Inorganic oxide
AssigneeSumitomo Chemical Company, Limited
InventorsYoshitaka Kawakami, Hiroyuki Ando
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Abstract
Provided is a powder inorganic oxide containing Al, Ce and Zr as constituent elements, that affords a molded product with a density of 1.0 to 1.3 g/ml by placing 4.0 g of the inorganic oxide in a cylindrical container having diameter 20 mm and performing uniaxial molding under conditions of room temperature and pressure of 29.4 MPa for 30 sec., and achieves an average shrinkage percentage of not more than 14.0% as calculated by the following formula: average shrinkage percentage (%)=100×{(1−(c)/(a))+(1−(d)/(b))}/2 wherein each symbol is as defined in the DESCRIPTION.
Claims8
A powder inorganic oxide comprising Al, Ce and Zr as constituent elements,
- wherein a molded product, which is produced by placing 4.0 g of the inorganic oxide in a cylindrical container having a diameter of 20 mm and performing uniaxial molding under conditions of room temperature and pressure of 29.4 MPa for 30 sec., has a density of 1.0 to 1.3 g/ml and
- wherein an average shrinkage percentage calculated by the following formula is not more than 14.0%:
- average shrinkage percentage (%)=100×{(1−(c)/(a))+(1−(d)/(b))}/2,
- wherein (a) and (b) respectively represent a diameter and a height of the molded product, and (c) and (d) respectively represent a diameter and a height of a calcined product obtained by heating the molded product from room temperature to 1300° C. under an air atmosphere at a temperature-rising rate of 200° C./hr., maintaining the product at 1300° C. for 2 hr., and lowering the temperature thereof from 1300° C. to room temperature at a temperature-decreasing rate of 200° C./hr.
Dependencies are inferred from the claim text.