Ferrite Magnets

Categories	Ferrite Magnets
Brand	CINFER Magnet
Material	Sintered Ferrite Magnets
Shape	Main Disc, but Block or Rectangular or Cuboid, Ring, Cylinder, Arc and Irregular shape are also available
Magnetized direction	Axially or Diametrical Magnetized, but Thickness, Multipoles and Radial magnetization are also available
Certificate	ISO/TS 16949, ISO9001, ISO14001, RoHS, REACH
Packing	Standard sea or air packing, such as carton, wooden box, pallet etc.
Transportation	courier (TNT, DHL, FedEx, UPS), air or sea.
Update Time	Nov 23,2024

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Detail Information

Introduction

Magnetic properties

Manufacturing process

Physical properties

Since the 1950s, hard ferrite (ceramic) magnets have been widely applied because of low cost, good magnetic properties and excellent environmental stability. Both isotropic and anisotropic hard ferrite magnets are available for Cinfer. The magnetic energy products of anisotropic hard ferrite magnets are higher than that of the isotropic hard ferrite magents by up to 300%. Depending on the base materials, there are Barium Ferrite and Strontium Ferrite with higher coercive. After preliminary inspection, the raw materials (mainly iron oxide, strontium carbonate) are weighed, blended, pre-sintered and milled to fine powders with hexagonal crystals. For isotropic magnets, the pre-materials are milled to powders and then pressed. For anisotropic magnets there are two procedures in the production, dry press and wet press. Firstly, the raw materials are dried and then pressed in a magnetic field. Secondly, the raw materials are wet pressed under the influence of a magnetic field, then followed by sintering, finishing cleaning and magnetization. Finally the surface can be machined, marked, magnetized or coated according to customers' requirements.

Ceramic magnets are very hard and brittle, consequently machining must be done with a diamond wheel, and is easier when done prior to magnetization. Standard tolerances for ceramic magnet dimensions are +/-.005″ for ground dimensions and +/- 2% of feature size for dimensions. Because of their brittleness these magnets will not withstand impact or flexing. We recommend that they not be used for structural purposes.Ceramic magnets are chemically inert non-conductors, which is a benefit in many applications according to different grade as below

Maximum operating temperature for a ceramic magnet is 250°C. Although you will experience magnetic losses when operating at elevated temperatures, the losses are recovered when the material is brought down to normal ambient temperature. However, operating in very cold temperatures (-20°C) can result in permanent losses of magnetic strength unless the circuit has been designed for such extremes.

Pros：

1. least expensive material compared to alnico magnets or rare earth magnets

2. High intrinsic coercive force

3. Corrosion resistance

烧结铁氧体性能表

Sintered Hard Ferrite Magnetic Property Table

牌号 Grade	剩磁 Br Residual Induction				磁感矫顽力 HcB Coercive Force				内禀矫顽力 Hcj Intrinsic Coercive Force			最大磁能积 (BH)max Maximum Energy Products							Other Equivalent (Reference Only)
牌号 Grade	mT		kGs		KA/m		KOe		KA/m		KOe	KJ/m3				MGOe			Other Equivalent (Reference Only)
	min	max	min	max	min	max	min	max	min	max	min		max	min	max		min	max

Y8T	200	235	2.00	2.35	125	160	1.57	2.01	210	280	2.64		3.51	6.50	9.50		0.80	1.20	HF8/22, C1, FB1A

Y22H	310	360	3.10	3.60	220	250	2.76	3.14	280	320	3.51		4.02	20.00	24.00		2.50	3.00	HF20/28

Y25	360	400	3.60	4.00	135	170	1.70	2.14	140	200	1.76		2.51	22.50	28.00		2.80	3.50	HF25/14

Y26H-1	360	390	3.60	3.90	200	250	2.51	3.14	225	255	2.83		3.20	23.00	28.00		2.90	3.50	HF25/22

Y26H-2	360	380	3.60	3.80	263	288	3.30	3.62	318	350	3.99		4.40	24.00	28.00		3.00	3.50	HF24/35, C9, PMF-2BB, C7

Y27H	350	380	3.50	3.80	225	240	2.83	3.01	235	260	2.95		3.27	25.00	29.00		3.10	3.60	HF22/30

Y28	370	400	3.70	4.00	175	210	2.20	3.64	180	220	2.26		2.76	26.00	30.00		3.30	3.80	HF26/18, C5

Y28H-1	380	400	3.80	4.00	240	260	3.01	3.27	250	280	3.14		3.52	27.00	30.00		3.40	3.80	FB4B, C10

Y28H-2	360	380	3.60	3.80	271	295	3.40	3.70	382	405	4.80		5.08	26.00	30.00		3.30	3.80	FB6E, PMF-2BF

Y30H-1	380	400	3.80	4.00	230	275	2.89	3.46	235	290	2.95		3.64	27.00	32.50		3.40	4.10	HF26/26, C8, PMF-2BD

Y30H-2	395	415	3.95	4.15	275	300	3.45	3.77	310	335	3.89		4.20	27.00	32.00		3.40	4.00	HF26/30, PMF-2BE, FB5H, C12, PMF-5BE

Y32	400	420	4.00	4.20	160	190	2.01	2.39	165	195	2.07		2.45	30.00	33.50		3.80	4.20	HF32/17

Y32H-1	400	420	4.00	4.20	190	230	2.39	2.89	230	250	2.89		3.14	31.50	35.00		3.90	4.40	HF32/22, FB4D, C8B

Y32H-2	400	440	4.00	4.40	224	240	2.81	3.01	230	250	2.89		3.14	31.00	34.00		3.90	4.30	HF32/25, FB5N, PMF-7BB

Y33	410	430	4.10	4.30	220	250	2.76	3.14	225	255	2.83		3.20	31.50	35.00		3.90	4.40	C8B, PMF-2BB, FB4X, C11, PMF-6BB

Y33H	410	430	4.10	4.30	250	270	3.14	3.39	250	275	3.14		3.45	31.50	35.00		3.90	4.40	PMF-6BD, FB5B, PMF-5BD

Y34	420	440	4.20	4.40	200	230	2.51	2.89	205	235	2.57		2.95	32.50	36.00		4.10	4.40	C11, PMF-5BB

Y35	430	450	4.30	4.50	215	239	2.70	3.00	217	241	2.73		3.03	33.10	38.20		4.10	4.80	PMF-7BB

Y36	430	450	4.30	4.50	247	271	3.10	3.40	250	274	3.14		3.44	35.10	38.30		4.40	4.80	FB6N, PMF-7BD

Y38	440	460	4.40	4.60	285	305	3.58	3.83	294	310	3.69		3.89	36.60	40.60		4.60	5.10	FB9N, PMF-9BD

Y40	440	460	4.40	4.60	330	354	4.15	4.45	340	360	4.27		4.52	37.60	41.80		4.70	5.20	FB9B, PMF-9BE

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Ferrite Magnets

Ferrite Magnets