Stress stabilized ferrimagnetic material and method of...

Details Stress stabilized ferrimagnetic material and method of... Stress stabilized ferrimagnetic material and method of...

2007-11-20

2007-11-20

Koslow, C. Melissa (Department: 1755)

Compositions

Magnetic

Iron-oxygen compound containing

C264S611000, C264S232000, C264S233000, C264S340000, C264S341000

Reexamination Certificate

active

10916034

ABSTRACT:
A stress stabilized ferrimagnetic material has a retained stress to provide enhanced initial permeability stability over a range of operating temperatures, such as from −40° C. to 85° C., as well as pressures. Stress is introduced into the ferrimagnetic material, wherein subsequent processing relieves only a portion of the induced stress, and preferably less than 50% of the induced stress.

REFERENCES:
patent: 5645774 (1997-07-01), Reczek et al.
patent: 5648015 (1997-07-01), Reczek
patent: 6056890 (2000-05-01), Cai et al.
Erich Roess, Magnetic Properties and Microstructure of High-Permeability Mn—Zn Ferrites, FERRITES: Proceedings of the International Conference, Jul. 1970, pp. 203-209, Japan.
Effect of Divalent Ion Variation, Chemical Aspects of Ferrites, at least as early as Aug. 11, 2004, pp. 95-96.
1) Ferrite Kilns and 2) Firing of Microwave Ferrites and Garnets, Modern Ferrite Technology, Ferrite Processing, at least as early as Aug. 11, 2004, pp. 172-175.

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