Phase Separation and Precipitation Characteristics in ZnS doped Borosilicate Glasses

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J. Korean Ceram. Soc. > Volume 35(12); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(12): 1337.

ZnS 미립자 분산 붕규산엽계 유리에서의 분상 및 미립자 석출 특성

이승환, 류봉기¹

부산대학교 무기재료공학과
¹부산대학교 생산기술연구소

Phase Separation and Precipitation Characteristics in ZnS doped Borosilicate Glasses

ABSTRACT

To investigate an effect of phase separation on precipitation characteristics of ZnS microcrystals in ma-trix glass ZnS doped borosilicate glasses for nonlinear optical applications were prepared by melting and pre-cipitation process. ZnS dopant contributed to phase separation promotion which increased the phase separa-tion of the matrix glass within immiscibility region. It was also found that ZnS as phase separation promoter showed a similar contribution for some selected glass compositions in miscibility region. The precipitation of ZnS microcrystals occurred in thephase separable glass compoitions. The radius of ZnS microcrystals in-creased with increasing the heat treatment temperature and Na2O contents of matrix glass composition. The ZnS particle sizes estimated by effective mass approximation ranged from about 30 to 80${AA}$ It was suf-ficiently small to show quantum confinement effect.

Key words: ZnS, f Borosilicate glasses, Phase separation, recipitation, Nonlinear optics