Method for the production of carbonyl iron containing magnetic d

Details Method for the production of carbonyl iron containing magnetic d Method for the production of carbonyl iron containing magnetic d

1974-03-25

1976-04-27

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 3155, 148103, 148108, H01F 102

Patent

active

039532518

ABSTRACT:
Carbonyl iron powder core (dust core) materials whose rate of change of magnetic permeability with temperature are preselected, are produced by a process which includes the mixing together of powders from two source batches. These source batches produce core materials whose temperature coefficients, Y and Z, lie on either side of the desired temperature coefficient, X. The fraction, A, of the Y powder is selected in accordance with the formula:

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patent: 2971872 (1961-02-01), Dunton et al.
patent: 2999275 (1961-09-01), Blume
patent: 3120698 (1964-02-01), Elliott
patent: 3348982 (1967-10-01), Dunton
patent: 3498918 (1970-03-01), Copp
patent: 3502584 (1970-03-01), Denes

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