Ceramic magnets, sintered ferrite magnets, are those ferrite permanent magnets manufactured by powder molding, sintering and grinding, etc. They have excellent advantages of low cost, strong anti-corrosion ability, high resistivity and low eddy current loss. Ceramic magnets are the most consumed magnets among all types of magnets, they are widely used in automobile motors, motorcycle motors, speakers, household appliances, generators, electrical tools, magnetic separation, etc.
Sintered Ferrite Ceramic Magnets’ Grades, Magnetic Properties
| Magnet Grade[1] |
MMPA Class[2] | Max. Energy Product (BH)max |
Residual Induction Br |
Coercive Force Hcb |
Intrinsic Coercive Force Hcj |
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| MGOe | kJ/m3 | Gauss | mT | Oe | kA/m | Oe | kA/m | ||
| Y8T | 0.8-1.2 | 6.5-9.5 | 2000-2350 | 200-235 | 1570-2010 | 125-160 | 2640-3520 | 210-280 | |
| Ceramic 1 (C1) | 1.05 | 8.35 | 2300 | 230 | 1860 | 150 | 3250 | 260 | |
| Y22H | 2.5-3.0 | 20.0-24.0 | 3100-3600 | 310-360 | 2770-3140 | 220-250 | 3520-4020 | 280-320 | |
| Ceramic 7 (C7) | 2.75 | 21.9 | 3400 | 340 | 3250 | 260 | 4000 | 320 | |
| Y25 | 2.8-3.5 | 22.5-28.0 | 3600-4000 | 360-400 | 1700-2140 | 135-170 | 1760-2510 | 140-200 | |
| Y26H-1 | 2.9-3.5 | 23.0-28.0 | 3600-3900 | 360-390 | 2510-3140 | 200-250 | 2830-3210 | 225-255 | |
| Ceramic 5 (C5) | 3.40 | 27.1 | 3800 | 380 | 2400 | 190 | 2500 | 200 | |
| Y28 | 3.3-3.8 | 26.0-30.0 | 3700-4000 | 370-400 | 2200-2640 | 175-210 | 2260-2770 | 180-220 | |
| Y28H-1 | 3.4-3.8 | 27.0-30.0 | 3800-4000 | 380-400 | 3020-3270 | 240-260 | 3140-3520 | 250-280 | |
| Y28H-2 | 3.3-3.8 | 26.0-30.0 | 3600-3800 | 360-380 | 3410-3710 | 271-295 | 4800-5090 | 382-405 | |
| Y30BH | 3.4-3.7 | 27.0-30.0 | 3800-3900 | 380-390 | 2800-2950 | 223-235 | 2900-3080 | 231-245 | |
| Ceramic 8 (C8) | 3.50 | 27.8 | 3850 | 385 | 2950 | 235 | 3050 | 245 | |
| Y30H-1 | 3.4-4.0 | 27.0-31.5 | 3800-4000 | 380-400 | 2890-3460 | 230-275 | 2950-3650 | 235-290 | |
| Y30H-2 | 3.4-4.0 | 27.0-32.0 | 3950-4150 | 395-415 | 3460-3770 | 275-300 | 3900-4210 | 310-335 | |
| Y32 | 3.8-4.2 | 30.0-33.5 | 4000-4200 | 400-420 | 2010-2390 | 160-190 | 2070-2450 | 165-195 | |
| Y32H-1 | 4.0-4.4 | 31.5-35.0 | 4000-4200 | 400-420 | 2390-2890 | 190-230 | 2890-3140 | 230-250 | |
| Y32H-2 | 3.9-4.3 | 31.0-34.0 | 4000-4400 | 400-440 | 2820-3020 | 224-240 | 2890-3140 | 230-250 | |
| Y33 | 4.0-4.4 | 31.5-35.0 | 4100-4300 | 410-430 | 2770-3140 | 220-250 | 2830-3210 | 225-255 | |
| Y33H | 4.0-4.4 | 31.5-35.0 | 4100-4300 | 410-430 | 3140-3390 | 250-270 | 3140-3460 | 250-275 | |
| Y34 | 4.1-4.5 | 32.5-36.0 | 4200-4400 | 420-440 | 2510-2890 | 200-230 | 2580-2950 | 205-235 | |
| Y35 | 4.2-4.8 | 33.1-38.2 | 4300-4500 | 430-450 | 2700-3000 | 215-239 | 2730-3030 | 217-241 | |
| Y38 | 4.6-5.1 | 36.6-40.6 | 4400-4600 | 440-460 | 3580-3960 | 285-315 | 3710-4080 | 295-325 | |
| Y40 | 4.7-5.2 | 37.6-41.6 | 4400-4600 | 440-460 | 4150-4450 | 330-354 | 4270-4520 | 340-360 | |
[1] Chinese standard SJ/T 10410. In a ferrite magnet grade code, “Y” means it is a sintered ferrite permanent magnet (ceramic magnet), the following number is typical maximum energy product value of this ceramic magnet, the end with “T” means it is isotropic, and “H” means it has higher coercivie force.
[2] American MMPA standard No. 0100-00.
* The values in this sheet are for reference only, ceramic magnets can be tailored as per customers’ specific requirements.