Zinc sulfide phosphor coactivated with copper and aluminum
US4088921A · kind A · utility
1Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Jun 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A green emitting ZnS: Cu, Al cathodoluminescent phosphor having x and y coordinate values of from 0.250 to 0.280 and 0.560 to 0.615 respectively, is produced by a critical firing schedule exemplified by slow heating to about 1000.degree. C, soaking at this temperature for about 1 hour, followed by slow cooling at about 3.degree. C per minute to 700.degree. C, followed by air quenching. The phosphor is useful for example, in tri-color television color television cathode ray tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.