NdFeB Magnet for voice coil motors

0.01~20.0 USD

Min. Order:	10 Piece/Pieces
Trade Term:	FOB
Payment Terms:	L/C, T/T, WU
Supply Ability:	100TON/MONTH
Place of Origin:	Zhejiang

Company Profile

Rainbow Magnet Ltd.

Location:	Ningbo, Zhejiang, China (Mainland)
Business Type:	Manufacturer

Product Detail

Model No.:	RM-I13
Means of Transport:	Ocean, Air, experess
Application:	Speaker Magnet
Type:	Permanent
Composite:	Neodymium Magnet
Brand Name:	rainbow magnet
Production Capacity:	100TON/MONTH
Packing:	standard air cartons or sea package according
Delivery Date:	7-30days

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Product Description

NdFeB, (Neodymium Iron Boron magnets Neo magnet), is a type of rare-earth permanent magnet. It is made from an alloy of neodymium, iron, and boron to form the Nd₂Fe₁₄B tetragonal crystalline structure. This material is currently the strongest type of permanent magnet in the world.

There are three main parameters for magnet

the remanence Br (unit: Gauss), is the magnetic energy to measure the parameters of the magnetic field strength;

coercivity Hc (unit Oersted ) is a measure of the anti-demagnetization ability parameters;

the BH(max) (unit Gauss-Oersted), is how much of the characterization can store energy in a physical quantity.

Neodymium magnet have high Br,high Hcj,high (BH)max,and high stability become the important material of the world.

it has a very high energy product and coercivity, can pick up 660 times of own weight of heavy objects.

Nd-Fe-B permanent magnet is manufactured in a wide range of shapes, sizes and grades according customer's demand.

The advantage is high cost-effective, with good mechanical properties, easy cutting; according customer's demand to manufacture in a wide range of shapes, sizes and grades.

Mostly of rare earth permanent magnet always work do not at room temperature or under vacuum, in order to keep the accuracy of shape size and avoid the Corrosion and oxidation, we must make the coating on the surface. usually required for plating such as zinc, nickel, silver, gold, etc., can also be done phosphorus treatment or spray epoxy resin to slow down the oxidation rate.

Sometime, the customers have high demand of NdFeB anti-corrosion, antioxidant, we can design the magnet,add some elements, such as: niobium, vanadium, cobalt and other metal to replace part of the iron to catch the customer requirements of the acid and alkali resistant, antioxidant level, however, because of special material, we need MOQ for it.

Sintered Neo abnormity magnets

See the follows Grade SH Sintered NdFeB magnetic energy parameters

Grade	Residual Induction		Coercive Force		Intrinsic Coercive Force		Maximum Energy Product		Maximum Operating Temperature
	Br		Hcb		Hcj		(BH)max		Tw
	T	KGS	KA/m	KOe	KA/m	KOe	KJ/m3	MGOe	℃
N30SH	1.08-1.12	10.8-11.2	804-844	10.1-10.6	≥1592	≥20	223-239	28-30	≤150
N33SH	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥1592	≥20	247-263	31-33	≤150
N35SH	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥1592	≥20	263-279	33-35	≤150
N38SH	1.22-1.26	12.2-12.6	907-947	11.4-11.9	≥1592	≥20	287-303	36-38	≤150
N40SH	1.26-1.29	12.6-12.9	907-947	11.4-11.9	≥1592	≥20	303-318	38-40	≤150
N42SH	1.30-1.33	13.0-13.3	907-947	11.4-11.9	≥1512	≥19	318-334	40-42	≤140

The main physical properties of sintered NdFeB

magnetic properties	Parameters
Density /g.cm3 Vickers Hardness HV Resistivity /υΩ.cm Compressive strength/N.mm-2 Coefficient of Thermal Expansion (C⊥)/K-1 Coefficient of Thermal Expansion (C∥) /K-1	7.45 570 150 780 -4.8X10-6 -3.4X10-6