ring permanent magnetization cosmo ferrites

  Specifications 1) high quality Ferrite materials  2) customized size & accurate tolerance 
3) fast and safe delivery & excellent service   ring permanent magnetization cosmo ferrites Product Description   Ceramic, also known as ferrite, magnets are made of a composite of iron oxide and barium   carbonate (BaCo3) or strontium carbonate (SrCO3).  Ferrite Magnets are charcoal gray in color and usually appear in the forms of discs, rings, blocks, cylinders, and sometimes arcs for motors. Least expensive material compared to alnico and rare earth magnets. Widely available since the 1950's, this material is commonly available and at a lower cost than the types of materials used in permanet magnets.Ceramic magnets are made using pressing and sintering. Sintered magents are a type of ceramic composed of the compressed powder of the alloy material being used.Sintering involves the compaction of fine alloy powder in a die and then fusing the powder into a solid material with heat. While the sintered magets are solid ,their physical properties are more similar to a seramic and are easily broken and chipped. Ceramic magents are brittle and hard generally requiriing diamond wheels to grind and shape.These magnets come in a number of different grades. Ceramic-1 is an isotropic grade with equal magnetic properties in all directions.  Ceramic grades 5 and 8 are anisotropic grades. Ansotropic magents are magnetized in the direction of pressing.The anisotropic method delivers the highest energy product among ceramic magnets at values up to 3.5 MGOe ( Mega Gauss Oersted). Ceramic magnets have a good balance of magnetic trength, resistance to demagnetizing and economy. They are the most wide used magents today.  Beneficial characteristics of ceramic magnets include their low cost, high coercive force, resistance to corrosion, and high heat tolerance. Drawbacks include their low energy product or "strengh",low mechanical strengh, and the ferrite poweder on the surface of the material which can rub of and cause soiling.   Related Products        

Magnetic properties of Sintered Ferrite Magnets
Chinese standard
Material	Br		Hcb		Hcj		(BH)max
	mT	KGs	KA/m	KOe	KA/m	KOe	KJ/m 3	MGOe
Y10T	200~235	2.0~2.35	125~160	1.57~2.01	210~280	2.64~3.52	6.5~9.5	0.8~1.2
Y20	320~380	3.2~3.8	135~190	1.70~2.38	140~195	1.76~2.45	18.0~22.0	2.3~2.8
Y22H	310~360	3.1~3.6	220~250	2.77~3.14	280~320	3.52~4.02	20.0~24.0	2.5~3.0
Y23	320~370	3.2~3.7	170~190	2.14~2.38	190~230	2.39~2.89	20.0~25.5	2.5~3.2
Y25	360~380	3.6~4.0	135~170	1.70~2.14	140~200	1.76~2.51	22.5~28.0	2.8~3.5
Y26H	360~390	3.6~3.9	220~250	2.77~3.14	225~255	2.83~3.21	23.0~28.0	2.9~3.5
Y27H	370~400	3.7~4.0	205~250	2.58~3.14	210~255	2.64~3.21	25.0~29.0	3.1~3.7
Y30	370~400	3.7~4.0	175~210	2.20~2.64	180~220	2.26~2.77	26.0~30.0	3.3~3.8
Y30BH	380~390	3.8~3.90	223~235	2.80~2.95	231~245	2.90~3.08	27.0~30.0	3.4~3.7
Y30-1	380~400	3.8~4.0	230~275	2.89~3.46	235~290	2.95~3.65	27.0~32.0	3.4~4.0
Y30H-2	395~415	3.95~4.15	275~300	3.46~3.77	310~335	3.90~4.21	28.5~32.5	3.5~4.0
Y32	400~420	4.0~4.2	160~190	2.01~2.38	165~195	2.07~2.45	30.0~33.5	3.8~4.2
Y33	410~430	4.1~4.3	220~250	2.77~3.14	225~255	2.83~3.21	31.5~35.0	4.0~4.4
Y35	400~410	4.00~4.10	175~195	2.20~2.45	180~200	2.26~2.51	30.0~32.0	3.8~4.0
USA standard
Material	Br		Hcb		Hcj		(BH)max
	mT	KGs	KA/m	KOe	KA/m	KOe	KJ/m 3	MGOe
C1	230	2.3	148	1.86	258	3.5	8.36	1.05
C5	380	3.8	191	2.4	199	2.5	27	3.4
C7	340	3.4	258	3.23	318	4	21.9	2.75
C8(=C8A)	385	3.85	235	2.95	242	3.05	27.8	3.5
C8B	420	4.2	232	2.913	236	2.96	32.8	4.12
C9	380	3.8	280	3.516	320	4.01	26.4	3.32
C10	400	4	288	3.617	280	3.51	30.4	3.82
C11	430	4.3	200	2.512	204	2.56	34.4	4.32
Europe standard
The standard from International Electronics Committee (IEC404-8-1)
O× 100=Y10T=C1    × 300=Y30=C5    O× 330=Y30 BH
Grade	Allowed Value (min-typical)
	Br		Hcb		BrHcj		(BH)max
	mT	KGs	KA/m	KOe	KA/m	KOe	KJ/m 3	MGOe
HF8/22	200-220	2.00-2.20	125-140	1.57-1.76	220-230	2.76-2.89	6.5-6.8	0.8-1.1
HF20/19	320-333	3.20-3.33	170-190	2.14-2.39	190-200	2.39-2.51	20.0-21.0	2.5-2.7
HF20/28	310-325	3.10-3.25	220-230	2.76-2.89	280-290	3.52-3.64	20.0-21.0	2.5-2.7
HF22/30	350-365	3.50-3.65	255-265	3.20-3.33	290-300	3.64-3.77	22.0-23.5	2.8-3.0
HF24/16	350-365	3.50-3.65	155-175	1.95-2.20	160-180	2.01-2.26	24.0-25.5	3.0-3.2
HF24/23	350-365	3.50-3.65	220-230	2.76-2.89	230-240	2.89-3.01	24.0-25.5	3.0-3.2
HF24/35	360-370	3.60-3.70	260-270	3.27-3.39	350-360	4.40-4.52	24.0-25.5	3.0-3.2
HF26/16	370-380	3.70-3.80	155-175	1.95-2.20	160-180	2.01-2.26	26.0-27.0	3.2-3.4
HF26/18	370-380	3.70-3.80	175-190	2.20-2.39	180-190	2.26-2.39	26.0-27.0	3.3-3.4
HF26/24	370-380	3.70-3.80	230-240	2.89-3.01	240-250	3.01-3.14	26.0-27.0	3.3-3.4
HF26/26	370-380	3.70-3.80	230-240	2.89-3.01	260-270	3.27-3.39	26.0-27.0	3.3-3.4
HF26/30	385-395	3.85-3.95	260-270	3.27-3.39	300-310	3.77-3.89	26.0-27.0	3.3-3.4
HF28/26	385-395	3.85-3.95	250-265	3.14-3.33	260-275	3.27-3.45	28.0-30.0	3.5-3.8
HF28/28	385-395	3.85-3.95	260-270	3.27-3.39	280-290	3.50-3.60	28.0-30.0	3.5-3.8
HF30/26	395-405	3.95-4.05	250-260	3.14-3.33	260-270	3.27-3.39	30.0-31.5	3.8-3.9
HF32/17	410-420	4.10-4.20	160-180	2.01-2.26	165-175	2.07-2.20	32.0-33.0	4.0-4.1
HF32/22	410-420	4.10-4.20	215-225	2.70-2.83	220-230	2.76-2.89	32.0-33.0	4.0-4.1
HF32/25	410-420	4.10-4.20	240-250	3.01-3.14	250-260	3.14-3.27	32.0-33.0	4.0-4.1

    Packaging & Shipping     Relevant Shipping Advantage   1) Appointed forwarder is welcome 2) We can ship by express, air & sea 3) We have big discount on our won forwarder, and mainly world-wide express such as : DHL, UPS, Fedex    Contact us    Please do no hesitate to contact with us if you have any questions or requests on magnet. You can inquiry either by email/fax or instant message We are pleased to offer your service and respond within 12 hours   Contact person:Ruby Xu Skype: uskymag09 Tel:+86-574-88229324-813 Fax:+86 574 87687170 Welcome to contact with us! Tel:+86-574-88229324-813 Fax:+86 574 87687170