Compositions – Magnetic – Iron-oxygen compound containing
Patent
1979-08-08
1981-01-20
Cooper, Jack
Compositions
Magnetic
Iron-oxygen compound containing
252 6259, 252 6262, C04B 3538
Patent
active
042461286
ABSTRACT:
Desirable properties of manganese zinc ferrites are obtained without the need for controlling or changing the oxygen partial pressure during the sintering and cooling steps by adding a small amount of germanium or gallium to the ferrite and using an atmosphere, such as air, during the sintering and cooling steps, that has at least 1 percent oxygen by volume.
REFERENCES:
patent: 2565861 (1951-08-01), Leverenz
patent: 3415751 (1968-12-01), Hirota et al.
patent: 3843541 (1974-10-01), Chiba et al.
Petri. et al., "Amer. Ceramic Soc. Conf.," pp. 2-5, 1977.
Hirota, "Japanese J. of Appl. Phys.," 5, pp. 1125-1131, 1966.
Gallagher Patrick K.
Gyorgy Ernst M.
Johnson, Jr. David W.
Robbins Murray
Bell Telephone Laboratories Incorporated
Cooper Jack
Laumann Richard D.
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