|
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 |
 |
*/
