Process for preparing crystalline ceric oxide
US5543126A · kind A · utility
50Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1995 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Jun 15, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is to provide a process for preparing ceric oxide particles used as an abrasive or polishing material for producing semiconductors or as a UV ray-absorbing material for plastics, glass and the like. The present invention relates to a process for preparing cerium (IV) oxide particles having a particle size of from 0.03 .mu.m to 5 .mu.m, which comprises adjusting an aqueous medium containing cerium (IV) hydroxide and a nitrate to a pH of from 8 to 11 with an alkaline substance and heating the aqueous medium at a temperature of from 100.degree. to 200.degree. C. under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.