ALUMINA-BASED COMPOSITE CERAMIC AND ITS PRODUCTION

ALUMINA-BASED COMPOSITE CERAMIC AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To obtain an alumina-based composite ceramic having a fracture strength and a fracture toughness hardly being lowered even at >=1,400 deg.C, and usable as a functional material at a high temperature. SOLUTION: This alumina-based composite ceramic is obtained by dispersing a...

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Hauptverfasser: HANEDA HAJIME, NOZAWA TOSHITERU, NISHIMURA SATOYUKI, TANAKA HIDEHIKO
Format: Patent
Sprache:eng
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ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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creator HANEDA HAJIME
NOZAWA TOSHITERU
NISHIMURA SATOYUKI
TANAKA HIDEHIKO
description PROBLEM TO BE SOLVED: To obtain an alumina-based composite ceramic having a fracture strength and a fracture toughness hardly being lowered even at >=1,400 deg.C, and usable as a functional material at a high temperature. SOLUTION: This alumina-based composite ceramic is obtained by dispersing a yttria-alumina composite fiber in a matrix of a polycrystal α-alumina. A mixed aqueous solution of yttrium ion and aluminum ion in a YAG composition is precipitated by a homogeneous precipitation method. Acetic acid and an organic binder is added to the product, and the obtained mixture is spun and baked to provide the yttria-alumina composite fiber. The obtained yttria-alumina composite fiber is mixed with an alumina slurry, and the resultant material is compacted and baked to provide the objective alumina-based composite ceramic.
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subjects ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
title ALUMINA-BASED COMPOSITE CERAMIC AND ITS PRODUCTION
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