High-end Neodymium Magnets for Acoustics

Sintered NdFeB magnet is contemporary the most powerful magnet magnetic, it not only has high remanence, high coercive force, high magnetic energy product and high performance price excellent characteristics, such as size and easy processing into various shapes, especially suitable for high power, high magnetic field and miniatu

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Sintered NdFeB magnet is contemporary the most powerful magnet magnetic, it not only has high remanence, high coercive force, high magnetic energy product and high performance price excellent characteristics, such as size and easy processing into various shapes, especially suitable for high power, high magnetic field and miniaturization, light-duty and upgrading of products.

High End Neodymium Magnet for Acoustics

CHARACTERISTICS

GradeRemanence(Br)Coercive Force(bHc)Intrisic Coercive Force(Hcj)Max Energy Product(BH)maxWorking Temp(L/D=0.7)
 KGSTKOeKA/mKOeKA/mMGOeKJ/m?ºC
N3511.8-12.41.18-1.24≥10.5≥835≥12≥955≥33≥263≤80
N3812.3-12.81.23-1.28≥10.8≥859≥12≥955≥36≥286≤80
N4012.6-13.21.26-1.32≥10.8≥859≥12≥95538-41302-326≤80
N4212.8-13.41.28-1.34≥10.8≥859≥12≥95540-44318-350≤80
N4513.2-13.81.32-1.38≥11.0≥875≥12≥95543-47342-374≤80
N4813.6-14.11.36-1.41≥11.2≥891≥12≥95545-49358-390≤80
N5013.9-14.61.39-1.46≥11.2≥891≥12≥95547-51374-405≤80
N5214.2-14.61.42-1.46≥10.2≥812≥11≥87548-53390-422≤80
38M12.3-12.81.23-1.28≥11.5≥915≥14≥111436-38286-302≤100
40M12.6-13.21.26-1.32≥11.8≥939≥14≥111438-41302-326≤100
42M12.8-13.41.28-1.34≥12.0≥955≥14≥111440-43318-342≤100
45M13.2-13.81.32-1.38≥12.2≥971≥14≥111443-46342-366≤100
48M13.6-14.01.36-1.40≥12.5≥995≥14≥111445-49358-390≤100
50M13.9-14.31.39-1.43≥12.5≥995≥14≥111447-51374-405≤100
35H11.7-12.41.17-1.24≥10.8≥859≥17≥135333-37263-295≤120
38H12.3-12.81.23-1.28≥11.5≥915≥17≥135336-40286-318≤120
40H12.6-13.21.26-1.32≥11.8≥939≥17≥135338-41302-326≤120
42H12.8-13.41.28-1.34≥12.0≥955≥17≥135340-43318-342≤120
45H13.2-13.81.32-1.38≥12.2≥971≥17≥135343-46342-366≤120
48H13.6-14.21.36-1.42≥12.8≥1019≥17≥127445-48358-382≤120
33SH11.4-12.01.14-1.20≥10.5≥835≥20≥1592≥31≥247≤150
35SH11.7-12.51.17-1.25≥10.8≥859≥20≥1592≥33≥263≤150
38SH12.2-12.71.22-1.27≥11.3≥899≥20≥159236-39286-310≤150
40SH12.4-13.01.24-1.30≥11.8≥939≥20≥159238-41302-326≤150
42SH12.8-13.61.28-1.36≥12.0≥955≥20≥159239-43310-342≤150
45SH13.2-13.71.32-1.37≥12.2≥971≥20≥159243-46342-366≤150
48SH13.6-14.11.36-1.41≥12.8≥1019≥20≥159245-48358-382≤150
30UH10.8-11.01.08-1.10≥9.5≥756≥25≥199028-31223-247≤180
33UH11.3-11.71.13-1.17≥9.8≥780≥25≥199031-34247-270≤180
35UH11.7-12.11.17-1.21≥10.5≥835≥25≥199033-36263-286≤180
38UH12.2-12.71.22-1.27≥11.3≥899≥25≥199036-39286-310≤180
40UH12.4-13.01.24-1.30≥11.8≥939≥25≥199038-41302-326≤180
30EH10.8-11.51.08-1.15≥10.1≥804≥30≥238828-31223-247≤200
32EH11.3-12.11.13-1.21≥10.5≥835≥30≥238830-33238-263≤200
35EH11.8-12.51.18-1.25≥11.0≥875≥30≥238833-35263-278≤200
38EH12.2-12.71.22-1.27≥11.3≥899≥30≥238836-39286-310≤200
40EH12.4-13.01.24-1.30≥11.8≥939≥30≥238838-41302-326≤200

1T=10kGs,1kOe=79.6kA/m,lMGOe=7.96kJ/m3.

The open flux irreversible loss of the testing sample at this temperature≤5%.

 

PHYSICAL PROPERTIES & COATING

Physical Properties of Sintered NdFeB Material

ItemsParameter ValuesUnit
Curie Temperature310~380ºC
Relative Recoil Permeability1.02~1.05 
Reversible Temperature Coefficient of Br (20~100ºC)-0.09~-0.13%/ºC
Reversible Temperature Coefficient of Hcj (20~100ºC)-0.4~-0.7%/ºC
Density7.50~7.70g/cm3
Vickers Hardness550~700 
Bending Strength-0.09~-0.13MPa
Tensile Strength≥80MPa
Compressive Strength800 ~1050MPa
Electric Resistivity150μΩ·cm
Thermal Conductivity8~10W/(M·ºC)
Coefficient of Thermal Expansion (Parallel to the orientation)510-6/K
Coefficient of Thermal Expansion (vertical to the orientation)-1.510-6/K
Young's Modulus150~200GPa
Specific Heat(20ºC~320ºC)3.0~4.6J/(g·k)
weight loss(low weight loss products)≤2mg/cm2

Physical Properties & Application to Environment of the Coating

Coating MaterialColourPropertiesEnvironment of ApplicationThickness of Coating layer
ZineBlue, Black and rainbow etcCompact, Stable and HomogeneousWith reasonalbe capability of anticorrosion6um≤∮≤12
Nickel-Copper-NickelWhite and blackLight and StableSuitable for higher corrosive environment15μm≤∮≤30pm
PhosphorizationColorless or light grayuniform thicknessshort-term anticorrosion-
EpoxyBlack and Graylayer with certain luster, insurabilitySuitable for higher corrosive environment≥15μm
Parylenetransparencyuniform thickness, density pinholes-free and insurabilityExcellent capability of anticorrosion especially for small items0.1μm≤∮≤100pm
Ni+Cu+EpoxyBlackLayer with certain luster
insurability and stability
Excellent capability of
anticorrosion. Suitable for
hostile environment
salt spray resistance>300hr
10-30μm
Al+EpoxyBlackLayer with certain luster
insurability and stability
Excellent capability of
anticorrosion. Suitable for
hostile environment
salt spray resistance>650hr Widely used in new energy
auto magnets
15-35μm
 
Other characteristics

1. Magnetized method: According to the requirements of customers.

2. Polarity requirements: Mark according to customer requirements.

3. Packaging materials and methods: general use kraft paper, foam board and carton packaging, special cases using vacuum packaging and shielding packaging, each weighing less than 20 kg. If customer has special requirements for packaging according to customer requirements.
High End Neodymium Magnet for Acoustics

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