Oxynitride phosphor activated by a rare earth element, and sialon type phosphor

US6776927B2 · kind B2 · utility

Assignee

• NATIONAL INSTITUTE FOR MATERIALS SCIENCE · JP

Inventors

• Mamoru Mitomo · Tsukuba, JP
• Tadashi Endo · Komaki, JP
• Kyouta Ueda · Sendai, JP
• Masakazu Komatsu · Rifu, JP

Key dates

• Filing date: Apr 8, 2003
• Grant date: Aug 17, 2004
• Expiry date: Apr 8, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/766
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An oxynitride phosphor activated by a rare earth element, represented by the formula CaxSi12&#8722;(m+n)Al(m+n)OnN16&#8722;n: EuyDyz, wherein stabilizing metal (Ca) is substituted partially by Eu or Eu and Dy where 0.3<x<1.5, 0.01<y<0.7, 0&lE;z<0.1, 0.6<m<3.0 and 0<n<1.5.