Magnet Material

Sintered NdFeB Magnets

 Sintered NdFeB Rare Earth Permanent Magnet Overview

Rare earth Magnets,Flexible magnets,Fridge magnets

Rare earth Magnets,Flexible magnets,Fridge magnets

Rare earth Magnets,Flexible magnets,Fridge magnets

Sintered NdFeB Rare Earth Magnet is a kind of functional material that is necessary for basic industry and frontier science. In order to keep up with the rapid developing trend of NdFeb rare earth magnets production and application in the world, the factory backed by its year's professional experience and convenient well-situated facility, continuously promotes the development and production in the field.

 NdFeB magnet is mainly made of Neodymium Iron and Boron,with excellent magnetic property abundant raw material and reasonable prices, NdFeB Magnet can be used as an ideal magnet in mini-motor Permanent magnetic resonance sound device magnetic suspension system,magnetic transmission machine and iatrical apparatus and etc.For NdFeB,its surface is usually treatd with some special methods.The surface treatment method include Zine Nickel Tin Silver Gold plating Phosphor and Spray Epoxy Resin etc. 

Wide Applications

With its excellent magnetic property, abundant raw material and reasonable prices, rare-earth permanent magnet can be used as an ideal magnet in mini-motor, permanent-magnet instrument,electronic industry, auto industry, petro-chemical industry,nuclear magnetic resonance,sound device, magnetic suspension system, magnetic transmission machine and magnetotherapy apparatus etc.

NdFeB magnets Chemical composition:

Chemical analysis for sintering NdFeB magnets material based on intermetallic compounds RE2Fe14B,main composition is NdFeB magnet is (RE), (Fe) (B),thereinto thulium (Nd), in order to obtain different performance can instead by thulium of (Dy),(Pr) etc. also other metal can instead Fe,for example (Co), (Al) etc., smaller content of boron, but it affect tetragonal crystal intermetallics, making the intermetallics with high magnetization,uniaxial anisotropy and curie temperature.

NdFeB magnets Making process:

NdFeB magnet use Powder Metallurgy Process, proportion of material such as: neodymium, dysprosium, iron, cobalt, niobium, praseodymium, aluminum, iron, and boron etc., through Mid-frequency Induction Furnace smelting to alloy steel ingot, then broken into power of 3~5um,and forming mold in magnetic field, the green bodies sintering dense and tempering in Vacuum Sintering Furnace, that can earn magnetic properties of blank of permanent magnet. After grinding, drilling, cutting and other processing, last via surface finish, it is good NdFeB magnet.

Magnetic Properties of Sintered NdFeB Magnet

GradeRemanenceCoercivity ForceIntrinsic Coercive ForceMax. Energy Productmaximum Operating Temp.
BrHcbHcj BH  © max
mTkGskA/mkOekA/mkOekJ/m3MGOe
N271030-108010.3-10.8≥ 796≥ 10.0≥ 955≥ 12199-23125-2980 ° C
N301080-113010.8-11.3≥ 796≥ 10.0≥ 955≥ 12223-24728-3180 ° C
N331130-117011.3-11.7≥ 836≥ 10.5≥ 955≥ 12247-27131-3480 ° C
N351170-122011.7-12.2≥ 868≥ 10.9≥ 955≥ 12263-28733-3680 ° C
N381220-125012.2-12.5≥ 899≥ 11.3≥ 955≥ 12287-31036-3980 ° C
N401250-128012.5-12.8≥ 907≥ 11.4≥ 955≥ 12302-32638-4180 ° C
N421280-132012.8-13.2≥ 915≥ 11.5≥ 955≥ 12318-34240-4380 ° C
N451320-138013.2-13.8≥ 923≥ 11.6≥ 955≥ 12342-36643-4680 ° C
N481380-142013.8-14.2≥ 923≥ 11.6≥ 876≥ 12366-39046-4980 ° C
N501400-145014.0-14.5≥ 796≥ 10.0≥ 876≥ 11382-40648-5160 ° C
N521430-148014.3-14.8≥ 796≥ 10.0≥ 876≥ 11398-42250-5360 ° C
30M1080-113010.8-11.3≥ 796≥ 10.0≥ 1114≥ 14223-24728-31100 ° C
33M1130-117011.3-11.7≥ 836≥ 10.5≥ 1114≥ 14247-26331-33100 ° C
35M1170-122011.7-12.2≥ 868≥ 10.9≥ 1114≥ 14263-28733-36100 ° C
38M1220-125012.2-12.5≥ 899≥ 11.3≥ 1114≥ 14287-31036-39100 ° C
40M1250-128012.5-12.8≥ 923≥ 11.6≥ 1114≥ 14302-32638-41100 ° C
42M1280-132012.8-13.2≥ 955≥ 12.0≥ 1114≥ 14318-34240-43100 ° C
45M1320-138013.2-13.8≥ 995≥ 12.5≥ 1114≥ 14342-36643-46100 ° C
48M1360-143013.6-14.3≥ 1027≥ 12.9≥ 1114≥ 14366-39046-49100 ° C
50M1400-145014.0-14.5≥ 1033≥ 13.0≥ 1114≥ 14382-40648-51100 ° C
30H1080-113010.8-11.3≥ 796≥ 10.0≥ 1353≥ 17223-24728-31120 ° C
33H1130-117011.3-11.7≥ 836≥ 10.5≥ 1353≥ 17247-27131-34120 ° C
35H1170-122011.7-12.2≥ 868≥ 10.9≥ 1353≥ 17263-28733-36120 ° C
38H1220-125012.2-12.5≥ 899≥ 11.3≥ 1353≥ 17287-31036-39120 ° C
40H1250-128012.5-12.8≥ 923≥ 11.6≥ 1353≥ 17302-32638-41120 ° C
42H1280-132012.8-13.2≥ 955≥ 12.0≥ 1353≥ 17318-34240-43120 ° C
45H1300-136013-13.6≥ 963≥ 12.1≥ 1353≥ 17326-35843-46120 ° C
48H1370-143013.7-14.3≥ 995≥ 12.5≥ 1353≥ 17366-39046-49120 ° C
30SH1080-113010.8-11.3≥ 804≥ 10.1≥ 1592≥ 20223-24728-31150 ° C
33SH1130-117011.3-11.7≥ 844≥ 10.6≥ 1592≥ 20247-27131-34150 ° C
35SH1170-122011.7-12.2≥ 876≥ 11.0≥ 1592≥ 20263-28733-36150 ° C
38SH1220-125012.2-12.5≥ 907≥ 11.4≥ 1592≥ 20287-31036-39150 ° C
40SH1240-128012.5-12.8≥ 939≥ 11.8≥ 1592≥ 20302-32638-41150 ° C
42SH1280-132012.8-13.2≥ 987≥ 12.4≥ 1592≥ 20318-34240-43150 ° C
45SH1320-138013.2-13.8≥ 1003≥ 12.6≥ 1592≥ 20342-36643-46150 ° C
28UH1020-108010.2-10.8≥ 764≥ 9.6≥ 1990≥ 25207-23126-29180 ° C
30UH1080-113010.8-11.3≥ 812≥ 10.2≥ 1990≥ 25223-24728-31180 ° C
33UH1130-117011.3-11.7≥ 852≥ 10.7≥ 1990≥ 25247-27131-34180 ° C
35UH1180-122011.8-12.2≥ 860≥ 10.8≥ 1990≥ 25263-28733-36180 ° C
38UH1220-125012.2-12.5≥ 876≥ 11.0≥ 1990≥ 25287-31036-39180 ° C
40UH1240-128012.5-12.8≥ 899≥ 11.3≥ 1990≥ 25302-32638-41180 ° C
28EH1040-109010.4-10.9≥ 780≥ 9.8≥ 2388≥ 30207-23126-29200 ° C
30EH1080-113010.8-11.3≥ 812≥ 10.2≥ 2388≥ 30223-24728-31200 ° C
33EH1130-117011.3-11.7≥ 836≥ 10.5≥ 2388≥ 30247-27131-34200 ° C
35EH1170-122011.7-12.2≥ 876≥ 11.0≥ 2388≥ 30263-28733-36200 ° C
38EH1220-125012.2-12.5≥ 899≥ 11.3≥ 2388≥ 30287-31036-39200 ° C

1.        以上磁性能参数均为室温下的数据; 

The above-mentioned data of magnetic parameters are given at room temperature.

2.        以上牌号为基本牌号,在基本牌号基础上衍生 T 系列(如 35SHT 等)和 L-T 系列牌号(如 L-38SHT 等),其主要磁性能同对应的基本牌号的主要磁性能。

The above-mentioned grades are our basic grade. We also have T (for instance 35SHT, etc.) and L-T (for instance L-38SHT, etc.) series grades which are derived from these basic grades. The main properties of the derived grades are corresponding to those of the basic grades.

3.        最高工作温度定义是将规定尺寸(稀土永磁为φ 10 × 7 )的样品加热到某一恒定的温度,长时间放置(一般取 1000h ),然后将样品冷却到室温,其开路磁通不可逆损失小于 5% 的最高保温温度定义为该永磁材料的最高工作温度,符号为 Tw ,单位为 K 或℃。

最高工作温度一般依赖于牌号,工作点( Pc 值),镀层和环境等因数。

The max working temperature,which the sampling specification(Permanent Magnet:φ10×7) to heat up to the regular temperature for lay of long time(general 1000H.).   Then take this sampling to cooling attained  room temperature.The irreversible loss of magnetic flux is less than 5%,This max keep temperature definiteness which is the permanent material should be acception by the max temperature. The sign:Tw,The unit:K or ℃

The maximum working temperature of magnet is changeable due to grade, operating point, coating and environmental factors.

Physical Properties of Sintered NdFeB Magnets

Temp.Coeff.of Br -0.11%/ °C Temp.Coeff.of Hc -0.60%/ °C
Density 7.3-7.5g/cm 3 Electrical Resistivity 114 .cm
 Vickers Hardness 600Hv Flexural Resistivity 25kg/mm
Tensile Strength 8.0Kg/mm2  Coeff. Of Thermal Expansion 4X10 -6 / °C
Specific Heat 0.12Kcal/Kg Thermal Conductivity 7.7kcal/[m.h. °C
Young ¡s Modulus 1.6X10[11]N/m2 Rigidity 0.64N/m2
Poisson¡¯s Ratio 0.24  Compressibility 9.8x10-12m2/N
Curie Temperature 310-340 °C

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