|
Sintered Ferrite Magnet was
developed since 1960s. It is
manufactured from Oxide
material by Powder
metallurgical process.
According to the difference
in molding process, it can
be divided into Dry Type and
Wet Type ferrite magnets.
According to the inner
structure of the material,
it can be divided into
Anisotropic Ferrite Magnet
and Isotropic Ferrite
Magnet. It is considered a
fundamental magnetic
material, for it is widely
used in many fields owing to
its good magnetic
performance and the low cost
of its raw material. In
various applications, it can
not be replaced, although
many new magnetic materials
came out in recent years.
Hard Ferrite magnets have
excellent corrosion
resistance and have normal
operating capabilities
between -40°C and +250°C. As
temperature
increases,remanence
decreases by 0.2%/°C whereas
coercivity increases by
0.3%/°C. At very low
temperatures there is a risk
of permanent demagnetization
in magnet systems with low
working points.
We have a wide variety of
standard parts, and we
welcome the opportunity to
quote on your specific
requirements.
Chinese grade for
sintered ferrite magnets
|
Grade |
Br
mT KG |
Hcb
KA/m KOe |
Hcj
KA/m KOe |
(BH)max KJ/m3
MGOe |
Equivalent to
Former standard |
|
Y8T |
200-235 2.0-2.35 |
125-160 1.57-2.01 |
210-280 2.64-3.52 |
6.5-8.5 0.8-1.2 |
Y10T |
|
Y20 |
320-380 3.2-3.8 |
135-190 1.70-2.58 |
140-195 1.76-2.45 |
18.0-22.0 2.3-2.8 |
Y20 |
|
Y22H |
310-360 3.1-3.6 |
220-250 2.77-3014 |
280-320 3.52-4.02 |
20.0-24.0 2.5-3.0 |
|
|
Y23H |
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 |
Y25 |
|
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 |
|
Y30H-1 |
380-400 3.8-4.0 |
230-275 2.89-3.46 |
235-290 2.95-3.65 |
27.0-32.5 3.4-4.1 |
Y30BH |
|
Y30H-2 |
395-415 3.95-4.15 |
275-300 3.46-3.77 |
310-335 3.90-4.21 |
28.5-32.0 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 |
Y35 |
|
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/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 |
Europe standard
The
standard from International
Electronics
Committee(IEC404-8-1)
|
Grade |
Allowed Value
(min/typical)
|
|
Br |
Hcb(BHC) |
Hcj(IHC) |
(BH)max |
|
MT |
KG |
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 |
Physical Characteristics
|
Curie Temperature |
°C |
450 |
|
Maximum Working
Temperature |
°C |
250-280 |
|
Recoil Permeability |
µrec |
1.05-1.30 |
|
Temperature
Coefficient of Br |
%/°C |
-0.18 |
|
Temperature
Coefficient of Hc |
%/°C |
0.2-0.5 |
|
Deflection Strength |
Kgf/mm2 |
5-9 |
|
Compressive Strength |
Kgf/mm2 |
>70 |
|
Tensile Strength |
Kgf/mm2 |
2-5 |
|
Density |
g/cm3 |
4.7-5.1 |
|
Hardness |
HV |
480-580 |
|
Electric Resistivity |
KOcm |
>104 |
 |
