Effects of Eu Doping and Calcination Temperatures on Chemical Compositions, Microstructure and Luminescent Intensity of BaAl₂O₄

Abstract:

Photoluminescent (PL) materials are commonly utilized in applications such as leakage test, crack monitoring, banknote forgery detection, and fingerprint detection. Doping, chemical compositions and microstructure, are generally accepted as factors that influence luminescent intensity of spinel-structure phosphors such as SrAl₂O₄, CaAl₂O₄, and BaAl₂O₄. This study aimed at synthesizing BaAl₂O₄ photoluminescent powders by solution combustion technique. Effects of Eu doping and calcination temperatures on chemical compositions, microstructure and luminescent intensity of the materials were also examined. Experimental results indicated that Eu concentrations did not exhibit a significant effect on chemical composition and particle morphology. Higher calcination temperatures, on the contrary, resulted in reduction of secondary phase formation, and in alteration of morphology of particles and pores. The greatest luminescent intensity was achieved in the BaAl₂O₄ sample with 3 mol% Eu subjected to calcination at 900°C. Enhancement of the luminescent intensity in this sample might be attributed to minimal secondary phase and pore content.

• Periodical: Key Engineering Materials (Volume 766)
• Pages: 233-240
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.766.233
• Online since: April 2018
• Authors: Oratai Jongprateep*, Kritthin Chunwijitra
• Keywords: Barium Aluminate, Calcination, Doping, Photoluminescent

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