Sintered materials produced from zircon and zirconia
AssigneeSociete Europeenne des Produits Refractaires
InventorsJacques Marius Louis Guigonis, Eric Thierry Georges Jorge, Charles Nicholas McGarry
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Abstract
The invention relates to a novel sintered material, characterized in that it is produced from a batch containing 5 to 40% zircon and in that it has the following chemical composition in % by weight: ______________________________________ ZrO.sub.2 + HfO.sub.2 82-96 SiO.sub.2 1.7-14 TiO.sub.2 0.2-3 Y.sub.2 O.sub.3 0.4-5 Al.sub.2 O.sub.3 0.2-2.5 Others <1 ______________________________________
Claims9
A sintered material that is produced from a batch containing 5 to 40% zircon and that has the following chemical composition in % by weight:
- ______________________________________ ZrO.sub.2 + HfO.sub.2 82-96 SiO.sub.2 1.7-14 TiO.sub.2 0.2-3 Y.sub.2 O.sub.3 0.4-5 Al.sub.2 O.sub.3 0.2-2.5 Others <1 ______________________________________
A process of making a shaped body of sintered material, which comprises the following steps:
- a) preparing a sinterable batch containing 5 to 40% by weight of zircon and comprising by weight, on the oxide basis, 82-96% of ZrO.sub.2 +HfO.sub.2, 1.7-14 of SiO.sub.2, 0.2-3% of TiO.sub.2, 0.4-5% of Y.sub.2 O.sub.3, 0.2-2.5% of Al.sub.2 O.sub.3, and <1 of others;
- b) forming said batch into a green shape, and
- c) firing the resultant green shape to a temperature in the range of about 1400.degree. C. and 1650.degree. C. for a time sufficient to sinter the green shape.
Dependencies are inferred from the claim text.