Crystallization and luminescence properties of (Sm^sub x^Y^sub 1 - x^)^sub 2^O3-Al^sub 2^O3-B^sub 2^O3 glass

• Published in: Glass and ceramics 2013-03, Vol.69 (11-12), p.370
• Main Authors: Mamadzhanova, E Kh, Golubev, N V, Sigaev, V N, Malashkevich, G E, Shimko, A N, Prusova, I V, Sergeev, I I
• Format: Article
• Language: English
• ISSN: 0361-7610; 1573-8515
• DOI: 10.1007/s10717-013-9481-1

Glass and products of solid-phase synthesis in the form of samarium-activated single-phase powders with huntite structure were obtained in the system Y^sub 2^O3-Al^sub 2^O3-B^sub 2^O3. It was shown that the glasses studied crystallize with predominately aluminum borate Al^sub 4^B^sub 2^O^sub 9^ precipitating in the bulk and the solid solution (Y, Sm)Al^sub 3^(BO3)^sub 4^ on the surface of the sample. When the crystalline powders (Sm^sub x^Y^sub 1 - x^)Al^sub 3^(BO3)^sub 4^ transitioned into an amorphous state leveling of the Stark structure and broadening of the luminescence bands of Sm^sup 3+^ was observed, but the luminescence branching ratios changed very little. It was found that lowering the synthesis temperature of such glasses from 1450 to 1250°C increases the BO^sub 4^ fraction and quantum yield of luminescence with low activator concentration.[PUBLICATION ABSTRACT]