SiO2/Al2O3 composite abrasive and method for producing the same
AssigneeEverlight USA, Inc.
InventorsRu-Shi Liu, Sung-Chun Chang
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Abstract
An SiO2/Al2O3 composite abrasive is disclosed, which has positive surface charges when dispersed in an alkaline water solution. This SiO2/Al2O3 composite abrasive includes an Al2O3 core and SiO2 coated thereon. The abrasive of the present invention is suitable for polishing metal, compact disks, optical lenses, and semiconductors etc in a high-pH environment. A method for producing the SiO2/Al2O3 composite abrasive is also disclosed in the present invention.
Claims14
A method for producing an SiO2/Al2O3 composite abrasive, said SiO2/Al2O3 composite abrasive having positive surface charges when dispersed in an alkaline water solution;
- and said method comprising mixing an Al2O3 abrasive and a SiO2 precursory material in alcohol to form a mixture;
- and then reacting said mixture with an acidic solution.
Dependencies are inferred from the claim text.