Green-emitting phosphor and cathode-ray tube employing it
US5600202A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 30, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | Aug 30, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7774
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A green-emitting phosphor of Tb-activated oxide, which is represented by the compositional formula: EQU (Y.sub.l-x-y-z Tb.sub.x Yb.sub.yD.sub.z).sub.3 (Al.sub.l-w Ga.sub.w).sub.5 O.sub.12 wherein D is at least one element selected from the group consisting of Sc and La, and x, y, z and w are numbers satisfying the following conditions: EQU 1.times.10.sup.-2 .ltoreq.x.ltoreq.2.times.10.sup.-1 EQU 1.times.10.sup.-6 .ltoreq.y.ltoreq.2.times.10.sup.-2 EQU 1.times.10.sup.-4 .ltoreq.z.ltoreq.5.times.10.sup.-1 EQU 0.ltoreq.w.ltoreq.1, and which contains from 1.times.10.sup.-5 to 1.times.10.sup.-2 gram atom of barium element per mol of the phosphor and is capable of emitting a color within the following range by CIE chromaticity coordinates: EQU 0.325.ltoreq.X.ltoreq.0.360 EQU 0.540.ltoreq.Y.ltoreq.0.625.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.