Ceramic Magnets

Sintered Ferrite (Hard ferrite magnets) of the main raw material including BaFe12O19 and SrFe12O19, according to the orientation of magnetic crystal divided into isotropic and anisotropic magnets.Because of its low cost and moderate magnetic properties and become the most widely used as a magnet.
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Sintered Ferrite Magnets

Sintered Ferrite (Hard ferrite magnets) were developed in the 1960’s as a low cost alternative to metallic magnets. Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, Ceramic Magnets (Hard ferrite magnets) have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact, measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.

Besides industrial application, Ceramic Magnets (Hard ferrite magnets) are widely use in Educational area.

Sintered Ferrite Magnets

Typical Magnetic Properties

Chinese Standard

Material

Br

HcB

HcJ

(BH) max

mT

KG

KA/m

KOe

KA/m

KOe

Kj/m3

MGOe

Y8T

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

220~2500

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

360~400

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
Y28 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
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 3.8~4.0 230~275 2.89~3.46 235~290 2.95~3.65 27.0~32.0 3.4~4.1
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


USA standard

Material

Br

HcB

HcJ

(BH) max

mT

KG

KA/m

KOe

KA/m

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

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
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/m3 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