Ba_2TiSi_2O_8ナノ結晶化ガラスの光学特性に及ぼす熱処理温度の影響

概要

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Nanocrystallized glasses with the composition of 40BaO・20TiO_2・40SiO_2, stoichiometric to fresnoite (Ba_2TiSi_2O_8), have been prepared by heat-treatment at various temperatures, and their optical properties, second-harmonic generation (SHG) and photoluminescence (PL), have been examined. The glass subjected to the heat-treatment at 760℃ for 1h showed a dense formation of Ba_2TiSi_2O_8 crystals with the dimension of 200-300nm, and maintained a visual transparency. Visible green light corresponding to SHG at 532nm was confirmed in the transparent Ba_2TiSi_2O_8 nanocrystallized glasses. The maximum second-harmonic intensity in the nanocrystallized samples was on the order of 1/100 when compared to that of an α-quartz single crystal. Furthermore, the bluish white PL with a peak at the wavelength of about 470nm was also visually observed in samples heat-treated at 750-800℃.
社団法人日本セラミックス協会の論文
2005-06-01