Process of making tantalate X-ray phosphors
US5310505A · kind A · utility
3Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Dec 16, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7769
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved flux for use in preparing X-ray phosphors comprises an alkali metal sulfate, an alkali metal metaborate and, optionally a strontium halide. By varying the concentration of the metaborate and strontium halide in the flux composition, the size and dry bulk density of the phosphor particles and the speed of the phosphor, respectively, can be controlled. Also disclosed is a process of making phosphors using the above flux, and X-ray intensifying screens containing such phosphors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.