News -China Rare Earth Permanent Magnet Manufacturers

What is the magnetic assembly behind door?

2019-12-13

1. What the assembly look like? 2. they are called?Door holder, door stopper, magnet 3. is their main use?They mainly used for Suction. The magnetic would suck when open so that not swing with wind or crash. 4. make from?Most of holders from strong NdFeB magnet while some … View Details

What permanent magnet material is used for magnetic rods assembly?

2019-11-06

It is well known that magnetic rods mainly plays a filtering role, but today we introduce you not its purpose, nor how it works, about the assembly materials uses, including internal and external materials. The have force difference, because of use different In general, should choose … View Details

Methods for Storage of Neodymium Magnet 20191016

2019-10-17

Magnets, known for iron attracting, are spontaneously strong in magnetism, no matter they natural-made or man-made. The storage of the magnet is an important field us to know. Below some points. For magnets, neodymium boron magnets this case, there several things look for.1. Do not put … Magnets, known for iron attracting, are spontaneously strong in magnetism, no matter they are natural-made or man-made. The storage of the magnet is an important field for us to know. Below are some points. For strong magnets, neodymium iron boron magnets in this case, there are several things to look for.1. Do not put them beside electronics. As magnets have positive and negative poles themselves which would form circuits. Putting magnets beside electronics might have negative influences on electronic equipments and control loops, and even cause malfunction. 2. To avoid oxidation and changes on their appearance, physical properties and performance, please do not store magnets in the damp air.3. People who are allergic to metal close to magnet would cause unsmooth and red skin. Once such situation is found, please stay away from magnets.4. Do not put magnets close to floppy disks, hard drives, credit cards, tapes, television picture tubes. Proximity of magnets to devices such as magnetic recorders can affect or even destruct recorded data. To avert the fading away of magnetism, attention should be paid to below points in terms of neodymium magnet storage.1. Magnets should never be placed around strong currents.2. Should not toast magnets on the fire.3. Magnets are vulnerable to percussion and violent vibration.4. Small magnets cannot be placed with large ones.5. Soft irons should be placed on the two ends of U shaped magnets to connect their N and S poles. 6. Normally the magnetism of neodymium magnets would not fade away if they work at temperature below their max working temperature.7. Should keep magnets away from acid base chemicals. Or they would be rusty or corroded.8. Putting magnets on a plank could effectively protect them from damp.One more tip on magnet storage. Always be very careful when pick and place neodymium magnets, as they are attractive to each other and may pinch your fingers. The magnets are easily to be broken when they attract each other. Above are some tips methods for the magnet storage. Hope they would be of help. Tags: neodymium magnet View Details

What are the permanent magnets measuring instruments commonly used by magnet manufacturers?

2019-09-20

Today we would like to share the magnet measuring instruments commonly used by permanent magnets manufacturers. It is reported that magnetic are flux meters, Tesla meters (also known as Gauss meters), and meters. The following image a digital meter, performance tester. … View Details

How to Isolate the Magnetism of Neodymium Strong Magnets while exporting them by Air?

2019-08-29

Some foreign customers will consult about whether the neodymium magnets could be shipped by air or not. As is known to all, have very strong magnetism, which might affect electronic equipment if bring them airplane. So need demagnetized. The so-called demagnetization, actually themselves … Some foreign customers will consult about whether the neodymium magnets could be shipped by air or not. As is known to all, neodymium magnets have very strong magnetism, which might affect electronic equipment if bring them to the airplane. So the magnets need to be demagnetized. The so-called demagnetization, actually the magnets themselves didn’t lose their magnetism, but weaken their magnetism by using permeability magnetic material to change the magnetic field distribution of magnets, that is magnetism isolation packages. Iron sheets are usually used to isolate the magnetism, they are used to fix inside the six sides of the boxes, and then pack the magnets with foam and carton, so as to pass the security check of airline. What is the principle of isolating magnetism?The principle of isolating magnetism is to shield the magnetic field of magnets, which is mainly about steady-state magnetic field or low frequency magnetic field; it mainly depends on magnetic circuits. If the boxes are made of magnetic mater, the “magnetic lines” that would have gone out of the box are concentrated inside the boxes and form a closure. This greatly reduces leakage of magnetic lines outside the boxes. What are the general methods of isolating magnetism?In order to shielding the magnetism, it would be better if the material has a high magnetic permeability. With same material, thicker is better. With same material and same thickness, the more layers, the better. Besides, to avoid the magnetic lines will be concentrated on one side and leak out more, the strong neodymium magnets should be put in the center of shielding box. Second, material will be magnetized. The permeability magnetic material is always magnetized in the magnetic field. But except hard magnetic material, the magnetism will be immediately eliminated once external magnetic field is removed. Therefore, if the shielding material is made from hard magnetic material and form a new independent magnetic field, it will influence the shield effects. That’s the reason why we can only use soft magnetic material as shielding material. If you ask now that the soft magnetic material also can be magnetic in the magnetic field, so how it isolate the magnetism? This is because the resulting new magnetic field strength completely changes according to the external original magnetic field strength when the soft magnetic material is magnetized. Then according to the principle of high frequency magnetic field shielding, achieve the shielding effect by magnetic mutual offset. Are you clear about it? Eliminating the magnetism is only to put a layer of material that can isolate magnetism outside the neodymium magnets, which doesn’t have any influences on magnets themselves. Tags: neodymium magnets, strong magnets View Details

What are the considerations for the storage and transportation of neodymium magnets?

2019-08-09

Magnet as a special product, how is it transported, what need to pay attention during transportation? Today, China Rare Earth Limited will explain you. First of all, let’s talk about the storage neodymium magnets. How store them? You should indoor humidity and maintain at … Magnet as a special product, how is it transported, what need to pay attention to during transportation? Today, China Rare Earth Magnet Limited will explain to you. First of all, let’s talk about the storage of neodymium magnets. How to store them? You should pay attention to indoor humidity and maintain at a dry level. The temperature should not exceed room temperature. The product in the black block or blank state should be properly oiled (maybe normal oil). The electroplating product should be vacuum sealed or isolated air storage to ensure the corrosion resistance of the coating. The magnetized product should be absorbed together and boxed to avoid sucking up other metal bodies, and the magnetic product should be stored away from disk, magnetic card, tape, computer monitors, watches, etc., objects that are sensitive to magnetic fields. How to transport neodymium magnets? What do we need to be aware of? Magnet transport is mainly concerned with two kinds of problems, one is how to protect the magnet, and the other is how to prevent the magnet magnetic field generated damage to the surrounding environment and people. First of all, it is important to ensure that the environment in which the magnet is stored during transport is dry. If the humidity is relatively high, it is easy to cause the magnet rust. You can also use some rust-resistant oil to apply to the magnet surface, which is a good way to prevent magnet rust. For magnets with electroplating layers, vacuum transport should be used to prevent corrosion of the plating layer. In addition, the temperature of transport must not be too high. N35 to N52 magnets with temperature more than 80 degrees will appear degaussing problems, so, during the transport, try to maintain the level of room temperature. Second, in order to prevent collisions between magnets during transport, resulting in damage, it is best to separate the magnets from a plank or plastic sheet. In the process of transport, it must prevent intense bumps. In the handling process, operators should also try to handle them gently. Next, it's about solving the environmental impact of the neodymium magnet's magnetic field. First of all, try not to transport magnets together with magnetic field-sensitive items such as computers, watches and so on. The easiest way to shield the magnetic field is to wrap the outside of the magnet in a tin, or with a carbon plate, and then arrange the magnets in such a way that a good magnetic circuit forms inside them. Maglev trains and air transport are good options for transport, but the price will be higher, and if there is air transport, the magnetic field shielding work will be more stringent. If you have any other question about magnets, please feel free to contact us. Tags: neodymium magnet View Details

What are the Advantages of Black Ferrite Magnets China?

2019-07-29

Since something has been widely used, there must be its truth, the advantages of nature. It is reported that ferrite magnet a metal oxide with ferromagnetic. In terms electrical properties, much greater resistivity than and alloy magnetic material, higher dielectric … View Details

Rubber Permanent Magnets for Holding Book on Magnetic Whiteboard 20190315

2019-03-20

The anisotropy rubber magnets have stronger magnetic force than isotropy permanent magnets.Rubber a very special magnetization direction. They can be multi-poles magnetized on one side, and the other there 3M adhesive tape, which strong adhesive.Here is typical anisotropic magnet with … View Details

Production Process of Sintered NdFeB Permanent Magnets 20180820

2018-08-28

The technical process of NdFeB neodymium permanent magnets is as below:1.Raw Material Inspection. Check the raw material through RoHS detection, composition test and purity analysis.2.Raw Pre-treatment. Cutting, baking, polishing material.3.Ingredient Control. After weighed, adjust … The technical process of NdFeB neodymium permanent magnets is as below:1.Raw Material Inspection. Check the raw material through RoHS detection, composition test and purity analysis.2.Raw Material Pre-treatment. Cutting, baking, and polishing the raw material.3.Ingredient Control. After the material is weighed, adjust the ingredients proportionately, and then mix the raw material.4.Strip Casting. The prepared raw materials will be vacuum-treated and then high-temperature smelted to convert the raw materials into fined alloys, the last process is casting.5.Hydrogen Decrepitation. Utilizing the hydrogen-absorption properties of rare earth intermetallic compounds，the NdFeB alloys are placed in a hydrogen atmosphere. The hydrogen enters the alloys along thin layer of rich neodymium, causing alloys to expand, burst and rupture. This guarantees the integrity of grain boundaries between the main phase and the rich neodymium grains. The HD process makes the NdFeB sheet becomes loose, which greatly improves the milling efficiency of the jet mill and reduces the production cost.6.Milling. Milling through jet mill, its principle is that the raw materials are crushed by high-speed collision of materials themselves and then grinding them. In the process of milling, attention should be paid to granularity control, that is, the powder should have random inspection.7.Pressing. Weighing proper raw material powder, and first use magnetic field pressure molding machine as pre-pressing for molding. After that, using the isolate pressing machine for secondary pressing. 8.Sintering. Sintering is the final shaping process of permanent magnet material. This process is mainly carried out in a vacuum sintering furnace, and the NdFeB magnets will be sintered and heat-treated in it. 9.Inspection. This step includes magnetic measurement, temperature coeffieient test, PCT, density measurement, and inspection, etc.10.Machining. After sintering, the NdFeB permanent magnets are still blanks. Further machining is required to obtain different sizes and shapes of products. NdFeB magnets are relatively brittle and they have poor mechanical properties. Therefore, they are generally machined by grinding, wire cutting, and inner blade cutting.11.QC sample test. Random testing for quality control. 12.Chamfering. Chamfering is the pretreatment process before plating. The purpose of this is to reduce uneven plating thickness caused by the relatively concentrated current density at magnet edge during the coating process. 13.Coating. The purpose of coating is to form a protective layer on the surface of magnets. According to the operation environment and appearance demands of magnets, they can be plated by Zn, NiCuNi, phosphating or chemical Ni. 14.Coating Inspection. Check the thickness, corrosion resistance and adhesiveness of Nd permanent magnets, as well as inspecting the tolerance of magnets. The last is a complete inspection so as to meet customers’ requirement. 15.Magnetization. Marking, arraying and magnetizing the magnets. Finally, to ensure the magnetic properties of magnets, a magnetic flux test will be performed.16.Packing. If there’s no problem in the magnetic flux test, the magnets will be packaged. ---Posted by Sintered Neodymium Magnets Manufacturer China Rare Earth Magnet Limited on 20180820 Tags: NdFeB magnets, permanent magnets View Details

China NdFeB Magnets Material Price is on the Rise 201806

2018-07-02

Reasons for the rise of NdFeB magnet raw material prices:1. Metal Nd is main producing neodymium magnets, which contain 50% cost material. China metal production countries. However, China’s rare earth industry economy has declined since 1996, reasons that ability refining … Reasons for the rise of NdFeB magnet raw material prices:1. Metal Nd is the main material of producing neodymium magnets, which contain 50% of the cost of NdFeB material. China is the main Nd metal production countries. However, China’s rare earth industry economy has declined since 1996, for the reasons that China’s ability of rare earth refining increased too fast. This caused the attention of the Chinese government, so government intervened and introduced a new policy called Limiting value-insured Transportation Policy. In recent years, the interaction between market and government intervention has intensified the price fluctuation of metal Nd and influenced the profit margin of NdFeB industry. 2. According to China Merchants Securities in-depth industry research, the supply of praseodymium and neodymium had a huge gap (3000 tons in last year, and this year may reach to 8200 tons). This situation somehow reflects the imbalance between supply and demand. The phenomenon of stopping production because of the lack of raw material begins to appear in the NdFeB magnets industries. What’s more, the price of downstream neodymium begins to increase. It is indicated that the industry will suffer from the shortage of praseodymium and neodymium, which will increase the bargaining power of NdFeB magnets. 3. China’s capital construction demands and environmental regulations increase the price of neodymium raw material and rare metals: due to the increased demands of China’s capital construction and the impact of environmental regulations, the international prices for rare metals which are used as special tools and magnets have increased. The supplies of rare metals are being tightened. The demand sides in China are increasing their inventory. This is also the reason why NdFeB magnet raw material price is increasing.4. Ganzhou district environmental verification: from May 28th to June 12th, the factory price of Praseodymium-Neodymium Oxide has increased. The factory price of Praseodymium-Neodymium alloy has increased. Terbium oxide has increased. Gadolinium oxide has increased. Many industry insiders said that the rise in the price of rare earth material was mainly due to the environmental verification in Ganzhou district. Most rare earth separation companies stopped production. As a result, the supply decreased. Especially some main rare-earth oxides, they have a supply crunch. The upstream manufacturers are reluctant to sell, and the amount of downstream inquiries has increased. Therefore, the price of magnet raw material has risen. ---Posted by NdFeB Permanent Magnets Manufacturer China Rare Earth Magnet Limited on 20180622 Tags: NdFeB magnets, neodymium magnets, permanent magnet, magnet manufacturer, China magnet View Details

Do America increase tariffs have an impact on exporting permanent magnets from China?

2018-06-27

Recently, the US government announced that America is going to impose an additional duty of 25% on about 50 billion dollar products exported from China. On June 15th, 2018, Office United States Trade Representative (USTR) issued a list China’s goods will be subjected extra tariffs. The … Recently, the US government announced that America is going to impose an additional duty of 25% on about 50 billion dollar products exported from China. On June 15th, 2018, the Office of the United States Trade Representative (USTR) issued a list of China’s goods that will be subjected to extra tariffs. The list released today has involved 1102 products, which include products related to “Made in China 2025” industry policy, will be imposed extra tariffs in two stages. The first set contains 818 items of merchandise with a value of approximately $34 billion will be imposed additional duties by the US Customs and Border Protection on July 7th, 2018. The additional tariffs measure for other 284 products with a value of about 16 billion dollar will further solicit public comments. So, will that measure impacts the US companies import magnets like NdFeB, SmCo, AlNiCo, ferrite magnets from China? Extra duties for products the USTR released have two lists. In the list 1, it does cover some magnetic products, which includes flexible permanent magnets or other than of metal (8505.19.10), and other electromagnetic products (8505.20.00, 8505.90.30, 8505.90.40, 8505.90.70, 8505.90.75). Two lists can be found in the reference link below. If you want to see more detailed products list, you can click the first set and the second set, and download the files. You can also learn more about this tariffs policy from this link. It seems that two lists don’t have an impact on those China companies who manufacture and export magnet parts, but it can’t be taken lightly. As a permanent magnet exporting company, what we should do about this additional duty measure is:1. Always pay attention to the changes of products duties. In case any change happens, we should keep close contact with our customers.2. Check out the list of extra tariffs products, and make clear about the obligations of sellers and buyers. Once the products are involved, it is obliged pay for the duties.3. Contracts should be strictly checked before signing to ensure both parties’ interests. Reference URL: https://ustr.gov/about-us/policy-offices/press-office/press-releases/2018/june/ustr-issues-tariffs-chinese-products ---Posted by Permanent Magnets Manufacturer China Rare Earth Magnet Limited on 20180625 Tags: permanent magnet, magnet manufacturer, China magnet View Details

China NdFeB Magnets Material Price is on the Rise 201806

2018-06-27

Reasons for the rise of NdFeB magnet raw material prices:1. Metal Nd is main producing neodymium magnets, which contain 50% cost material. China metal production countries. However, China’s rare earth industry economy has declined since 1996, reasons that ability refining … Reasons for the rise of NdFeB magnet raw material prices:1. Metal Nd is the main material of producing neodymium magnets, which contain 50% of the cost of NdFeB material. China is the main Nd metal production countries. However, China’s rare earth industry economy has declined since 1996, for the reasons that China’s ability of rare earth refining increased too fast. This caused the attention of the Chinese government, so government intervened and introduced a new policy called Limiting value-insured Transportation Policy. In recent years, the interaction between market and government intervention has intensified the price fluctuation of metal Nd and influenced the profit margin of NdFeB industry. 2. According to China Merchants Securities in-depth industry research, the supply of praseodymium and neodymium had a huge gap (3000 tons in last year, and this year may reach to 8200 tons). This situation somehow reflects the imbalance between supply and demand. The phenomenon of stopping production because of the lack of raw material begins to appear in the NdFeB magnets industries. What’s more, the price of downstream neodymium begins to increase. It is indicated that the industry will suffer from the shortage of praseodymium and neodymium, which will increase the bargaining power of NdFeB magnets. 3. China’s capital construction demands and environmental regulations increase the price of neodymium raw material and rare metals: due to the increased demands of China’s capital construction and the impact of environmental regulations, the international prices for rare metals which are used as special tools and magnets have increased. The supplies of rare metals are being tightened. The demand sides in China are increasing their inventory. This is also the reason why NdFeB magnet raw material price is increasing.4. Ganzhou district environmental verification: from May 28th to June 12th, the factory price of Praseodymium-Neodymium Oxide has increased. The factory price of Praseodymium-Neodymium alloy has increased. Terbium oxide has increased. Gadolinium oxide has increased. Many industry insiders said that the rise in the price of rare earth material was mainly due to the environmental verification in Ganzhou district. Most rare earth separation companies stopped production. As a result, the supply decreased. Especially some main rare-earth oxides, they have a supply crunch. The upstream manufacturers are reluctant to sell, and the amount of downstream inquiries has increased. Therefore, the price of magnet raw material has risen. ---Posted by NdFeB Permanent Magnets Manufacturer China Rare Earth Magnet Limited on 20180622 Tags: NdFeB magnets, neodymium magnets, permanent magnet, magnet manufacturer, China magne View Details

Bicycle Speed Meter Induced Magnet 20180611

2018-06-11

China Rare Earth Magnet Limited manufactures magnetic assemblies, like speed meter induced magnet including stainless steel housing and strong neodymium disc magnet. NdFeB permanent magnetGrade of magnets: M, H, SH, UH, EH AHSurface treatment/coating: Zinc, Nickel, Epoxy, Au etcShape … View Details

Screw Pot Magnet 20180330

2018-04-02

Inquire Screw Pot Magnets: We are currently searching for manufacturer screw pot magnets. The minimal required adhesive force is about 5kg.Measurements:D= 10h=10M=M5H= 18 Permanent Magnetic Assembly Manufacturer China Rare Earth Magnet Limited: Regarding your … View Details

Ferrite Magnets Manufacturer 20180116

2018-01-18

Ferrite magnets are made from SrFe12O19 as raw materials, by use of ceramic technology. The texture ferrite magnets is relatively hard, which belong to brittle material. Because a good temperature resistance, low price and moderate performance, have become the most widely used … View Details

Custom NdFeB and SmCo Permanent Magnets 20171204

2017-12-05

Inquire NdFeB & SmCo Magnets: We need a new budget with:1000 pieces of NdFeB1000 YXG32The magnets with the same dimensions.We want buy this week. Please get us best price for quantity requested.Custom Permanent Magnets Manufacturer China Rare Earth Magnet Limited:Please check below … View Details

D5x0.1mm, D10x0.1mm, D10x0.25mm Mini Neodymium Magnets 20171113

2017-11-14

0.1mm Permanent Magnet Sample Request:I would like to request 2 sizes of neodymium magnet samples. I know these magnets need be uncoated due how thin they are. The first will 5mm diameter and thick. second 10mm thick.Each should magnetized through the thickness, highest strength … View Details

Custom Y10T Strontium Ferrite Magnets with Multi-poles 20170930

2017-09-30

China Rare Earth Magnet Limited is experienced in customizing strontium ferrite permanent magnets with multi-poles as per customer's drawing and requirements. The surface fields of this magnet grade Y10T about 210~239 Gauss. For production the magnets magnetization … View Details

N52 Custom Neodymium Permanent Magnet Block 20170914

2017-09-14

Custom Magnet Pricing:What would be your price for a custom magnet?Neodymium Block MagnetsSize: ***mm x **mm **mmSintered neodymium permanent magnet grade N52Ni-Cu-Ni coatingMagnet poles located on the **mmx**mm faces.What is MOQ, minimum order quantity?What ***pcs magnets?We making an … View Details

N52 Neodymium Block Magnets 20170828

2017-08-28

Searching Permanent Magnets Manufacturer:I am interested in N52 Neodymium Magnets. 1. Grade: (NdFeB) 2. Max Temp (degrees °C): 80 °C3. Shape: Cuboid Block4. Length: *** mm (tolerance +/-0.1)5. Width: +/-0.1)6. Thickness: ***mm +/-0.1) =>>> … View Details