Mitsui Minings & Melting Co., Ltd.

Akira Oyama

Keiichi Kagawa

Masachika Hashiuchi

Tadashi Yamanishi

Yoshiaki Tanino

Mitsuo Shinoda

Makoto Matsuo

Kouji Morita

Seiji Fuchino

Zinc alloy powder for alkaline batteries containing Bi at a rate of 0.01-0.1% by weight, In at a rate of 0.01-0.1% by weight, Mg at a rate of 0.0005-0.03 % by weight and unavoidable impurities, such as Pb, Cd and Cu, capable of improving high-rate performance and being suitable for using as a cathode active substance for alkaline batteries is provided.

Zinc alloy powder and alkaline battery using the same

This invention provides magnetite particles containing a silicon component inside and also a silicon component exposed on the surface of each particle, which are improved in the properties of electrical resistance, remanent magnetization, and fluidity in a well-balanced way and suited for use principally as powdery material for magnetic toner for electrostatic copying and as black pigment powder for coating materials; and also relates to a process for producing the particles.

Magnetite particles

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Shimonoseki, Japan

Akira Oyama