Process for the preparation of berlinite crystals with high Q factor
US4990217A · kind A · utility
16Cited by
8References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 26, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jan 26, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of berlinite crystals AlPO.sub.4, with a high Q factor, from seeds or crystalline flakes of AlPO.sub.4, by a hydrothermal method. It is characterized in that the crystallization solution is a sulfuric solution of AlPO.sub.4. The invention also relates to the berlinite monocrystals obtained by this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.