Ferrimagnetic core materials for megahertz frequency high flux density transformers and inductors
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United States of America Patent
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May 6, 1997
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N/A
app pub date -
Sep 11, 1991
filing date -
Sep 11, 1991
priority date (Note) -
Expired
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Abstract
An improved NiZnCo ferrimagnetic core material which may further contain elements from the group Cr, Mn or Li. The invention permits enhancement of magnetic properties and results in core materials capable of efficient operation at high frequencies on the order of 1-100 MHz over a wide range of magnetic flux densities, on the order of 1-2500 Gauss. The composition of base NiZnCo ferrites are adjusted through ionic substitution. The magnetic properties of the ferrite are further enhanced through Bi.sub.2 O.sub.3 and SiO.sub.2 additions and controlled sintering. Methods of manufacturing the core material are also disclosed.
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