Toshiba Ceramics Co., Ltd.

Toshiba Ceramics., Ltd.

Yoshihisa Kato

Takashi Watanabe

Kazuhide Kawai

Masashi Fujimoto

Takumi Nishio

Satoshi Doro

Takafumi Nishibe

Takahiro Fukaya

A refractory composition which is suitable for forming a sliding gate to be used at the bottom of a ladle or tundish is provided. The refractory composition comprises 10 to 30 parts by weight of an alumina-magnesia spinel material containing 40 to 70% by weight of Al.sub.2 O.sub.3, 25 to 60% by weight of MgO and 10% or less of impurities, and 70 to 90 parts by weight of a magnesia material containing at least 90% by weight of MgO, wherein the composition contains 10 to 25% by weight of Al.sub.2 O.sub.3 and 75 to 90% by weight of MgO. 1 to 10 parts by weight of Al.sub.2 O.sub.3 material may be further added together with the alumina-magnesia spinel material and the magnesia material, to form the refractory composition.

Refractory composition

A tool for firing ceramics such as a setter and crucible comprises a ceramic foam body which has a three-dimensionally reticulated structure comprising plural interconnected ceramic strands, and a ceramic setting layer formed on at least one part of the surface of the ceramic foam body.

Tool for firing ceramics

Growing community of inventors

Kariya, Japan

Yoshihisa Kato