Luminescent substances having a base of double borate of magnesium and rare earths and low pressure mercury vapor lamp containing the same
US4422007A · kind A · utility
6Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Jun 17, 1981 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Jun 17, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/778
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New luminescent substances are disclosed. They have a monoclinic crystalline structure and are formed of a double borate of magnesium and rare earths having the general formula Ln.sub.1-x Tb.sub.x MgB.sub.5 O.sub.10 in which Ln represents at least one element selected from the group consisting of the lanthanides and yttrium and in which 0<x.ltoreq.1. The luminescent substances can be used in screens or tubes, for example, in low-pressure mercury vapor discharge lamps and plasma panels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.