Polishing abrasive of crystalline ceric oxide particles having surfaces modified with hydroxyl groups
US6372003B1 · kind B1 · utility
16Cited by
15References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Jul 9, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
According to the present invention, a process is provided for producing crystalline ceric oxide particles having a particle diameter of 0.005 to 5 &mgr;m, which comprises the steps of reacting a cerium (III) salt with an alkaline substance in an (OH)/(Ce3+) molar ratio of 3 to 30 in an aqueous medium in an inert gas atmosphere to produce a suspension of cerium (III) hydroxide, and blowing oxygen or a gas containing oxygen into the suspension at a temperature of 10 to 95° C. and at an atmospheric pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.