島根大学論集. 自然科学

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島根大学論集. 自然科学 15
1965-12-25 発行

録音材料酸化金属の整法

On the Preparations Magnetic Metal-Oxides(I) : Solubilities of Sand-iron in Acids,and their Oxidation by Air-Blow
Yamamoto, Sakujirou
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Description
For the preparations of ferric oxide and ferrousferric oxide as the primary materials for ferrite magnets and magnetic metal-oxide for tape recording, the fine sand-iron and the special spongy-iron produced at TORIGAMI BRANCH FACTORY and at the METALLUGICAL LABORATORY of HITACHI-INZOKU Co., YASUGl are used respectively. The distributions of the particle-sizes of sand-iron, the iron contents by each grade of their particle-sizes, the solubilities of sand-iron and spongy-iron in hydrochloric acid and sulphuric acid, and then the effects of temperature on them are fundamentally researched.