FERRITE SINTERED MAGNET, FERRITE PARTICLES, BONDED MAGNET, AND ROTATING ELECTRICAL MACHINE
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United States of America Patent
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Issued Date -
May 19, 2022
app pub date -
Mar 27, 2020
filing date -
Mar 27, 2020
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Abstract
A ferrite sintered magnet has a ferrite phase having a magnetoplumbite-type crystal structure, and contains at least a metal element A, a metal element R, Fe, Co, Zn, and B. The element A is at least one kind of element selected from the group consisting of Sr, Ba, Ca, and Pb, and essentially includes Ca. The element R is at least one kind of element selected from the group consisting of Bi and rare-earth elements including Y, and essentially includes La. Atomic ratios of the metal elements satisfy the following expressions.
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