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http://dx.doi.org/10.4191/KCERS.2007.44.4.219

Relationship between Ionic Conductivity and Composition of Li2O-ZrO2-SiO2 Glasses Determined from Mixture Design  

Kang, Eun-Tae (Division of Nano & Advanced Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University)
Kim, Myoung-Joong (R&D center, Gonggan Ceramic Co., Ltd.)
Kim, Jae-Dong (ATT Ltd.)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.4, 2007 , pp. 219-223 More about this Journal
Abstract
The ionic conductivity of $Li_2O-ZrO_2-SiO_2$ glasses has been designed and analyzed on the basis of a mixture design experiment with constraints. Fitted models for the activation energy and the ionic conductivity are as follows: $Q(kJ/moi)=54.8565x_1+144.825x_2+133.846x_3-170.908x_1x_3-334.338x_2x_3$ $log{\sigma}(300K)=-5.00245x_1-1.17876x_2-15.5173x_3+17.4522x_1x_3$. The electrical properties are very sensitive to the ratio of $Li_2O/SiO_2$. The effect of $ZrO_2$ is less than that of this ratio but $ZrO_2$ component attributes to the reduction of the activation energy. The optimal composition for best ionic conduction based on these fitted models is $55Li_2O{\cdot}10ZrO_2{\cdot}35SiO_2$. Its activation energy and ionic conductivity at 300 K are 46.98 kJ/mol and $1.08{\times}10^{-5}{\Omega}^{-1}{\cdot}cm^{-1}$, respectively.
Keywords
Experimental design; Mixture design; $Li_2O-ZrO_2-SiO_2$ glass; Ionic conductivity; Optimal composition;
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