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1. (WO2003078543) NOVEL METHODS FOR PREPARING RARE-EARTH OXYSULFIDE PHOSPHORS, AND RESULTING MATERIALS

Pub. No.:    WO/2003/078543    International Application No.:    PCT/US2003/007751
Publication Date: Sep 25, 2003 International Filing Date: Mar 13, 2003
IPC: C09K 11/77
Applicants: UNIVERSITY OF FLORIDA
HOLLOWAY, Paul, H.
ABBOUDI, Mostafa
Inventors: HOLLOWAY, Paul, H.
ABBOUDI, Mostafa
Title: NOVEL METHODS FOR PREPARING RARE-EARTH OXYSULFIDE PHOSPHORS, AND RESULTING MATERIALS
Abstract:
The present invention provides new and useful methods for preparing rare-earth oxysulfide phosphors. Advantageously, in accordance with the methods of the subject invention, rare-earth oxysulfide phosphors can be prepared with lower reaction temperatures and fewer processing steps than methods currently in use. In a preferred embodiment, the process of the subject invention involves blending two different rare-earth nitrate salts and a sulfidizing agent. Then, the mixture is heated at relatively low temperatures until the rare-earth oxysulfide phosphor is produced.