efficiency, use fewer turns to achieve higher inductance coil, reduce coil resistance, reduce the efficiency reduction caused by heat (more turns, higher resistance).
Comparison of charging efficiency of nanocrystalline magnetic conducting tablets
In order to simulate the real situation and conduct comparative test under the same conditions, the charging efficiency of nanocrystalline magnetizers with different thickness and ferrites with different permeability and thickness are compared. With the increase of the thickness, the charging efficiency is improving, but the nanocrystalline is not thicker, and it is basically saturated at 0.1mm. Therefore, when designing the wireless charging module, the nanocrystalline magnetic conducting plate does not need to be too thick, which will increase the material cost. The rule of ferrite is similar to that of nanocrystalline. The higher the permeability, the higher the charging efficiency, and the thicker the thickness, the higher the charging efficiency. However, at the same charging efficiency, the thickness of nanocrystalline magnetic sheet is only half of that of ferrite.
Nanocrystalline applications for wireless charging began with S7, a material that does all the work, replacing a combination of amorphous and ferrite. It is generally believed that used in the NFC soft magnetic materials, ferrite is the best, and that nanocrystalline doesn't fit, because in high frequency, the wastage of the nanocrystalline outweigh the ferrite, but research personnel made a breakthrough, the successful application of S7 proved nanocrystals can be used in the NFC, then the S8 / N8 / A7 / J5 / J7 many models such as products, to expand the application of nanocrystalline from WPC to NFC and MST.
Mobile phone wireless charging development trend:
1,Function: the WPC - WPC + NFC - WPC/Airfule + NFC 2,Wireless charging -- wireless charging + -- charging at will 3,Power: the 5 W - 7.5 W - 10 W - 15 W 4,Slow charge -- universal charge -- quick charge -- flash charge
Application and popularization
Low power: mobile phone, smart wear, etcMedium power: computer, kitchen appliances, etcHigh power: electric vehicles, roads and other infrastructureThe future, will be the wireless world, change life, change the world.
Wireless charging technology has been repeatedly mentioned in recent years. With the further popularization of this technology, the wireless charging function in public places has also developed, but what is the wireless charging technology?
In 1890, physicist and electrical engineer Nikola Tesla had already done a wireless transmission experiment.
The fundamentals of wireless charging
Wireless charging is designed based on the principle of electromagnetic induction. The core of electromagnetic induction is to modify the transformer. The transformer is composed of a magnetic core and a coil, one is on the mobile phone, and another is on the power supply. When the two are combined, the magnetic force attracts each other to produce wireless power transmission.
Internal structure of wireless charging
Inside the transmitter has:
1. DC power input;
2. Frequency generating device;
3. Switching power;
4. Resonant combination of transmitting coil and capacitor;
Outside the receiver has:
1. Received coil and capacitor resonance combination;
3. Filter and voltage regulator;
4. DC power output;
How wireless charging works
The main types of magnetic barriers applied to wireless charging
Hard magnetic material (represented by Ferrite)The Ferrite sheet sintered at high temperature has high magnetic permeability, and the material is hard and easy to crack. It is commonly used in the transmitter end of wireless charging.
How does the magnetic material work
The magnetic material plays an important role in wireless chargingThe addition of magnetic material will increase the magnetic flux of the coil, the closed magnetic field is safer, and it will not interfere with the mobile phone signal. The main working principle is that there is a coil at the sending and receiving ends. Electromagnetic signal, the receiving coil induces the electromagnetic signal of the transmitting end to generate current to charge the battery; attaching a magnetic material to the transmitting antenna can enhance the magnetic field strength of the coil, and at the same time has a high magnetic convergence effect; placing a magnetic sheet at the receiving antenna Prevent the attenuation and interference of metal conductors on the magnetic field, play the role of metal isolation, prevent waste of energy, and improve charging efficiency.
of Nanocrystalline Soft Magnetic Materials in Wireless Charging
What is a nanocrystalline?
First of all, we have
to understand what is amorphous? During the preparation of the metal, if it is
cooled with an ultra-fast cooling rate during its solidification process, the
atoms are in a disorderly state at this time, and they will be instantly frozen
before they can be rearranged. The structure formed at this time is Amorphous. Nanocrystalline is based on the amorphous state, through
a special heat treatment, let it form crystal nuclei and grow. However, it is
necessary to control the size of the crystal grains at the nanometer level, and
do not form complete crystals. The structure formed at this time is nanocrystalline.
Compared with cobalt-based amorphous and
ferrite, nanocrystalline has a high saturation magnetic inductance and can
reduce the volume of magnetic devices. High magnetic permeability, small loss,
and small coercive force can reduce the loss of magnetic devices. Therefore,
nanocrystalline are the best soft magnetic materials in high-frequency power
3. Characteristics of nanocrystalline
The frequency of the current wireless
charging "Qi standard" is between 100-200k. At this frequency, the
magnetic permeability of the nanocrystalline is very close to that of the
cobalt-based amorphous, which is significantly higher than that of the
iron-based amorphous and ferrite . The loss is just the opposite, significantly
lower than iron-based amorphous and ferrite.
Nanocrystalline also have advantages in
temperature applications. Not only are nanocrystalline wider in application
temperature than cobalt-based amorphous and ferrite, but in the range of
-40℃-120℃, the stability of nanocrystalline is also significantly better than
Nanocrystalline also have obvious
advantages in the design of magnetic materials. Nanocrystalline can be oriented
to control permeability and anti-saturation magnetic fields. The magnetic
permeability of nanocrystalline can be adjusted freely within 1000-30000. The
design of the magnetic material requires that the magnetic saturation should
not be reached under a specific working current. Once the magnetic saturation
is reached, it will stop working. The nanocrystalline adjustable
anti-saturation magnetic field can reach 30~350A/m, making the application
range of wireless charging more width.
Application of nanocrystalline soft magnetic materials in wireless charging
Wireless charging has become popular in
mobile phones, and there are many products in the wearable field. In the
future, wireless charging will be popularized in homes, offices, public places,
travel tools, and transportation.
Wireless power transmission (WPT): The
structure of wireless charging for smart phones and smart wearables (small
power) is similar to a transformer. It consists of a transmitter and a
receiver. The transmitter and the receiver are both made of coils and magnetic
materials. The magnetic materials are different. The choices are ferrite,
amorphous, nanocrystalline, etc.
The role of soft magnetic shielding materials in wireless charging
Magnetic shielding: Provide a
low-impedance path for the magnetic flux, reduce the magnetic field lines
radiating outward, reduce the impact on the surrounding metal objects, and
prevent eddy currents and signal interference.
Permeability reduction: improve the
coupling coefficient, improve the magnetoelectric conversion efficiency, use
fewer turns to achieve a higher inductance coil, reduce the coil resistance,
and reduce the efficiency reduction caused by heating (the more turns, the
higher the resistance) .
Comparison of charging efficiency of nanocrystalline magnetic permeable sheets
Simulating real scenes, conducting
comparative tests under the same conditions, using different thickness
nanocrystalline magnetic sheets and ferrite with different permeability and
thickness to compare the charging efficiency. As the thickness increases, the
charging efficiency continues to increase, but the nanocrystalline is not as
thick as possible, basically saturated by 0.1mm, therefore, when designing a
wireless charging module, the nanocrystalline magnetic permeable sheet does not
need to be too thick, it will Increase material cost. The law of ferrite is
similar to that of nanocrystals. The higher the magnetic permeability, the
higher the charging efficiency, the thicker the thickness, and the higher the
charging efficiency. However, under the same charging efficiency, the thickness
of the nanocrystalline magnetic sheet is only the ferrite. half.
Improving laminate quality
The use of fiber reinforced polymer composites in a number of applications in energy, marine, aerospace, and automotive industries stem from their high specific stiffness and strength. However, there’s a major challenge to reduce manufacturing as well as tooling costs while minimizing structural defects, therefore, leading to a longer service life.
Wet lay-up's shortcomings in the past
Wet lay-up method has been implemented to fabricate fiber reinforced composites for strengthening of civil infrastructure, repair of aerospace structures, marine, and automotive industries. The extensive use of this method stems from minimal tooling cost, low cost of materials, and ease of application. However, there’s the shortcoming of emission of volatiles, which is a major concern of these open-mold processes. Low fiber volume fraction as well as high void content is another limitation associated with the wet lay-up method. These lead to products with low mechanical properties when compared to laminates fabricated by closed-mold methods.
Theory of the magnet assisted composite manufacture
Wet lay-up process in conjunction with vacuum bagging appears to be promising in the prevention of emission of volatiles and fabrication of better quality products if an elevated pressure can be applied to improve the consolidation. Researchers led by Professor M. Cengiz Altan at the University of Oklahoma developed the magnet assisted composite manufacturing method in a bid to improve the wet lay-up/vacuum bag process. The manufacturing approach does not necessitate complex tools for fabrication and may be implemented in the composite industries.
The actual operation as follows
They used six layers of E-glass, random fiber mats that were cut into squares as reinforcement. An epoxy resin (EPON 862) and a curing agent (EPICURE 3300) were mixed at room temperature. Then, the authors prepared the wet lay-up by applying one ply of dry fiber on the bottom steel tool plate and one coat of resin. They used a roller to squeeze the excess resin after laying each ply. The same procedure is repeated for all the plies. The composite was then covered with a caul plate, a porous release film, and a breather cloth and the entire lay-up is vacuum bagged. To apply the consolidation pressure, the authors used a set of Neodymium Iron Boron (NdFeB) permanent magnets that can generate a maximum magnetic pressure of 0.64 MPa. Nine magnets were placed on a magnetic steel plate and were used to produce a magnetic compressive pressure on top of the vacuum bag that was sandwiched between the magnets and bottom steel tool plate.
Variation of magnetic compressive pressure with air gap or lay-up thickness for an NdFeB, N52-2.54 × 2.54 × 1.27 cm3 magnet sandwiched between two steel plates.
In the study, the team fabricated 6-ply E-glass/epoxy laminates under four scenarios. In the first case, they fabricated the laminates by wet lay-up/vacuum bag method without applying an extra pressure. Therefore, the laminates were only compacted by the vacuum pressure. In the second case, M-T180 laminates were analyzed in order to understand the effectiveness of the magnet assisted composite manufacturing method and how it could enhance the typical wet lay-up/vacuum bag process. The third and fourth scenarios were considered for the assessment of the influence of applying magnetic consolidation pressure for a short period.
Application of magnetic pressure to consolidate the wet lay-up/vacuum bag composites.
Samples synthesized adopting magnet assisted composite manufacturing method exhibited approximately a 70% drop in the void volume fraction, 55% fiber volume fraction increase, and an improvement of the flexural strength as well as stiffness. Flexural strength increased by 60% to 253.5 MPa and the flexural stiffness was raised by 46% to 9.9 GPa. The authors also investigated the effect of time of applying magnetic pressure on the integrity of the products. They recorded the lowest void content when the magnetic pressure was only applied for 15 minutes while the fiber volume fraction was also increased by 22%.
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What is Heat Treatment
heat treatment is one of the important processes in mechanical manufacturing.
Compared with other processing techniques, heat treatment generally does not
change the shape and overall chemical composition of the workpiece, but changing the workpiece inside
microstructure or changing the chemical
composition on the surface of the workpiece , improve the performance of the
workpiece. Its characteristic is to improve the inherent quality of the
workpiece, which is generally not visible to the eye. In order to make the
metal workpiece have the required mechanical properties, physical properties
and chemical properties, in addition to the reasonable selection of materials
and various forming processes, heat treatment processes are often essential.
Annealing, normalizing, quenching and tempering are the four basic processes in
the overall heat treatment.
Four Basic Heat Treatment Processes
is to heat the workpiece to an appropriate temperature, use different holding
times according to the material and the size of the workpiece, and then slowly
cool down, the purpose is to make the internal structure of the metal reach or
near the equilibrium state, to obtain good process performance and performance,
or Further quenching for organizational preparation.
to heat the workpiece to a suitable temperature and cool it in the air. The
effect of normalizing is similar to annealing, except that the resulting
structure is finer. It is often used to improve the cutting performance of the
material, and sometimes it is used for low requirements parts as the final heat
to quickly cool the workpiece in the quenching medium such as water, oil or
other inorganic salts, organic aqueous solution after heating and heat
preservation. After quenching, the steel parts become hard, but at the same
time they become brittle.
to keep the quenched steel parts at an appropriate temperature higher than room
temperature and lower than 710 ℃ for a long time, and then cool them, which can
reduce the brittleness of the steel parts
magnets that can withstand temperatures of 500°C and
key devices in the aerospace and other fields, such as aircraft motors and
generators, microwave function tubes, magnetic bearings and inertial navigation
devices, require high-performance high-temperature permanent magnet
the existing permanent magnet materials, the strongest NdFeB magnet has the highest room temperature performance, but its
Curie temperature is 312 °C, and
the maximum working temperature is usually not more than 250 °C;
Curie temperature of AlNiCo magnet is 850 °C ,
The maximum operating temperature can reach 520 °C, but
the coercive force of the magnet is very low ( 145 kA / m), so it can not manufacture small and light components; SmCo magnet has a high Curie temperature (750 ~ 920 °C),
it has strong magnetocrystalline
anisotropy and high coercivity at room temperature ( 1990 kA / m), which is
the first choice for high temperature permanent magnet material.
main reason why the traditional 2:17 SmCo magnet is not suitable for high temperature applications is
that its coercive force decays rapidly with increasing temperature (coercive
force temperature coefficient β ≈-0.30% / °C). By
adjusting the alloy composition and heat treatment process of the traditional
2:17 type SmCo magnet , the microstructure and microcomposition
inside the material are controlled to reduce the temperature coefficient of the
coercive force of the material and increase the use temperature. In the end, we successfully made a 2:17 type SmCo high temperature magnet that can be applied at 500 ° C and 550 ° C.
What is powder metallurgy?
metallurgy is a technology that manufactures metal powder, and uses metal
powder (sometimes also adding a small amount of non-metallic powder) as a raw
material to produce materials or products through mixing, forming, and
sintering. It includes two parts.
Manufacturing metal powder (also including alloy powder, hereinafter
collectively referred to as "metal powder").
Using metal powder (sometimes also adding a small amount of non-metallic
powder) as a raw material, after mixing, forming and sintering, manufacturing
materials (called "powder metallurgy materials") or products (called
"powder metallurgy products").
The prominent advantages of powder metallurgy.
Able to manufacture materials and products that cannot be manufactured or are
difficult to manufacture using other processes, such as porous, sweating, shock
absorption, sound insulation and other materials and products, refractory metal
materials and products such as tungsten, molybdenum, titanium, metal-plastic,
Bimetallic composite materials and products.
It can directly manufacture products that meet or approach the size
requirements of the finished product, thereby reducing or eliminating
mechanical processing. The material utilization rate can be as high as 95% or
more. It can also replace copper with iron in some products, which achieves
"saving materials." , Energy saving ".
What is the particle size range of the powder?
Powder size range refers to the size of powder particles that vary between two specified sizes.If the particle size
range of a powder is -80 + 150 mesh, it means that the particle size of these
powders is equal to or less than 80 mesh and greater than 150 mesh. In other
words, these powders passed the 80 mesh sieve, but not the 150 mesh sieve.
What are the special powder forming methods?
Isostatic pressing; (2) Continuous forming; (3) Pressureless
forming; (4) High energy forming; (5) Injection forming.
Which Material Can A Magnet Attract And Which Don't
How Magnetism Works
Understanding which materials respond and which don't is quite simple, but it depends on an understanding of how magnets work in general. The motion of electrons in an atom produces a small magnetic field, but ordinarily, this field is cancelled out by the motion of other electrons and their opposing magnetic fields. However, in some materials, when you apply a magnetic field, the spins of neighboring electrons align with one another, which produces a net field across the whole material. In short, instead of cancelling each other’s fields, the electrons in these materials join together and make a stronger field. In some materials, this alignment disappears when the field is removed, but in others, it remains even after the field has been removed.
Metals That Attract Magnets
Ferromagnetic Metals and AlloysFerromagnetic materials are attracted to magnets because their electrons spin and the resulting “magnetic moments” align easily, and retain that alignment even without an external magnetic field. Ferromagnetic materials such as iron, nickel and cobalt are therefore attracted to magnets, as well as rare-earth metals like gadolinium, neodymium and samarium.Alloys made from these materials are also attracted to magnets, Essentially, any alloy composed of ferromagnetic materials will also be magnetic.
Metals That Don't Attract Magnets
Paramagnetic Metals and MagnetismParamagnetic metals have a weaker attraction to magnets than ferromagnetic metals, and they don’t retain their magnetic properties in the absence of a magnetic field. Paramagnetic metals include platinum, aluminum, tungsten, molybdenum, tantalum, cesium, lithium, magnesium, sodium and uranium.Diamagnetic Metals and MagnetismDiamagnetic metals are actually repelled by magnets rather than to enhance it. These materials include silver, lead, mercury and copper.
Waterjet, also known as water cutting, scientific name is high-pressure water jet cutting technology. It is a widely used abrasive cutting tool today. It has many advantages such as good cutting quality and no thermal processing, and has been well received by the market. What we are sharing today is the principle, advantages and disadvantages of water cutting.
How water cutting works
In the early water cutting, due to the small water pressure, no abrasive was added, and it could only be used to cut relatively soft and low-strength materials such as paper, which has a very narrow application range.Later, with the development of technology, high-pressure water pumps can be used to cut more materials. Early water cutting relied entirely on water pressure to cut materials, but only materials with a lower material strength than water pressure could be used. Great limitation.The water pump pressurizes the water, but the pressure is not enough. What to do? I have to add a booster pump to pressurize the water again to reach the desired pressure. Note that the abrasive cannot be added to the water source or high-pressure water pipeline. , Because the pipeline will be worn through soon, how to add it, can only be added at the nozzle position, let the water and abrasive mix, can not be too close to the exit, because to accelerate him for a distance, only the abrasive has a certain The flow velocity is more lethal, so will the mixed fluid of abrasive and water not wear the nozzle, yes, surely, this is like a seven-injury fist, hurting yourself first and then hurting people, is there any way to avoid it? No, it can only increase its own hardness, so water cutting nozzles are made of very hard and strong materials, such as tungsten carbide ceramic composite materials.The high-six-speed abrasive passes through the material being cut just like sandpaper. It will grind a little metal without passing through it. The continuous high-speed abrasive water mixture and the metal constantly rub, and the effect of the electric wheel is almost the same.
Water cutting advantages
1.Wide range of cuttingCan cut most materials, such as: metal, marble, glass, etc.2.Good cutting qualitySmooth cuts without rough, burr edges.3. No thermal processingBecause it uses water and abrasive cutting, it does not generate heat (or generates very little heat) during processing. This effect is ideal for materials affected by heat. Such as: titanium.4.Environmental protectionThis machine uses water and sand to cut. This kind of sand does not generate toxic gas during processing and can be directly discharged, which is more environmentally friendly.5, no need to change toolsYou don't need to change the cutter unit, one nozzle can process different types of materials and shapes, saving cost and time.With so many advantages, of course, they are widely used now. 3 axis / 4 axis / 5 axis water cutting machines are more common. Water cutting can cut out the whole impeller, which is very powerful!
Disadvantages of water cutting
Disadvantages of water cutting1. High use cost, requiring a lot of water and sediment;2. Great pollution to the production environment;3. High maintenance cost;4. Cutting carbon steel plate is easy to rust, which affects the aesthetics of the product.
Water cutting thickness
Normal water pressurizes water to 4,000 bar (60,000 psi) through an ultra-high pressure intensifier, and then through a small nozzle (0.004 inches to 0.016 inches in diameter) produces a water arrow speed of 915 meters per second at about three times the speed of sound Water Arrow can do a variety of surface treatments and cut a variety of non-metallic materials such as paper, diapers, glass, optical fibers, sponges, etc.For cutting metal and hard materials, such as various stone, glass, ceramics, ceramic tiles and other materials, mix garnet in high pressure water to improve their cutting ability. This high-speed sand cutting can cut almost any material. In general, the water cut steel plate test has reached a maximum thickness of 200mm.
China's rare earth resources are abundant and diverse. The rare earth elements include 17 elements such as lanthanum, cerium, lanthanum and cerium. In recent years, rare earths have not only been widely used in agriculture, science and technology, national defense and other sectors, but also show their encouraging application prospects in the medical field.The epidemiological survey results showed that the incidence of tumors in rare earth workers was significantly lower than that in the control group. Animal experiments also found that mice were observed to have a significant inhibitory effect on transplanted sarcoma after long-term administration of rare earth. Further research has also confirmed that rare earth elements can inhibit the growth and proliferation of various human tumor cell lines (such as breast cancer, lung cancer, stomach cancer, leukemia, etc.), and on the other hand, promote the growth of normal cells, which is applied to rare earths. Tumor treatment provides a certain experimental basis.So what is the mechanism of rare earth anti-cancer? Most studies believe that there are mainly the following aspects:1 Rare earth has strong affinity for cancer tissues, and rare earth combined with cancer tissue can interfere with the metabolism of cancer cells and the synthesis of DNA (deoxyribonucleic acid);2 rare earth like a "scissor", can cut the nucleic acid chain, causing it to hydrolyze and break;2 rare earth can selectively destroy the ultrastructure of cells inside malignant or cancerous cells;4 Rare earth can inhibit the expression of oncogenes, and at the same time enhance the expression of tumor suppressor genes.Although studies on the anti-tumor mechanism of rare earths are still under investigation, statistics show that radioactive rare earths account for half of the radioactive elements used to treat cancer. In addition, medical researchers are currently working on the use of rare earths for the treatment of AIDS. Prof. Adachio, an Osaka university, spoke highly of the work and prospects: “Expanding the function of rare earths into the biological field, such as the use of rare earth catalysts to cut off the genes of AIDS and cancer in medicine, will be the largest human Gospel." Visible, in terms of AIDS and cancer, the shock of rare earths will greatly exceed the rare earth oxide high-temperature superconductors that appeared in previous years. It is believed that in the process of conquering tumors and AIDS in the 21st century, rare earths - this anti-cancer star will shine.
There are many substances in the world that change under the action of a powerful magnetic field. This phenomenon is called "magnetization." Magnetization technology is widely used to magnetize various fluids. The rare earth permanent magnet material NdFeB is the most magnetic permanent magnet material in the world, and its appearance has greatly promoted the development of fluid magnetization processing technology.Water is our most closely related fluid. It is magnetized into "magnetized water" under the action of a strong magnetic field. A strong magnetic water processor made of NdFeB permanent magnets can be effectively used for magnetization of water. The magnetic water heater is usually made of a stainless steel casing with a set of NdFeB magnets with N poles and S poles opposite to generate a strong magnetic field. The length and angle of the water molecules are changed when the water is cut by the magnetic lines in the vertical direction through the intermediate channel. Subtle changes can occur, greatly increasing the activity of the water.In daily life, we often see the scaling of water. This is due to the dissolution of calcium and magnesium bicarbonate in water. When heated, calcium and magnesium carbonate precipitates. The harder the water, the more scale. . Scale not only seriously affects heat transfer, reduces heat transfer efficiency of various heat exchangers, increases energy consumption, and causes blockage of pipes. To this end, many industrial and domestic water needs to be softened in advance. The commonly used methods are ion exchange and dosing chemical softening, which are time consuming and labor intensive. The use of NdFeB magnetic water processor can often replace the above-mentioned softening treatment method, and can also play the role of anti-scaling and descaling.The water cooling system of the Institute of Electronics of the Chinese Academy of Sciences (Beijing) used to use the ion exchange method, which not only consumes materials, but also has special personnel to operate and manage. Later, it was changed to NdFeB magnetic water processor (manufactured by Beijing Sanhuan New Materials Co., Ltd.), which does not consume electricity or special personnel. It only needs to change the circulating water once a year. The system can be used for cooling equipment in the whole research institute. From 1991 to today, it has maintained good anti-scaling and anti-algae effects.Many large buildings are now equipped with central air conditioners. Due to the high operating temperature of the compressors, it is necessary to quickly remove the heat with flowing cooling water. If tap water is used for cooling, scaling will occur, resulting in reduced heat exchange efficiency and reduced cooling capacity. The use of neodymium iron boron magnetic magnetic water heater also solves the scaling problem of water cooling system. The NdFeB magnetic magnetic water heater is also used in the heating water supply system of the central air conditioner, the cold storage water supply system, and the heat exchanger for domestic hot water.Magnetized water can also prevent "scaling" in the human body, and often drink magnetized water, which has certain effects on preventing and treating stones in the urinary system and improving digestive function. Therefore, many mineral water pots and magnetic water cups also use NdFeB permanent magnets. The water is magnetized. Due to the high activity of magnetized water, good solubility and permeability, the use of rare earth permanent magnet magnetized water for agriculture, animal husbandry, forestry, and poultry and livestock breeding also has obvious effects of increasing production and income.NdFeB permanent magnet magnetization technology is also used in the wine industry. Inner Mongolia Wulanhaote Brewery adopts magnetization treatment in brewing liquor, which plays the role of aging and ripening, which can shorten the aging time and improve the quality of liquor. The white wine produced by magnetization has a sweet and sweet taste. It has been tested by medical experts and moderately consumed. It also has the effects of lowering blood fat and blood sugar.NdFeB permanent magnets are also used for magnetization of oil and gas fluids. In the oil exploitation, there is also "fouling" on the wall of the oil production pipe, that is, the phenomenon of wax formation occurs, which is easy to block the oil production pipe. After the installation of the NdFeB rare earth permanent magnet anti-wax device, the wax formation can be obviously reduced, the cleaning cycle is extended, and the heavy wax washing operation is reduced, thereby greatly improving the oil recovery efficiency.NdFeB permanent magnet magnetization technology is also used for the magnetization of fuel gas. The car is equipped with a neodymium-iron-boron permanent magnet magnetized fuel-saving device. The magnetization pretreatment of the fuel can make the fuel burn more fully, and the average fuel economy of gasoline and diesel can reach 5%-8%, and the carbon monoxide in the exhaust gas can be reduced. The content of harmful gases such as hydrocarbons is both energy efficient and environmentally friendly. Based on the same principle, an energy-saving magnetizer for rare earth permanent magnet combustion has been developed, which is used for daily cooking and cooking, and has the dual effects of energy saving and environmental protection.The emergence of "a generation of magnetic king" NdFeB rare earth permanent magnet materials has made a quantum leap in fluid magnetization technology. Hangzhou Vector Magnets Col, Ltd. is one of the major NdFeB permanent magnet materials manufacturers in China, and is able to provide patented NdFeB magnets various specifications according to different magnetization technologies. With the continuous development of industrial and agricultural production, rare earth permanent magnet NdFeB magnetization technology will be more and more widely used.
Rare earth, also known as rare earth element, is a general term for 17 kinds of metal elements in the chemical periodic table, such as lanthanides and lanthanum and cerium. It is an important non-renewable strategic material. With unique magnetic, optical, electrical and chemical properties, it can be combined with other elements into a variety of new materials. There are 250 rare earth minerals in nature, and the first to discover rare earths is the Finnish chemist John Gadolin. In 1794, the first rare earth "element" (aluminum, Y2O3) was separated from a bituminous ore-like ore. Because rare earth minerals were found in the 18th century, only a small amount of water-insoluble water could be produced by chemical methods. Oxide, historically used to call this oxide "earth", hence the name rare earth.Rare earth elements are now widely used in the automotive, electronics, aerospace, robotics, telecommunications and healthcare industries, petrochemicals, metallurgy, machinery, and other fields. Two of these rare earths, tantalum and niobium, are key raw materials for super-strong permanent magnets and are critical to the electronics, technology and automotive industries. In general, different rare earths have many important uses in different fields:1. Military rare earth is known as “industrial gold”. Its most remarkable function is to greatly improve the quality and performance of other products. For example, it can greatly improve the steel, aluminum alloy and magnesium alloy used to manufacture tanks, aircraft and missiles. The tactical performance of titanium alloys; rare earths are also high-tech "lubricants" such as electronics, laser, nuclear industry, and superconducting.2. The metallurgical industry adds rare earth metals or fluorides and silicides to steel, which can play the role of refining, desulfurization, neutralization and low melting point harmful impurities, and can improve the processing properties of steel; rare earth ductile iron, especially suitable for production with special The required complex iron parts are widely used in machinery manufacturing such as automobiles, tractors and diesel engines; rare earth metals are added to non-ferrous alloys such as magnesium, aluminum, copper, zinc and nickel to improve the mechanical properties of the alloy at room temperature and high temperature.3. Molecular sieve catalysts made of rare earths for petrochemical industry have the advantages of high activity, good selectivity and strong resistance to heavy metal poisoning. They are widely used in the catalytic cracking process of petroleum; in the process of synthesizing NH3, a small amount of rare earth nitrate is used as a help. The catalyst has a treatment gas volume 1.5 times larger than that of the nickel aluminum catalyst; the composite rare earth oxide can also be used as a catalyst for exhaust gas purification of an internal combustion engine.4, glass ceramic rare earth oxide can be used as polishing powder widely used in the polishing of optical glass, ophthalmic lens, picture tube, plastic and metal tableware; in the process of melting glass, the use of cerium oxide has a strong oxidation effect on iron, It can reduce the iron content in the glass; adding rare earth oxide can produce optical glass and special glass for different purposes; adding rare earth in ceramic glaze and enamel can reduce the fragmentation of glaze and make the product exhibit different color and luster. 5. New materials rare earth cobalt and NdFeB permanent magnet materials are widely used in the electronics and aerospace industries; garnet-type ferrite single crystals and polycrystals formed by the combination of pure rare earth oxides and ferric oxide can be used Microwave and electronics industry; yttrium aluminum garnet and bismuth glass made of high purity cerium oxide can be used as solid laser materials; rare earth hexaboride can be used to make electron emission cathode materials.