Ferrite magnetic material

Details Ferrite magnetic material Ferrite magnetic material

2011-04-05

2011-04-05

Koslow, C. Melissa (Department: 1734)

Compositions

Magnetic

Iron-oxygen compound containing

C252S062620, C252S062570

Reexamination Certificate

active

07919007

ABSTRACT:
The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br+(⅓)HcJ is 6200 or more even by sintering at a temperature of 1150° C. or lower. The ferrite magnetic material includes as a main phase thereof a ferrite phase having a hexagonal structure, the main phase being represented by the following composition formula (1): LaxCamα1−x−m(Fe12−yCoy)zwith α representing one or two of Ba and Sr; wherein the constituent ratios of the metal elements constituting the main phase satisfy the following conditions: x and m are the values in a region bounded by the points, A: (0.53, 0.27), B: (0.64, 0.27), C: (0.64, 0.35), D: (0.53, 0.45), E: (0.47, 0.45) and F: (0.47, 0.32) in the (x, m) coordinates shown in FIG.2; 1.3≦x/yz≦1.8; and 9.5≦12z≦11.0.

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