Structure and Electrical Properties of Li2O-TiO2-P2O5/ Glasses

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doi:2003.40.2.178

J. Korean Ceram. Soc. > Volume 40(2); 2003 > Article

Journal of the Korean Ceramic Society 2003;40(2): 178.
doi: https://doi.org/10.4191/kcers.2003.40.2.178

Li₂O-TiO₂-P₂O₅계 유리의 구조와 전기적 성질

윤기현, 곽만석, 이용근¹

연세대학교 세라믹공학과
¹연세대학교 치과대학 치과생체재료공학교실 및 연구소

Structure and Electrical Properties of Li₂O-TiO₂-P₂O₅/ Glasses

ABSTRACT

Electrical conductivity of$50Li_2O-xTiO_2-(50-x)P_2O_5$ glasses has been studied with an increase of the intermediate$TiO_2$content. Thermal properties were observed from TG-DTA measurement and the variation of glass structure was investigated by FT-IR. The density and glass transition temperature increased with an increase of the $TiO_2$ content. These results were attributed to the fact that bond strengthening was occurred because of the formation of P-O-Ti cross linkages in the glass. The ionic conductivity increased with $TiO_2$ content and a maximum value, $1.2{ imes}10^{-6}$S/cm showed at x=20. The ionic conductivity showed a large increasement as a result that the pyrophosphate group become the predominant structural unit. This result can explain that Li ions mobility increased as a number of non-bridging oxygen on phosphate units increased.

Key words: Ionic conductivity, Phosphate gins, $TiO_2$, Non-bridging oxygen