R100xr70X180degreex55mm Y35 Arc Ferrite Magnets for Motor

• Customization: Available
• Certification: RoHS, CE
• Type: Permanent
• Magnetocrystalline Anisotropy: Anisotropic Magnet
• Application: Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet, Craft
• Shape: as Customer′s Request
• Coating: No
• Product Name: R100xr70X180degreex55mm Y35 Arc Ferrite Magnets Fo
• Grade: Y25 Y30 Y30bh Y35, etc.
• Resistivity (P): 10 Ohm.Cm
• Density (D): 4.8 - 4.9 g/cm3
• Expansion Coefficients (R): -8 10-6 /Degree Celsius
• Composite: 35% Strontium 20% Barium Ferrit
• Material: Isotropic Ferrite Magnets/ Anisotropic Ferrite M
• Color: All Black
• Certificate: Ce, SGS, RoHS
• Applications: DC Motors, Louderspeaks, Magnetic Separators, Auto
• Transport Package: as Customer′s Request
• Specification: R100xr70x180degreex55mm
• Trademark: GME
• Origin: Xiamen
• HS Code: 85051900
• Production Capacity: 10000tons/Year

Product Description

General Information
 

• Ceramic magnets (Ferrite magnets) are sintered permanent magnets composed of Barium or Strontium Ferrite.
• This class of magnets, aside from good resistance to demagnetization, has the popular advantage of low cost.

• Ferrite magnets are very hard and brittle, and require specialized machining techniques. Moreover, they should be machined in an unmagnetized state.
• We are equipped to machine these materials to specifications.

• Anisotropic grades are oriented in the manufacturing direction, and must be magnetized in the direction of orientation.
• Isotropic grades are not oriented and can be magnetized in any direction, although some degree of greater magnetic strength will be found in the pressing dimension, usually the shortest dimension.

• Due to their low cost, Ferrite magnets enjoy a very wide range of applications, from motors and loudspeakers to toys and crafts, and are the most widely used permanent magnets today.

 

Manufacturing
 
Pressing and sintering involves pressing very fine ferrite powder in a die, and then sintering this pressed magnet. All fully dense Ferrite magnets are produced this way. Ferrite magnets can be wet pressed or dry pressed. Wet pressing yields better magnetic properties, but poorer physical tolerances. Generally, the powder is dry for grade 1 or 5 materials, and wet for grade 8 and higher materials. Sintering involves subjecting the material to high temperatures to fuse the pressed powder together, thus creating a solid material. Magnets produced through this process usually need to have some finish machining, otherwise surface finishes and tolerances are not acceptable. Some manufacturers extrude instead of press wet powder slurry and then sinter the material. This is sometimes done for arc segment shapes, where the arc cross-section is extruded in long lengths, sintered, and then cut to length.
 
Injection Molding: Ferrite powder is mixed into a compound and then injection molded in the same way as plastic.
Tooling for this manufacturing process is usually very costly. However, parts produced through this process can have very intricate shapes and tight tolerances. Injection molded ferrite properties are either lower or about the same as grade 1 Ferrite.
 


Surface Treatments
 The corrosion resistance of Ferrite is considered excellent , and no surface treatments are required.
However, Ferrite magnets may have a thin film of fine magnet powder on the surface and for clean, non-contaminated applications, some form of coating may be required.
 
 
Magnetizing and Handling
Ferrite magnets require magnetizing fields of about 10 kOe.
They can be magnetized with multiple poles on one or both pole surfaces.
No special handling precautions are required, except that large blocks of Ferrite magnets are powerful, and care should be taken to ensure that they do not snap towards each other.
 

Temperature Effects
Up to about 840F, changes in magnetization are largely reversible, while changes between 840F and 1800 F are re-magnetizable.
For all Ferrite magnets, the degradation of magnetic properties is essentially linear with temperature.
At 350 F, about 75% of room temperature magnetization is retained, and at 550 F, about 50% is retained.
 

Common Applications for Ferrite Magnets
Ferrite magnets are widely used in motors, magnetic couplings, for sensing, loudspeakers, holding-magnet systems, crafts, magnetic therapy, novelties, and toys.
 
 
  Chinese standard -sj/T10410 2000 permanent ferrite magnet standard

Material	Br		HcB		HcJ		(BH)max
	mT	KG	KA/m	Oe	KA/m	Oe	Kj/m³	MGOe
Y8T	200~235	≥2000	125~160	≥1570	210~280	≥2610	6.5~9.5	≥0.8
Y22H	310~360	≥3100	220~250	≥2770	280~320	≥3520	20.0~24.0	≥2.5
Y25	360~400	≥3600	135~170	≥1700	140~200	≥1760	22.5~28.0	≥2.8
Y26H-1	360~390	≥3600	220~250	≥2512	225~255	≥2830	23.0~28.0	≥2.9
Y26H-2	360-380	≥3600	263-288	≥3300	318-350	≥4000	24.0-28.0	≥3.0
Y27H	370~400	≥3500	225-240	≥2830	235-260	≥2950	25.0~29.0	≥3.1
Y28	370-400	≥3700	175-210	≥2200	180-220	≥2260	26.0-30.0	≥3.3
Y28H-1	380-400	≥3800	240-260	≥3020	250-280	≥3140	27.0-30.0	≥3.1
Y28H-2	360-380	≥3600	271-295	≥3400	382-405	≥1800	26.0-30.0	≥3.3
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
Y30H-1	380~400	≥3800	230-275	≥2890	235-290	≥2950	27.0~32.5	≥3.4
Y30H-2	395-415	≥3950	275-300	≥3460	310-335	≥3900	27.0~32.0	≥3.4
Y32	400~420	≥4000	160~190	≥2010	165~195	≥2070	30.0~33.5	≥3.8
Y32H-1	400-420	≥4000	190-230	≥2390	230-250	≥2890	34.5-35.0	≥4.0
Y32H-2	400-440	≥4000	224-240	≥2810	230-250	≥2890	31.0-34.0	≥3.9
Y33	410~430	≥4100	220~250	≥2760	225~255	≥2830	31.5~35.0	≥4.0
Y33H	410-430	≥4100	250-270	≥3140	250-275	≥3140	31.5-35.0	≥4.0
Y34	420-440	≥4200	200-230	≥2510	205-235	≥2580	32.5-36.0	≥4.1
Y35	430-450	≥4300	215-239	≥2700	217-242	≥2730	33.1-33.2	≥4.2
Y36	440-450	≥4400	247-271	≥3100	250-374	≥4400	35.1-38.3	≥4.4
Y38	440-460	≥4400	285-305	≥3580	294-310	≥3690	36.6-40.6	≥4.6
Y40	450-460	≥4500	330-354	≥4150	340-360	≥4270	37.6-41.8	≥4.7

 
USA standard - permanent ferrite magnet industry standard of USA

Material	Br		HcB		HcJ		(BH)max
	mT	KG	KA/m	KOe	KA/e	KOe	kj/m³	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	4.00	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	4.0	288	3.617	280	3.51	30.4	3.82
C11	430	4.3	200	2.512	204	2.56	34.4	4.32

 
 
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3. SIZE
4. SHAPE
5. COATING(if any)
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