Firing technique for preparing a BaMgAl10O17 : Eu2+ phosphor with controlled particle shape and size

The effects of firing temperature on the crystallinity and the luminescent properties of BaMgAl10O17:Eu2+ phosphor have been investigated over the tem perature range 1000-1800 degrees C under preparative conditions which do no t use any flux such as AlF3. The effects of particle shape and size of the ingredient Al2O3 on the phosphor have also been studied under a preparative condition which has a firing temperature of 1700 degrees C and does not us e any flux. A single-phase BaMgAl10O17:Eu2+ with sufficient luminescent pro perties can be obtained over a firing temperature range of 1600-1800 degree s C through formation of the intermediate product BaAl2O4:Eu2+. Furthermore , the particle shape and size of the ingredient Al2O3 determine the particl e shape and size of BaMgAl10O17:Eu2+. High-temperature tiring in the absenc e of any flux has provided for the preparation of a single-phase BaMgAl10O1 7:Eu2+ with various particle shapes, such as spherical or platelike, and pa rticle sizes ranging from 2 to 18 mu m (C) 1999 The Electrochemical Society . S0013-4651(98)04-094-4. All rights reserved.