Method for manufacturing a phosphor having high translucency

US5518659A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wolfgang Rossner · Holzkirchen, DE
• Hermann Boedinger · Munich, DE
• Juergen Leppert · Forchheim, DE
• Christa Grabmaier · Starnberg, DE

Key dates

• Filing date: Jan 26, 1995
• Grant date: May 21, 1996
• Expiry date: Jan 26, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/7771
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In an improved method for manufacturing a phosphor ceramic on the basis of a rare earth oxisulfide, a phosphor powder having a high specific surface of more than 10 m.sup.2 per gram is employed and is compressed to form a high-density, optically pure and translucent ceramic by single-axis hot-pressing under a reducing atmosphere.