Toshiba Ceramics Co., Ltd.

Toyokazu Matsuyama

Takashi Suzuki

Kazuhide Kawai

Makoto Takahashi

Shunzo Shimai

Masahiko Ichishima

Hideo Uemoto

Fumio Tokuoka

Hiroaki Shitara

The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.

Ceramic member with fine protrusions on surface and method of producing the same

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Kanagawa, Japan

Toyokazu Matsuyama