bar NdFeB Magnet

1.0~10.0 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-I12
Means of Transport:	Ocean, Air, experess
Application:	Industrial Magnet
Type:	Permanent
Composite:	Neodymium Magnet
Brand Name:	rainbow magnet
coating:	black epoxy
Production Capacity:	100TON/MONTH
Packing:	standard air cartons or sea package according
Delivery Date:	7-30days

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Product Description

NdFeB bar Magnet, electronic industry magnet

Neodymium Iron Boron 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.

The shortcoming is the low of the Curie temperature and the temperature characteristics, easy to rust, oxidation, Sintered NdFeB's surface is 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.

See the follows Grade H Sintered NdFeB magnetic properties:

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	℃
N33H	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥1353	≥17	247-263	31-33	≤120
N35H	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥1353	≥17	263-279	33-35	≤120
N38H	1.22-1.26	12.2-12.6	907-947	11.4-11.9	≥1353	≥17	287-303	36-38	≤120
N40H	1.26-1.29	12.6-12.9	907-947	11.4-11.9	≥1353	≥17	303-318	38-40	≤120
N42H	1.30-1.33	13.0-13.3	907-947	11.4-11.9	≥1353	≥17	318-334	40-42	≤120
N44H	1.33-1.36	13.3-13.6	907-947	11.4-11.9	≥1274	≥16	334-350	42-44	≤110

demagnetization curve of N40H in difference temperature:

The main physical properties of sintered bar NdFeB magnet

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

the magnetic properties of rare earth magnet:

compare NdFeB and SmCo

item	Js/T	(BH)m /KJ.m-3	HA /MA.m-1	Tc/℃	RE/TM	TM
Nd2Fe14B	1.61	528	6	310	0.117	Fe
SmCo5	1.15	248	32	740	0.166	Co
Sm2Co17	1.56	480	8	890	0.105	Co

Nd-Fe-B permanent magnet with its excellent performance, abundant raw material and reasonable price is to be rapid development and wide application.

Also becoming increasingly popular across a wide range of novelty products for markets

APPLICATION:

instrumentation,

electro-acoustic motor,

magnetic magnetization device

micro motors,

electronic industry,

automobile industry,

petrochemicals,

nuclear magnetic resonance device,

sound device magnetic suspension system,

magnetic transmission machine