Title:
PHOSPHOR POWDER, COMPOSITE, AND LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/203486
Kind Code:
A1
Abstract:
An embodiment of the present invention is a phosphor powder comprising α-type sialon phosphor particles containing Eu. In the phosphor powder, the ammonium ion concentration CA determined from the extracted ion analysis below is 15 ppm to 100 ppm. (Extracted ion analysis A) The phosphor powder (0.5 g) was added to 25 mL of distilled water in a polytetrafluoroethylene (PTFE) container having a lid and maintained at 60°C for 24 hours, after which the total mass MA of ammonium ions included in an aqueous solution obtained by removing the solid content by filtration was determined using ion chromatography. The value of CA is determined by dividing MA by the mass of the phosphor powder.
Inventors:
NOMIYAMA TOMOHIRO (JP)
TAKEDA YUSUKE (JP)
OKUZONO TATSUYA (JP)
MIYAZAKI MASARU (JP)
WATANABE SHINTARO (JP)
TAKEDA YUSUKE (JP)
OKUZONO TATSUYA (JP)
MIYAZAKI MASARU (JP)
WATANABE SHINTARO (JP)
Application Number:
PCT/JP2020/013105
Publication Date:
October 08, 2020
Filing Date:
March 24, 2020
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C09K11/64; H01L33/50; C09K11/08
Domestic Patent References:
| WO2014077240A1 | 2014-05-22 | |||
| WO2010018873A1 | 2010-02-18 | |||
| WO2012098932A1 | 2012-07-26 |
Foreign References:
| JP2006257353A | 2006-09-28 |
Attorney, Agent or Firm:
HAYAMI Shinji (JP)
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