Porous alumina fabrication procedures
AssigneeJapan as represented by Secretary of Agency of Industrial Science and Technology
InventorsTatsuki Ohji, Zhen-Yan Deng
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Abstract
This invention relates to a method of producing an alumina porous material using a mixed powder of alumina powder and aluminum hydroxide represented by the chemical formula Al(OH)3 at different percentages as the starting material, comprising the steps of heating this mixed powder to decompose the aluminum hydroxide and further heat treating it within a temperature range of 1,000 to 1,600° C., and to the alumina porous material produced by the above-mentioned method with a porosity exceeding 40 volume % and its specific surface area of 8 to 40 m2/g, and further to a filter and catalyst carrier that are obtained using this alumina porous material.
Claims7
A method of producing an alumina porous material, the method comprising
- molding a mixed powder comprising alumina powder and Al(OH)3 as a starting powder to form a molded article;
- heating the molded article to decompose a portion of the Al(OH)3;
- and
- further calcinating the molded article at a temperature in a range of from 1,000 to 1,600° C. to produce the alumina porous material, wherein the powder contains
- alumina as the main component,
- aluminum hydroxide, and,
- optionally, 1 to 20 volume % of zirconia.
Dependencies are inferred from the claim text.