首頁 > 產品資料 > 注塑釹鐵硼磁  
 


把釹鐵硼合金粉末與樹脂(PA12, PPS),添加劑等混合後, 以注射成

形的方式生産出來的磁體就是注塑釹鐵硼磁石。 注塑釹鐵硼具有體

積小,磁性能高的優點,尤其是一些薄壁磁環,  複雜形狀的精密磁

部件等,許多壓制及燒結釹鐵硼無法達到的尺寸精度都能用注塑成

型生産。由於電機的發展越來越趨向微細化,特別是無刷電機,對尺

寸,磁性能,穩定性等都有很高的要求,因此注射成形釹鐵硼磁體

最能滿足這些條件。
 
 
Magnetic Characteristics & other physical characteristics of Injection Molded NdFeb Magnet- END series

EARTH MAGNETS-EPF- END Series
Test method
Unit
END-352K
END-372K
END-392K
END-502K
END-392C
END-502C
END-602C
END-702C
END-364
END-374
END-
1102
www.earthmagnets.com
Magnetic power
-
-
Nd-Fe-B alloy
Base resin
 
 
PA12
MAGNETIC PROPERTIES
-
-
Isotropic
Anisotropic
Residual flux densityBr
 
mT
450
490
540
590
550
590
640
680
450
500
720
Coercive forcebHc
 
kA/m
310
330
350
370
340
370
390
410
290
310
477
Intrinsic coercive forceiHc
 
kA/m
680
680
670
690
690
690
690
690
710
710
987
Maximum energy productBHmax
 
kJ/m3
36
42
48
56
49
56
64
72
36
40
90
Thermal coefficientΔBr/Br
 
%/℃
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
Thermal coefficientΔHc/Hc
 
%/℃
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
OTHER PROPERTIES
 
 
 
 
 
 
 
 
 
 
 
 
 
Tensile strength
ASTM D-638
MPa
46
42
40
37
45
43
37
35
42
35
-
Flexural strength
ASTM D-790
MPa
98
93
85
75
95
92
80
70
82
70
70
Flexural modulus
ASTM D-790
MPa
9500
12000
15000
17500
11000
12000
17500
19000
21000
22000
12859
Izod impact (with notch)
ASTM D-256
J/m
42
42
40
40
41
41
40
40
42
40
39
Rockwell hardness coefficient
ASTM D-785
R scale
105
108
110
110
108
110
110
110
117
120
108
Heat deflection temperature1.82Mpa
ASTM D-648
0 C
130
135
150
153
145
150
153
155
215
217
155
Specific gravity
ASTM D-792
-
4.7
5.0
5.4
5.7
5.0
5.4
5.7
5.9
4.6
5.0
5.3
Water absorption (230C 24 hrs in water)
ASTM D-570
%
0.06
0.05
0.04
0.04
0.04
0.04
0.04
0.04
0.01
0.01
-
Molding shrinkage coefficient 
DIC Method
%
0.5
0.5
0.5
0.4
0.5
0.4
0.4
0.4
0.4
0.4
0.4
Coefficient of thermal expansion
DIC Method
0 C
6.1X10-5
5.2X10-5
4.0X10-5
3.7X10-5
5.2X10-5
4.0X10-5
3.7X10-5
3.7X10-5
3.2X10-5
3.0X10-5
3.7X10-
5
Melt flow rate (2700C x 5 kg)   
ASTM D-1238
g/10min
600
500
300
200
500
300
200
150
 -
 -
160
Melt flow rate (2700C x 10 kg)   
ASTM D-1238
g/10min
 -
 - 
 -
 -
 -
 -
 -
 -
110
70
-