Dense alumina with a primary recrystallized polycrystalline structure and crystal orientation
US4323545A · kind A · utility
4Cited by
0References
3Claims
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Assignee
Inventors
Key dates
| Filing date | Feb 14, 1977 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Feb 14, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention is directed to a transparent alumina material and a method of preparing this material. The material is characterized as a dense primary recrystallized polycrystalline structure having a degree of preferred crystal orientation. The material is transparent to visible and infrared light and quantitative values are given. The transparent alumina covered by this invention is made by means of hot forging and an annealing process for powders or dense compacts of high-purity alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.