Zirconia based opacifiers

Details Zirconia based opacifiers Zirconia based opacifiers

C - Chemistry, Metallurgy

03

C

C03C 1/04 (2006.01)

Patent

CA 2165552

A process for producing a zirconia bearing opacifier is disclosed. The process comprises the steps of: (i) heat treatment of a zirconia bearing material comprising heating the zirconia bearing material in the presenoe of an additive to form a heat modified product having one or more phases which, when incorporated in a glaze and the glaze is fired, exhibit opacifying characteristics; and (ii) cooling the heat modified product to produce a product which can be used for imparting opacity.

L'invention se rapporte à un procédé de production d'un opacifiant à base de zircone. Ce procédé comprend les étapes suivantes: (i) traitement thermique d'un matériau contenant de la zircone comprenant le chauffage dudit matériau en présence d'un additif pour former un produit modifié à la chaleur ayant une ou plusieurs phases démontrant des propríétés opacifiantes lorsqu'on les incorpore dans un émail et qu'on cuit celui-ci; et (ii) refroidissement du produit modifié à la chaleur donnant un produit que l'on peut utiliser pour procurer de l'opacité à un émail.

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