Doped sintered produced based on zircon and zirconia

Details Doped sintered produced based on zircon and zirconia Doped sintered produced based on zircon and zirconia

C - Chemistry, Metallurgy

04

B

C04B 35/482 (2006.01) C04B 35/48 (2006.01)

Patent

CA 2673072

The invention relates to a sintered product made from a starting charge containing 5 to 50% zircon and having the following chemical composition, in percentages by weight on the basis of the oxides and for a total of more than 100%: silica and zirconia, the concentration of zirconia (ZrO2) being equal to at least 64%; at least 0.2% of a dopant selected from among V2O5, Nb2O5, Ta2O5 and mixtures thereof; optionally a stabiliser selected from among Y2O3, MgO, CaO, CeO2 and mixtures thereof, at a concentration less than or equal to 6%; and "other oxides" at a concentration less than or equal to 6.7%.

Produit fritté élaboré à partir d une charge de départcontenant 5 à 50% de zircon, et présentant la composition chimique moyennesuivante, en pourcentages massiques sur la base des oxydes et pour un total de 100% : de la silice et de la zircone, la teneur en zircone (ZrO2) étant au moins égale à 64%; au moins 0,2% d'un dopant choisi parmi V2O5, Nb2O5, Ta2O5, et leurs mélanges; optionnellement un stabilisant choisi parmi Y2O3, MgO, CaO, CeO2, et leurs mélanges, à une teneur inférieure ou égale à 6%; des <=autres oxydes>= à une teneur inférieure ou égaleà 6,7%.

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