Phosphor for electron beam excitation and color display device using the same
US7138756B2 · kind B2 · utility
57Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Sep 27, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Oct 11, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5436
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A phosphor, which has less reduction in emission efficiency and is capable of keeping high luminance even when density of an electron beam for exciting the phosphor increases, is provided. As raw materials, Ca3N2 (2N), AlN (3N), Si3N4 (3N), and Eu2O3 (3N) are prepared, and each of the raw materials is weighed so that a mole ratio of each element is, for example, (Ca+Eu):Al:Si=1:1:1, and mixed, then the mixture is held and fired at 1500° C. under the inert atmosphere for three hours, and thereafter ground to produce a phosphor having a composition formula of Ca0.985SiAlN3:Eu0.015
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.