Method for the preparation of single crystals of gadolinium gallium garnet
US4483734A · kind A · utility
2Cited by
3References
2Claims
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Key dates
| Filing date | Apr 18, 1983 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Apr 18, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/28
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In the crystal growing of GGG (gadolinium gallium garnet) by the Czochralski technique from a melt of the oxide mixture of gadolinium and gallium, zinc is added to the oxide melt as a dopant element in a limited amount so that the danger of crack formation in the grown single crystals can be greatly decreased contributing to the improvement of the productivity. Moreover, the GGG single crystal grown with zinc doping has remarkably reduced light absorption in the wavelength region of around 300 nm responsible to the yellowish tint of the crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.