Tdk Corporation

Jo Sato

Hitoshi Taguchi

Junnichi Nagaoka

Yuichi Sugawara

Shogo Muroya

Junichi Nagaoka

Masashi Ohmura

Takuma Abe

A ferrite sinter 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 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 (1) to (5),ARFeCoZn  (1)0.40≤≤0.70  (2)8.20≤≤9.34  (3)0.05≤≤0.50  (4)0<≤0.20  (5) The content of Si is 0 to 0.60% by mass in terms of SiO, and the content of B is 0.1-0.70% by mass in terms of BO.

Ferrite sintered magnet, ferrite particles, bonded magnet, and rotating electrical machine

Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by RAFeCo, where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba. The content of B in the ferrite sintered magnet is from 0.1% to 0.6% by mass in terms of BO.0.2≤≤0.8  (1)0.1≤≤0.65  (2)3≤≤14  (3)

Ferrite sintered magnet, ferrite particles, bonded magnet, motor, and generator

Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by RAFeCo, where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba. The content of B in the ferrite sintered magnet is from 0.1% to 0.6% by mass in terms of BO.0.2&#x2264;&#x2264;0.8&#x2003;&#x2003;(1)0.1&#x2264;&#x2264;0.65&#x2003;&#x2003;(2)3&#x2264;&#x3c;14&#x2003;&#x2003;(3)

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Jo Sato