Sintered and doped product based on zircon + nb2o5 or ta2o5

Details Sintered and doped product based on zircon + nb2o5 or ta2o5 Sintered and doped product based on zircon + nb2o5 or ta2o5

C - Chemistry, Metallurgy

04

B

C04B 35/48 (2006.01) C03B 5/43 (2006.01) C04B 35/622 (2006.01)

Patent

CA 2666449

Sintered product produced from a starting charge containing 75 to 99% zircon, and having the following average chemical composition by weight, the percentages by weight being based on the oxides: 60% < ZrO2 + HfO2 < 75%; 27%.< SiO2 < 34%; O < TiO2; O < Y2O3 < 3.5%; 0.1 % < Nb2O5 + Ta205 <= 5%; and other oxides: < 1,5 %; for a total of 100%. Use in a glass furnace.

L'invention porte sur un produit fritté obtenu à partir d'une charge de départ contenant 75 à 99 % de zircon, et ayant la composition chimique moyenne suivante en poids, les pourcentages en poids étant basés sur les oxydes : 60 % < ZrO2 + HfO2 < 75%; 27 % < SiO2 < 34 %; O < TiO2; O < Y2O3 < 3,5 %; 0,1 % < Nb2O5 + Ta2O5 <= 5 %; et d'autres oxydes : < 1 %; pour un total de 100 %. L'invention concerne en outre une utilisation dans un four à verre.

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