Sr Sr Sr METHOD FOR MANUFACTURING Sr FERRITE PARTICLE FOR SINTERED MAGNET METHOD FOR USING Sr FERRITE PARTICLE Sr FERRITE SINTERED MAGNET AND METHOD FOR MANUFACTURING SAME AND MOTOR AND GENERATOR

摘要

An iron compound, a strontium compound, and an alkaline metal compound having at least one element selected from the group consisting of K and Na as constituent elements and having no Cl and S as constituent elements to prepare a mixture, And a calcination step of obtaining Sr ferrite particles having an average primary particle diameter of 0.2 to 1.0 占 퐉 by firing at 1100 占 폚. In the mixing step, the alkali metal compound is added to the total of the iron compound powder and the strontium compound powder So that the total of K and Na is 0.03 to 1.05% by mass in terms of K ₂ O and Na ₂ O, based on the total mass of the Sr ferrite particles for sintered magnets.