Fujian Xingyuan Magnetic Materials Co.,Ltd

Sintered Ferrite Magnets

Sintered hard ferrite magnets are manufactured by a die pressing followed by sintering process which allows economic production of components in a varied array of sizes and shapes. Ferrite magnets have excellent corrosion resistance and have normal operating capabilities between -40 °C and +250 °C.

When considering a new design using hard ferrite magnets, in order to minimize the potential for manufacturing difficulties and to be more assured of a satisfactory, and perhaps less costly product, one should bear in mind a few rules: 1,) The maximum thickness in the direction of pressing should be approximately one inch, and this dimension (also called the magnetic length) should be less than any other dimension. If greater thickness is needed for a particular application, two or more magnets may be stacked and cemented together. 2,) Whenever possible, magnetic circuits should be designed to accommodate unground dimensional tolerances (except for the thickness, which is normally ground to ±005 inch. Additional grinding is usually a significant portion of the total cost. 3,) Slots, steps, or any abrupt change in cross section should be avoided. The arc ends of motor segments should preferably be flat at the outside corner.

Manufactured from oxide materials using powder metallurgical process. Ferrite magnet is most widely used because of its low cost, high-energy, good electric insulation and excellent resistance to demagnetization. The most common type of ferrite magnets are anisotropic strontium, anisotropic barium and isotropic barium magnet.

Our huge range of ferrite magnets can ensure us to supply assortment of goods to choose from, which includes arc segments, ring types discs, blocks, bars and more, in a variety of sizes and shapes. This selection includes all grades, oriented and non-oriented, bi-pole and multi-pole magnets.


Mostly Used national standard - SJ285-77 permanent ferrite magnet standard








Grade
Value (min/typical in our factory)








Br
Hcb(BHC)
Hcj(IHC)
(BH)max





MT
KG
KA/m
KOe
KA/m
KOe
Kj/m3
MGOe
Y10T(=C1)
200/218
2.00/2.18
125/145
1.57/1.82
210/250
2.64/3.14
6.5/8.0
0.8/1.0
Y25
360/370
3.60/3.70
135/150
1.70/1.88
140/170
1.76/2.14
22.5/25.3
2.8/3.2
Y30(=C5)
380/385
3.80/3.85
191/210
2.40/2.64
199/220
2.50/2.51
26.0/28.0
3.4/3.7
Y30BH
380/390
3.80/3.90
223/235
2.80/2.95
231/245
2.90/3.08
27.0/30.0
3.4/3.7
Y33
410/420
4.10/4.20
220/235
2.77/2.95
225/240
2.83/3.01
31.5/33.0
4.0/4.2
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
C8(=C8A)
385/390
3.85/3.90
235/255
2.95/3.20
242/265
3.05/3.33
27.8/30.0
3.5/3.7
C10
400/410
4.00/4.10
288/300
3.62/3.77
280/287
3.51/3.60
30.4/31.9
3.8/4.0




Chinese standard -sj/T10410 2000 permanent ferrite magnet standard








Grade
Br
HCB
HCJ
(BH)max





mT
KG
KA/m
Oe
KA/m
Oe
Kj/m3
MGOe
Y8T
200~235
2.0~2.35
125~160
≥1.57
210~280
≥2.610
6.5~9.5
≥0.8
Y22H
310~360
3.1~3.6
220~250
≥2.77
280~320
≥3520
20.0~24.0
≥2.5
Y25
360~400
3.6~4.0
135~170
≥1.70
140~200
≥1760
22.5~28.0
≥2.8
Y26H-1
360~390
3.6~3.9
220~250
≥2.512
225~255
≥2830
23.0~28.0
≥2.9
Y26H-2
360~380
3.6~3.8
263~288
≥3.30
318~350
≥4000
24.0~28.0
≥3.0
Y27H
370~400
3.7~4.0
225~240
≥2.83
235~260
≥2950
25.0~29.0
≥3.1
Y28
370~400
3.7~4.0
175~210
≥2.20
180~220
≥2260
26.0~30.0
≥3.3
Y28H-1
380~400
3.8~4.0
240~260
≥3.02
250~280
≥3140
27.0~30.0
≥3.1
Y28H-2
360~380
3.6~3.8
271~295
≥3.40
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
3.8~4.0
230~275
≥2.89
235~290
≥2950
27.0~32.5
≥3.4
Y30H-2
395~415
3.95~4.15
275~300
≥3.46
310~335
≥3900
27.0~32.0
≥3.4
Y32
400~420
4.0~4.2
160~190
≥2.01
165~195
≥2070
30.0~33.5
≥3.8
Y32H-1
400~420
4.0~4.2
190~230
≥2.39
230~250
≥2890
34.5~35.0
≥4.0
Y32H-2
400~440
4.0~4.4
224~240
≥2.81
230~250
≥2890
31.0~34.0
≥3.9
Y33
410~430
4.1~4.3
220~250
≥2.76
225~255
≥2830
31.5~35.0
≥4.0
Y33H
410~430
4.1~4.3
250~270
≥3.14
250~275
≥3140
31.5~35.0
≥4.0
Y34
420~440
4.2~4.4
200~230
≥2.51
205~235
≥2580
32.5~36.0
≥4.1
Y35
430~450
4.3~4.5
215~239
≥2.70
217~242
≥2730
33.1~33.2
≥4.2
Y36
440~450
4.4~4.5
247~271
≥3.10
250~374
≥4400
35.1~38.3
≥4.4
Y38
440~460
4.4~4.6
285~305
≥3.58
294~310
≥3690
36.6~40.6
≥4.6
Y40
450~460
4.5~4.6
330~354
≥4.15
340~360
≥4270
37.6~41.8
≥4.7


Demagetization Curves of Permanent Ferrite Magnet


USA standard - permanent ferrite magnet industry standard of USA








Grade
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




Japan TDK standard









Grade
Composition
Br
HCB
HCJ
(BH)max






mT
kG
kA/m
kOe
kA/m
kOe
KJ/m3
MGOe
FB40
SrO6Fe2O3
410±10
4.1±0.1
234.8±11.9
2.95±0.15
238.7±15.9
3±0.2
31.4±1.6
3.95±0.2
FB3N
SrO6Fe2O3
395±15
3.95±0.15
234.8±11.9
2.95±0.15
238.7±15.9
3±0.2
28.7±2.4
3.6±0.3
FB3G
SrO6Fe2O3
375±15
3.75±0.15
254.6±15.9
3.2±0.2
270.6±19.9
3.4±0.25
25.9±2.4
3.25±0.3
FB3X
SrO6Fe2O3
375±15
3.75±0.15
234.8±11.9
2.95±0.15
238.7±15.9
3±0.2
25.9±2.4
3.25±0.3
FB1A
SrO6Fe2O3
220±15
2.2±0.15
159.2±15.9
2±0.2
258.6±19.9
3.25±0.25
8.9±1.6
1.1±0.2
FB5H
SrO6Fe2O3
405±15
4.05±0.15
298.4±11.9
3.75±0.15
322.3±11.9
4.05±0.15
31.1±1.6
3.9±0.2
FB4X
SrO6Fe2O3
420±10
4.2±0.1
234.8±11.9
2.95±0.15
238.7±15.9
3±0.2
33.4±1.6
4.2±0.2
FB4B
SrO6Fe2O3
400±10
4±0.1
254.6±11.9
3.2±0.2
262.6±19.9
3.3±0.25
30.3±1.6
3.8±0.2
FB4A
Sr/BaO6Fe2O3
410±10
4.1±0.1
175.1±15.9
2.2±0.2
176.7±15.9
2.22±0.2
31.8±1.6
4.0±0.2
FBGN
SrO6Fe2O3
440±10
4.4±0.1
258.6±11.9
3.25±0.15
262.6±11.9
3.3±0.15
36.7±1.6
4.6±0.2
FB6B
SrO6Fe2O3
420±10
4.2±0.1
302.4±11.9
3.8±0.15
318.3±11.9
4.0±0.15
33.4±1.6
4.2±0.2
FB6H
SrO6Fe2O3
400±10
4±0.1
302.4±11.9
3.8±0.15
358.1±11.9
4.5±0.15
30.3±1.6
3.8±0.2
FB6E
SrO6Fe2O3
380±10
3.8±0.1
290.5±11.9
3.65±0.15
393.9±11.9
4.95±0.15
27.5±1.6
3.45±0.2
FB5N
SrO6Fe2O3
440±10
4.4±0.1
256.8±11.9
2.85±0.15
259.2±11.9
2.88±0.15
36.7±1.6
4.6±0.2
FB5B
SrO6Fe2O3
420±10
4.2±0.1
262.6±11.9
3.3±0.15
266.6±11.9
3.35±0.15
33.4±1.6
4.2±0.2