The formation of the Cd-bearing ferrite by the air oxidation of an aqueous suspension.

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概要

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• When the Cd<SUP>2+</SUP>/Fe<SUB>total</SUB> ratio in the initial solution is below 0.1, almost all cadmium ions are incorporated into the ferrite with the spinel-type structure by the air oxidation of an aqueous suspension at a pH 9.0 and at 65 °C. The Cd-bearing ferrite thus obtained is a ferromagnet and is oxidized to form a completely oxidized Cd-bearing ferrite at 150 °C in the air; this ferrite is still a ferromagnet and belongs to the Fe<SUB>2</SUB>O<SUB>3</SUB>–CdFe<SUB>2</SUB>O<SUB>4</SUB> binary system, with the same spinel type structure. When the Cd<SUP>2+</SUP>/Fe<SUB>total</SUB> ratio in the initial solution increases to 0.5, the crystalline phases formed is complicatedly changed; the products are also significantly affected by the pH value of the suspension. The most favorable pH value at 65 °C to form the Cd-bearing ferrite is proposed to be 10.0.

• 公益社団法人 日本化学会の論文

著者

• Tamaura Yutaka

  Department Of Chemistry Tokyo Institute Of Technology

• KATSURA Takashi

  Department of Chemistry

• KANZAKI Tadao

  Department of Chemistry, Tokyo Institute of Technology

• Kanzaki Tadao

  Department Of Chemistry Tokyo Institute Of Technology

• Takei Katsumori

  Department of Chemistry, Tokyo Institute of Technology

• Kaneko Ken

  Department of Chemistry, Tokyo Institute of Technology

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