Phosphor and manufacturing method for the same, and light source
US7476337B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 15, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | May 25, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/77348
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
To provide a phosphor having an emission characteristic such that a peak wavelength of light emission is in a range from 580 to 680 nm, and having a high emission intensity, and having a flat excitation band with high efficiency for excitation light in a broad wavelength range from ultraviolet to visible light (wavelength range from 250 nm to 550 nm). For example, Ca3N2(2N), AlN(3N), Si3N4(3N), Eu2O3(3N) are prepared, and after weighing and mixing a predetermined amount of each raw material, raw materials are fired at 1500° C. for 6 hours, thus obtaining the phosphor including a product phase expressed by a composition formula CaAlSiN3:Eu and having an X-ray diffraction pattern satisfying a predetermined pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.