Preparation of ZnS:Cu,Cl electroluminescent phosphor
US6555021B2 · kind B2 · utility
1Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Dec 1, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/612
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for improving the half-life of ZnS:Cu,Cl electroluminescent phosphor wherein the improvement comprises firing a previously first fired material comprised of ZnS:Cu,Cl with a quantity of MgSO4.7H2O to form a second fired material. The quantity is from 0.015 to 0.15 mole of MgSO4.7H2O/mole of ZnS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.