異方性Ba-フェライト磁石の焼結性に及ぼす原料酸化鉄中の微量成分の影響に関する考察
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概要
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Ferric iron oxides made from pyritic ore differ from the conventional other ferric oxides in a content of the impurities, such as CuO, ZnO, SiO<SUB>2</SUB>, CaCO<SUB> 3</SUB>. Al<SUB>2</SUB>O<SUB>3</SUB> and MnO, and in the firing condition of producing ferrite magnet. The purpose of the present paper is to show how the kind and/or the amount of these impu-rities effects on the firing condition. It was found that an addition of CuO, ZnO, or CaCO<SUB> 3</SUB>. accelerates the sintering rate, while an addition of MnO, SiO<SUB>2</SUB> or Al<SUB>2</SUB>O<SUB>3</SUB> retards that rate. (BH)max performance was not so much affected by the addition of CuO, ZnO or MnO, and it was reduced by the addition of the rest of additives.
- 社団法人 粉体粉末冶金協会の論文