Fluorescent powder, process for producing the same, and light emitting device, display device, and fluorescent lamp containing fluorescent powder
US8197713B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Jan 18, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Aug 9, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
According to the present invention, a fluorescent powder composed mainly of an acicular or fibrous zinc oxide single crystal with an aspect ratio of 5 or higher is produced by the following steps: A zinc oxide single crystal powder can be produced at low cost without the need for a pulverization step or a similar step and high-density orientation can be realized by such crystal powder. Such crystal powder is most suitable for light emitting devices, display devices, fluorescent lamps, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.