Abstract
The effects of firing temperature on the crystallinity and the luminescent properties of phosphor have been investigated over the temperature 1000–1800°C range under preparative conditions which do not use any flux such as . The effects of particle shape and size of the ingredient on the phosphor have also been studied under a preparative condition which has a firing temperature of 1700°C and does not use any flux. A single‐phase with sufficient luminescent properties can be obtained over a firing temperature range of 1600–1800°C through formation of the intermediate product . Furthermore, the particle shape and size of the ingredient determine the particle shape and size of . High‐temperature firing in the absence of any flux has provided for the preparation of a single‐phase with various particle shapes, such as spherical or platelike, and particle sizes ranging from 2 to 18 μm. © 1999 The Electrochemical Society. All rights reserved.
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