Phosphorescent phosphor and phosphorescent pigment
US9017575B2 · kind B2 · utility
2Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2011 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Dec 5, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7792
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An object of the present invention is to provide a phosphorescent phosphor having an excellent afterglow luminance after 10 to 12 hours after sunset under the outdoor excitation conditions. The phosphorescent phosphor is represented by the formula (Sr1-a-b-x-yMgaBabEuxDyy)Al2O4, wherein a satisfies a relation 0.02≦a≦0.1, b satisfies a relation 0.03≦b≦0.15, x satisfies a relation 0.001≦x≦0.04, y satisfies a relation 0.004≦y≦0.05, and (a+b) satisfies a relation 0.08≦(a+b)≦0.2. The phosphorescent phosphor has an excellent afterglow luminance after a long period of period of time in a manner most suitable for outdoor applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.