Mechanochemical synthesis of BaO-B2O3 glass and glass-ceramic phosphor powders containing europium ions

作者：Shinomiya Atsuko^*; Hayashi Akitoshi; Tadanaga Kiyoharu; Tatsumisago Masahiro

来源：Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B, 2012, 53(3): 128-131.

Glasses in the system Eu2O3-BaO-B2O3 were prepared by a mechanochemical process using B2O3, BaO, and Eu2O3 as starting materials. X-ray diffraction patterns indicate that amorphous 99.5(0.2BaO.0.8B2O3).0.5Eu(2)O(3) (mol%) powder was obtained using a planetary ball mill. From infrared and Raman spectra, the structural units observed in the milled glass with milling times longer than 5 h were the same as ones in the melt quenched glass. In photoluminescence measurements, the milled 99.5(0.2BaO.0.8B2O3).0.5Eu(2)O(3) glasses showed red emission due to Eu3+ ions. By heating the milled glass in air at temperatures higher than the crystallization temperature, 99.5(0.2BaO.0.8B2O3).0.5Eu(2)O(3) glass-ceramic was also prepared. The glass-ceramic showed broad emission in the range 380-450 nm from Eu2+ ions. Crystallization of the milled glass induced reduction of Eu3+ to Eu2+ in air.

• 出版日期2012-6