Process for the preparation of yttrium-stabilized zirconia, and product so obtained

L'invention a trait à un procédé de préparation d'une poudre fine de zircone stabilisée à l'yttrium essentiellement sous la forme quadratique, ledit procédé étant caractérisé en ce qu'il comprend les étapes suivantes : a) on prépare un mélange aqueux d'acétate de zirconyle e...

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Hauptverfasser: PARIS, RENE, SAMDI, AZZEDINE, ROUBIN, MARC
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SAMDI, AZZEDINE
ROUBIN, MARC
description L'invention a trait à un procédé de préparation d'une poudre fine de zircone stabilisée à l'yttrium essentiellement sous la forme quadratique, ledit procédé étant caractérisé en ce qu'il comprend les étapes suivantes : a) on prépare un mélange aqueux d'acétate de zirconyle et d'acétate d'yttrium, b) on amène le pH dudit mélange à une valeur au moins égale à 5, c) on élimine le solvant dudit mélange, d) on pyrolyse le résidu solide obtenu à l'issue de l'étape c). Elle concerne également les produits obtenus par ledit procédé. Process for the preparation of an yttrium-stabilised fine zircon powder essentially in the tetragonal form, the said process being characterised in that it comprises the following stages: a) an aqueous mixture of zirconyl/acetate and yttrium acetate is prepared, b) the pH of the said mixture is brought to a value of at least 5, c) the solvent is removed from the said mixture, d) the solid residue obtained at the end of stage c) is pyrolysed. The invention also relates to the products obtained by the said process.
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Elle concerne également les produits obtenus par ledit procédé. Process for the preparation of an yttrium-stabilised fine zircon powder essentially in the tetragonal form, the said process being characterised in that it comprises the following stages: a) an aqueous mixture of zirconyl/acetate and yttrium acetate is prepared, b) the pH of the said mixture is brought to a value of at least 5, c) the solvent is removed from the said mixture, d) the solid residue obtained at the end of stage c) is pyrolysed. 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Elle concerne également les produits obtenus par ledit procédé. Process for the preparation of an yttrium-stabilised fine zircon powder essentially in the tetragonal form, the said process being characterised in that it comprises the following stages: a) an aqueous mixture of zirconyl/acetate and yttrium acetate is prepared, b) the pH of the said mixture is brought to a value of at least 5, c) the solvent is removed from the said mixture, d) the solid residue obtained at the end of stage c) is pyrolysed. 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Elle concerne également les produits obtenus par ledit procédé. Process for the preparation of an yttrium-stabilised fine zircon powder essentially in the tetragonal form, the said process being characterised in that it comprises the following stages: a) an aqueous mixture of zirconyl/acetate and yttrium acetate is prepared, b) the pH of the said mixture is brought to a value of at least 5, c) the solvent is removed from the said mixture, d) the solid residue obtained at the end of stage c) is pyrolysed. The invention also relates to the products obtained by the said process.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record>
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language eng ; fre ; ger
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subjects ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
title Process for the preparation of yttrium-stabilized zirconia, and product so obtained
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