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Magnetic Ceramics: II, Properties of Magnetite and Manganese Ferrite Fired in Various Atmospheres
Author(s) -
ECONOMOS GEORGE
Publication year - 1955
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1955.tb14948.x
Subject(s) - magnetite , manganese , ferrite (magnet) , materials science , ceramic , electrical resistivity and conductivity , mineralogy , metallurgy , composite material , chemistry , electrical engineering , engineering
Magnetite and manganese ferrite, fired in various atmospheres, were tested for initial a.‐c. permeability, for quasi‐static hysteresis characteristics of B m , B r , and H c , and for resistivity. Optimum properties were obtained for magnetite made under exactly controlled oxygen pressures and for manganese ferrite fired in a CO 2 atmosphere. These data are discussed with reference to the resistivity as affected by probable cation distribution.