Ferrite/Ceramic Magnets

Category: hard ferrite magnets/ ceramic magnets

Advantages: coercive force is high;strong resistance to demagnetization,suitable for dynamic working magnetic circuit structure;good corrosion resistance,surface treatment not needed

Disadvantages: low magnetic energy; not resistant to low temperature

Hard China ferrite magnetsbelong to sintered permanent magnetic material, which made from oxide iron, barium, and strontium carbonate by ceramic processing technology, just because of the processing method, it also named as China ceramic magnetsin America.This magnetic material has strong ability to resist demagnetization and the advantage of low cost.

Ferrite block magnetsclassified as isotropic and anisotropic. Isotropic ferrite magnets have weak magnetic strength, but it can be magnetized through different directions. Anisotropic ferrite magnets have stronger magnetic strength than isotropic, but it can be only magnetized through certain direction.

By magnetic strength, ferrite magnets or ceramic magnets are much weaker than neodymium permanent magnets and SmCo magnets, but stronger than AlNiCo magnets. But its advantages of low cost, excellent corrosion and demagnetization resistance, which makes it widely used in the area of magnetic separator, speaker magnets, magnetic toys, office magnets, car magnets. From the aspect of shape, hard ferrite magnets are usually available as ceramic block magnets, ferrite ring magnets, plastic coated disc magnetsand ceramic block magnets. Ferrite disc magnets often used on office magnets, ferrite ring magnets often used to make loudspeaker, ferrite block magnets can be used to make separate magnets.

Ferrite magnets (ceramic magnets ) was developed in the year of 1960, and it is lower in power (B, Br, BHmax) compared to other formulations, and are very brittle. However, they have very high Hcj and good Tc, and are quite corrosion-resistant. So ceramic magnets are a cost-effective choice.

As a holding magnets manufacturer, Ferrite magnets produced by powder metallurgy ways, the remanence is low, The coercive force is high, especially suit for magnetic structure used in the condition of dynamic operation. The material is hard and crisp, silicon carbide tools are used for cutting machine. The main material for ferrite magnets is oxide, not easy to be rust. Permanent ferrite is corrosion resistant magnets or corrosion proof magnets material.

Grade		Br	HcB	HcJ	(BH)max	Work Temp
China Standard	IEC standard	mT	kA/m(min.)	kA/m(min.)	kJ/m(min.)	℃(max.)
Y10T	HF 8/22	200-235	125-160	210-280	6,5-9,5	250
Y20	HF 20/19	320-380	135-190	140-195	18,0-22,0	250
Y22H	HF 20/28	310-360	220-250	280-320	20,0-24,0	250
Y23	HF 22/30	320-370	170-190	190-230	20,0-25,0	250
Y25	HF 24/16	360-400	135-170	140-200	22,5-28,0	250
Y26H	HF 24/23	360-390	220-250	225-255	23,0-28,0	250
Y26H-2	HF 24/35	360-380	263-288	318-350	24,0-28,0	250
Y28	HF 26/16	370-400	175-210	180-220	26,0-30,0	250
Y25H	HF 26/18	360-390	175-215	215-230	24,0-27,0	250
Y28H	HF 26/24	380-400	240-260	250-280	27,0-30,0	250
Y28H-2	HF 26/26	360-380	270-295	380-405	26,0-30,0	250
Y30	HF 28/16	380-385	190-210	200-220	26,0-28,0	250
Y30BH	HF 28/28	380-400	230-275	235-290	27,0-32,0	250
Y30H-2	HF 30/26	395-415	275-300	310-335	28,5-32,5	250
Y32	HF 32/17	400-420	160-190	165-195	30,0-33,5	250
Y33	HF 32/22	410-430	220-250	225-255	31,5-35,0	250
Y33H	HF 32/25	410-430	240-270	250-275	31,5-35,0	250
Y35	-	410-430	175-195	180-200	30,0-32,0	250

Property/Performance Parameter of Ceramic Magnets(America Standard)

Material	Br		HcB		HcJ		(BH) Max
	mT	KG	KA/m	KOe	KA/m	KOe	Kj/m3	MGOe
C1	230		148		258
C5	380		191		199
C7	340		258		318
C8	385		235		242
C8B	420		232		236
C9	380		280		320
C10	400		288		280
C11	430		200		204

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