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Back to Materials Materials: Powdered Iron
material
characteristics: |
| property |
initial
perm-
eability |
temp.
stability
(-55 to +125C) |
particle
size |
density |
recommended
frequency |
features |
| unit |
ui |
ppm/ C |
µm |
g/cc |
MHz |
|
| symbol |
|
|
|
D |
f |
|
| 3120 |
8.5 |
35 |
1 - 3 |
5.0 |
10 - 200 |
carbonyl iron, higher Q at hi freq. (vs. CTM3118),
high cost |
| 3118 |
9 |
30 |
2 - 4 |
5.0 |
1 - 60 |
carbonyl iron, higher Q at hi freq. (vs. CTM3976),
high cost |
| 3976 |
10 |
95 |
3 - 5 |
5.0 |
0.1 - 40 |
carbonyl iron, high Q, most widely used, moderate
cost |
| 3900 |
20 |
280 |
7 - 9 |
6.5 |
0.05 - 10 |
reduced carbonyl iron, high Q, < 1 MHz, high
permeability, high cost |
| 3908 |
35 |
255 |
5 - 7 |
6.5 |
0.05 - 2 |
reduced carbonyl iron, medium Q, high permeability,
high cost |
| 3866 |
60 |
950 |
11 - 13 |
6.1 |
0.06- 50 |
annealed sponge iron, high permeability, low
Q, low cost |
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