Toshiba Ceramics Co., Ltd.

Tadashi Kimura

Hiroshi Okada

Shigeki Niwa

Toshiyuki Suzuki

Mamoru Uemura

Ataru Nishikawa

Kenithi Urathuji

The present invention has been achieved by a material for a sintering appliance which comprises a base material comprising alumina&times;silica containing from 65 to 95% by weight of Al,O,having formed on the surface thereof a flame-coated film comprising ZrO,and CaO as main components, wherein the content of CaO is from 23 to 30% by weight based on the weight of the ZrO,and CaO, the mineral composition of the main components of the coated film is calcium zirconate. Preferably the difference of thermal expansion between the base material and the flame-coated film is 0.3% or more at 1,200&deg; C.

Material for sintering appliance

A calcining tool material, comprising a flame-spray zirconia coating layer made of unstabilized zirconia and stabilized or partially-stabilized zirconia in admixture, formed on the surface of an alumina-silica-based substrate having an Al.sub.2 O.sub.3 content of not less than 65% by weight.

Calcining tool material and method of fabricating thereof

The present invention has been achieved by a material for a sintering appliance which comprises a base material comprising alumina.times.silica containing from 65 to 95% by weight of Al.sub.2 O.sub.3 having formed on the surface thereof a flame-coated film comprising ZrO.sub.2 and CaO as main components, wherein the content of CaO is from 23 to 30% by weight based on the weight of the ZrO.sub.2 and CaO, the mineral composition of the main components of the coated film is calcium zirconate. Preferably the difference of thermal expansion between the base material and the flame-coated film is 0.3 or more at 1,200.degree. C.

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Kanagawa, Japan

Tadashi Kimura