Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 6, Pages 8539-8545Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.01.068
Keywords
Eu:YAG transparent ceramics; Fluorescence property; Microstructure; Solid-state reactive sintering
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Funding
- Key Program of National Natural Science Foundation of China [91022035]
- Project for Young Scientists Fund of National Natural Science Foundation of China [51002172, 51302298]
- Science and Technology Innovation Program of Shanghai Institute of Ceramics, Chinese Academy of Sciences [Y32ZC2130G]
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Transparent Eu:Y3Al5O12 (Eu:YAG) fluorescent ceramics were fabricated by the solid-state reaction method using commercial Y2O3, alpha-Al2O3 and Eu2O3 as starting powders. The influence of Eu3+ concentration on the microstructure and optical properties of the obtained ceramics was investigated. Microstructure results indicated that all the ceramics with different Eu3+ concentrations possessed clean grain boundaries and homogeneous grains with the size range from 16.7 mu m to 19.9 pm. Both absorption and emission peak intensities strengthen with increasing Eu3+ concentration. The samples do not show concentration quenching for Eu3+ concentration above 0.7 at%, but the fluorescence properties are affected by the self-absorption of Eu3+ ions. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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