Hard Ferrite magnet is also known as Ceramic Magnet or Permanent Ferrite magnet. Since the 1950s, hard ferrite magnets have take more than 75% of the world magnet production, widely used in all industries including Automotive, Aerospace, Military, Advertising, Design House, Electronic and Academic/R&D because of their good environmental stability, excellent corrosion resistance and the advantageous price.The chemical composition of magnets is iron oxide, barium and strontium elements. SrO-6(Fe2O3)or BaO-6(Fe2O3).
This class of magnet is very hard, brittle and possesses lower energy characteristics compared to other magnetic materials. These magnets can be both anisotropic and isotropic. Hard Ferrite magnets are manufactured by pressing, sintering, or injection molding. Partition by shapes,there are Ferrite Segment Magnet, Ferrite Block Magnet, Ferrite Ring Magnet, Ferrite Disc Magnet, Ferrite Irregular Magnet and Ferrite Horseshoe Ring, all available for YanHe Magtech. The magnetic energy products of anisotropic hard ferrite magnets are higher than that of the isotropic hard ferrite magnets by up to 300%. Depending on the base materials, there are Barium Ferrite and Strontium Ferrite with higher coercive. But in recent years Barium Ferrite have been abandoned for environmental and health reasons. After preliminary inspection, the raw materials (mainly iron oxide, strontium carbonate) are weighed, blended, presintered 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.
If you require a bespoke Hard Ferrite / Ceramic magnets or magnetic assembly, Technical Support or our Hard Ferrite / Ceramic Magnet Technical Data Sheet, please contact us. If you need a quotation for an existing magnet shape or a bespoke shape, please contact us. We offer a highly competitive price for your reference.
Typical Magnetic Performance for Hard Ferrite magnet
|
Grade |
Remanence |
Coercive Force |
Intrinsic Coercive |
Max Energy |
Density |
||||
|
Br |
Hcb |
Hcj |
(BH)max |
||||||
|
mT |
Gs |
KA/m |
Oe |
KA/m |
Oe |
KJ/m³ |
MGOe |
g/cm³ |
|
|
Y8T |
200-235 |
≧2000 |
125-160 |
≧1570 |
210-280 |
≧2610 |
6.5-9.5 |
≧0.8 |
4.8 |
|
Y22H |
310-360 |
≧3100 |
220-250 |
≧2770 |
280-320 |
≧3520 |
20.0-24.0 |
≧2.5 |
4.9 |
|
Y25 |
360-400 |
≧3600 |
135-170 |
≧1700 |
140-200 |
≧1760 |
22.5-28.0 |
≧2.8 |
4.9 |
|
Y26H-1 |
360-390 |
≧3600 |
200-250 |
≧2512 |
225-255 |
≧2830 |
23.0-28.0 |
≧2.9 |
4.9 |
|
Y26H-2 |
360-380 |
≧3600 |
263-288 |
≧3300 |
318-350 |
≧4000 |
24.0-28.0 |
≧3 |
4.9 |
|
Y27H |
350-380 |
≧3500 |
225-240 |
≧2830 |
235-260 |
≧2950 |
25.0-29.0 |
≧3.1 |
4.9 |
|
Y28 |
370-400 |
≧3700 |
175-210 |
≧2200 |
180-220 |
≧2260 |
26.0-30.0 |
≧3.3 |
4.9 |
|
Y28H-1 |
380-400 |
≧3800 |
240-260 |
≧3020 |
250-280 |
≧3140 |
27.0-30.0 |
≧3.4 |
4.9 |
|
Y28H-2 |
360-380 |
≧3600 |
271-295 |
≧3400 |
382-405 |
≧4800 |
26.0-30.0 |
≧3.3 |
4.9 |
|
Y30 |
370-400 |
≧3700 |
175-210 |
≧2200 |
180-220 |
≧2260 |
26.0-30.0 |
≧3.3 |
4.9 |
|
Y30BH |
380-390 |
≧3800 |
223-235 |
≧2800 |
231-245 |
≧2900 |
27.0-30.0 |
≧3.4 |
4.9 |
|
Y30H-1 |
380-400 |
≧3800 |
230-275 |
≧2890 |
235-290 |
≧2950 |
27.0-32.5 |
≧3.4 |
4.9 |
|
Y30H-2 |
395-415 |
≧3950 |
275-300 |
≧3460 |
310-335 |
≧3900 |
27.0-32.0 |
≧3.4 |
4.9 |
|
Y32 |
400-420 |
≧4000 |
160-190 |
≧2010 |
165-195 |
≧2070 |
30.0-33.5 |
≧3.8 |
4.9 |
|
Y32H-1 |
400-420 |
≧4000 |
190-230 |
≧2390 |
230-250 |
≧2890 |
31.0-35.0 |
≧3.9 |
4.9 |
|
Y32H-2 |
400-440 |
≧4000 |
224-240 |
≧2810 |
230-250 |
≧2890 |
31.0-34.0 |
≧3.9 |
4.9 |
|
Y33 |
410-430 |
≧4100 |
220-250 |
≧2760 |
225-255 |
≧2830 |
31.5-35.0 |
≧4 |
4.9 |
|
Y33H |
410-430 |
≧4100 |
250-270 |
≧3140 |
250-275 |
≧3140 |
31.5-35.0 |
≧4 |
4.9 |
|
Y34 |
420-440 |
≧4200 |
200-230 |
≧2510 |
205-235 |
≧2580 |
32.5-36.0 |
≧4.1 |
4.9 |
|
Y35 |
430-450 |
≧4300 |
215-239 |
≧2700 |
217-241 |
≧2730 |
33.1-33.2 |
≧4.2 |
4.9 |
|
Y36 |
440-450 |
≧4400 |
247-271 |
≧3100 |
250-374 |
≧3140 |
35.1-38.3 |
≧4.4 |
4.9 |
|
Y38 |
440-460 |
≧4400 |
285-305 |
≧3580 |
294-310 |
≧3690 |
36.6-40.6 |
≧4.6 |
4.9 |
|
Y40 |
450-460 |
≧4500 |
330-354 |
≧4150 |
340-360 |
≧4270 |
37.6-41.8 |
≧4.7 |
4.9 |
Physical property of Hard Ferrite magnets
|
Curie Temperature (°C) |
450 |
|
Maximum Operating Temperature (°C) |
250 |
|
Hardness (Hv) |
480-580 |
|
Density (g/cm3) |
4.8 - 4.9 |
|
Relative Recoil Permeability (μrec) |
1.05 - 1.20 |
|
Saturation Field Strength, kOe (KA/m) |
10 (800) |
|
Temperature Coefficient of Br (%/°C) |
-0.2 |
|
Temperature Coefficient of iHc (%/°C) |
0.3 |
|
Tensile Strength (N/mm) |
<100 |
|
Transverse Rupture Strength (N/mm) |
300 |
USA Standard - Permanent Ferrite / Ceramic magnet
|
Grade |
Remanence |
Coercive Force |
Intrinsic Coercive |
Max Energy |
Density |
Tw Max |
Remark |
||||
|
Br |
Hcb |
Hcj |
BHmax |
||||||||
|
KGs |
mT |
KOe |
KA/m |
KOe |
KA/m |
KJ/m3 |
MGOe |
g/cm3 |
℃ |
||
|
C1 |
2.3 |
230 |
1.86 |
150 |
3.5 |
258 |
8.36 |
1.05 |
4.8 |
250 |
Isotropic |
|
C5 |
3.8 |
380 |
2.4 |
190 |
2.5 |
200 |
27.1 |
3.4 |
4.9 |
250 |
|
|
C7 |
3.4 |
340 |
3.23 |
258 |
4.0 |
318 |
21.9 |
2.75 |
4.9 |
250 |
|
|
C8(C8A) |
3.85 |
385 |
2.95 |
235 |
3.0 |
240 |
27.8 |
3.5 |
4.9 |
250 |
Anisotropic |
|
C8B |
4.2 |
420 |
2.9 |
232 |
2.96 |
236 |
32.8 |
4.1 |
4.9 |
250 |
|
|
C9 |
3.8 |
380 |
3.5 |
280 |
4.0 |
320 |
26.4 |
3.3 |
4.9 |
250 |
|
|
C10 |
4.0 |
400 |
3.6 |
288 |
3.5 |
280 |
30.4 |
3.8 |
4.9 |
250 |
|
|
C11 |
4.3 |
430 |
2.5 |
200 |
2.55 |
204 |
34.4 |
4.3 |
4.9 |
250 |
|
The Standard of International Electronics Committee (IEC404-8-1)
|
Grade |
Remanence |
Coercive Force |
Intrinsic Coercive |
Max Energy |
Density |
||||
|
Br |
Hcb |
Hcj |
(BH)max |
||||||
|
KGs |
mT |
KOe |
KA/m |
KOe |
KA/m |
KJ/m3 |
MGOe |
g/cm3 |
|
|
HF8/22 |
2.00-2.20 |
200-220 |
1.57-1.76 |
125-140 |
2.76-2.89 |
220-230 |
6.5-6.8 |
0.8-1.1 |
4.8 |
|
HF20/19 |
3.20-3.33 |
320-333 |
2.14-2.39 |
170-190 |
2.39-2.51 |
190-200 |
20.0-21.0 |
2.5-2.7 |
4.9 |
|
HF20/28 |
3.10-3.25 |
310-325 |
2.76-2.89 |
220-230 |
3.52-3.64 |
280-290 |
20.0-21.0 |
2.5-2.7 |
4.9 |
|
HF22/30 |
3.50-3.65 |
350-365 |
3.20-3.33 |
255-265 |
3.64-3.77 |
290-300 |
22.0-23.5 |
2.8-3.0 |
4.9 |
|
HF24/16 |
3.50-3.65 |
350-365 |
1.95-2.20 |
155-175 |
2.01-2.26 |
160-180 |
24.0-25.5 |
3.0-3.2 |
4.9 |
|
HF24/23 |
3.50-3.65 |
350-365 |
2.76-2.89 |
220-230 |
2.89-3.01 |
230-240 |
24.0-25.5 |
3.0-3.2 |
4.9 |
|
HF24/35 |
3.60-3.70 |
360-370 |
3.27-3.39 |
260-270 |
4.40-4.52 |
350-360 |
24.0-25.5 |
3.0-3.2 |
4.9 |
|
HF26/16 |
3.70-3.80 |
370-380 |
1.95-2.20 |
155-175 |
2.01-2.26 |
160-180 |
26.0-27.0 |
3.2-3.4 |
4.9 |
|
HF26/18 |
3.70-3.80 |
370-380 |
2.20-2.39 |
175-190 |
2.26-2.39 |
180-190 |
26.0-27.0 |
3.3-3.4 |
4.9 |
|
HF26/24 |
3.70-3.80 |
370-380 |
2.89-3.01 |
230-240 |
3.01-3.14 |
240-250 |
26.0-27.0 |
3.3-3.4 |
4.9 |
|
HF26/26 |
3.70-3.80 |
370-380 |
2.89-3.01 |
230-240 |
3.27-3.39 |
260-270 |
26.0-27.0 |
3.3-3.4 |
4.9 |
|
HF26/30 |
3.85-3.95 |
385-395 |
3.27-3.39 |
260-270 |
3.77-3.89 |
300-310 |
26.0-27.0 |
3.3-3.4 |
4.9 |
|
HF28/26 |
3.85-3.95 |
385-395 |
3.14-3.33 |
250-265 |
3.27-3.45 |
260-275 |
28.0-30.0 |
3.5-3.8 |
4.9 |
|
HF28/28 |
3.85-3.95 |
385-395 |
3.27-3.39 |
260-270 |
3.50-3.60 |
280-290 |
28.0-30.0 |
3.5-3.8 |
4.9 |
|
HF30/26 |
3.95-4.05 |
395-405 |
3.14-3.33 |
250-260 |
3.27-3.39 |
260-270 |
30.0-31.5 |
3.8-3.9 |
4.9 |
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