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CALCINED FERRITE AND SINTERED FERRITE MAGNET AND ITS PRODUCTION METHOD
The present invention relates to sintered ferrite magnet having the composition of metallic elements of Ca, R, A, Fe and Co represented by the general formula: Ca_(1-x-y)R_xA_yFe_(2n-z)Co_z where R is at least one element among rare earth elements necessarily including La, A is Sr and/or Ba, x, y, z and n represent the atomic ratio of Ca, R, A, Fe and Co, 2n is a molar ratio represented by 2n = (Fe+Co)/(Ca+R+A), and x, y, z, n satisfy the conditions that 0.15 <= x <= 0.35, 0.05 <= y <= 0.40, (1-x-y) > y, 0 < z <= 0.18 and 7.5 <= (2n-z) < 11.0. Therefore, provided are a sintered ferrite magnet, a manufacturing method thereof and calcined ferrite capable of obtaining a sintered ferrite magnet wherein the sintered ferrite magnet has equal or superior magnetic properties while having the content of CO reduced.
Ca1-x-yRxAyFe2n-zCoz의 일반식으로 표시되는 Ca, R, A, Fe 및 Co의 금속 원소의 조성을 가지는 페라이트 소결 자석(여기서, R은 La를 필수적으로 포함하는 희토류 원소 중 적어도 1종이며; A는 Sr 및/또는 Ba이고; x, y, z 및 n은 Ca, R, A, Fe 및 Co의 원자비를 나타내며; 2n은 2n=(Fe+Co)/(Ca+R+A)로 표시되는 몰비이고; x, y, z 및 n은 0.15≤x≤0.35, 0.05≤y≤0.40, (1-x-y)>y, 0<11.0의 조건을 만족시킴).
CALCINED FERRITE AND SINTERED FERRITE MAGNET AND ITS PRODUCTION METHOD
The present invention relates to sintered ferrite magnet having the composition of metallic elements of Ca, R, A, Fe and Co represented by the general formula: Ca_(1-x-y)R_xA_yFe_(2n-z)Co_z where R is at least one element among rare earth elements necessarily including La, A is Sr and/or Ba, x, y, z and n represent the atomic ratio of Ca, R, A, Fe and Co, 2n is a molar ratio represented by 2n = (Fe+Co)/(Ca+R+A), and x, y, z, n satisfy the conditions that 0.15 <= x <= 0.35, 0.05 <= y <= 0.40, (1-x-y) > y, 0 < z <= 0.18 and 7.5 <= (2n-z) < 11.0. Therefore, provided are a sintered ferrite magnet, a manufacturing method thereof and calcined ferrite capable of obtaining a sintered ferrite magnet wherein the sintered ferrite magnet has equal or superior magnetic properties while having the content of CO reduced.
Ca1-x-yRxAyFe2n-zCoz의 일반식으로 표시되는 Ca, R, A, Fe 및 Co의 금속 원소의 조성을 가지는 페라이트 소결 자석(여기서, R은 La를 필수적으로 포함하는 희토류 원소 중 적어도 1종이며; A는 Sr 및/또는 Ba이고; x, y, z 및 n은 Ca, R, A, Fe 및 Co의 원자비를 나타내며; 2n은 2n=(Fe+Co)/(Ca+R+A)로 표시되는 몰비이고; x, y, z 및 n은 0.15≤x≤0.35, 0.05≤y≤0.40, (1-x-y)>y, 0<11.0의 조건을 만족시킴).
CALCINED FERRITE AND SINTERED FERRITE MAGNET AND ITS PRODUCTION METHOD
하소 페라이트, 및 페라이트 소결 자석 및 그 제조 방법
TANIOKU YASUAKI (author) / YOSHIMITSU YUSHI (author) / KOBAYASHI YOSHINORI (author)
2021-10-05
Patent
Electronic Resource
Korean
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