Method for producing rare earth oxysulfide powder

US6296824A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Juergen Leppert · Forchheim, DE

Key dates

• Filing date: Mar 14, 2000
• Grant date: Oct 2, 2001
• Expiry date: Mar 14, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/7771
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a method for producing rare earth oxysulfide powder, reduction of rare earth oxysulfate to rare earth oxysulfide powder ensues under a protective gas with a reducing agent which is hydrogen or carbon monoxide, or a hydrocarbon gas such as methane or propane.