혼합물설계법에 의한 Li₂O-TeO₂-ZnO 유리의 물성에 대한 조성의 가성성인자 분석
Additivity Factors Analysis of Compositions in Li₂O-TeO₂-ZnO Glass System Determined from Mixture Design
류봉기(부산대학교); 정영준(부산대학교); 이규호(부산대학교); 김태호(부산대학교); 김영석(부산대학교); 나영훈(부산대학교)
18권 11호, 617~622쪽
초록
In this study, the additivity factors of compositions to density and glass transition point (Tg) in a xLi₂O-(1-x)[(1-y)TeO₂-yZnO] (0<x<20, 0<y<20) glass system were analyzed by using mixture design, and the change of ionic conductivity with density and Tg was discussed. As a method for predicting the relation between glass structure and ionic conductivity, density was measured by the Archimedes method. The glass transition point was analyzed to predict the relation between ionic conductivity and the bonding energy between alkali ions and non-bridge oxygen (NBO). The relation equations showing the additivity factor of each composition to the two properties are as follows: Density(g/cm³) = 2.441x1＋5.559x2＋4.863x3 Tg(℃) = 319x1＋247x₂＋ 609x₃－1950x₁x₃ (x₁ : fraction of Li2O, x₂ : fraction of TeO₂, x₃ : fraction of ZnO) The density decreased as Li₂O content increased. This was attributed to change of the TeO₂structure. From this structural result, the electric conductivity of the glass samples was predicted following the ionic conduction mechanism. Finally, it is expected that electric conductivity will increase as the activation energy for ion movement decreases.
Abstract
In this study, the additivity factors of compositions to density and glass transition point (Tg) in a xLi₂O-(1-x)[(1-y)TeO₂-yZnO] (0<x<20, 0<y<20) glass system were analyzed by using mixture design, and the change of ionic conductivity with density and Tg was discussed. As a method for predicting the relation between glass structure and ionic conductivity, density was measured by the Archimedes method. The glass transition point was analyzed to predict the relation between ionic conductivity and the bonding energy between alkali ions and non-bridge oxygen (NBO). The relation equations showing the additivity factor of each composition to the two properties are as follows: Density(g/cm³) = 2.441x1＋5.559x2＋4.863x3 Tg(℃) = 319x1＋247x₂＋ 609x₃－1950x₁x₃ (x₁ : fraction of Li2O, x₂ : fraction of TeO₂, x₃ : fraction of ZnO) The density decreased as Li₂O content increased. This was attributed to change of the TeO₂structure. From this structural result, the electric conductivity of the glass samples was predicted following the ionic conduction mechanism. Finally, it is expected that electric conductivity will increase as the activation energy for ion movement decreases.
- 발행기관:
- 한국재료학회
- 분류:
- 재료공학