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http://dx.doi.org/10.4191/KCERS.2002.39.4.352

Variations in the Properties of LSGM System Electrolyte with Sr and Mg Addition and Sintering Conditions  

Lee, Mi-Jai (Department of Advanced Functional Materials Research, Korea Institute of Ceramic Engineering and Technology)
Park, Sang-Sun (Department of Advanced Functional Materials Research, Korea Institute of Ceramic Engineering and Technology)
Choi, Byung-Hyun (Department of Advanced Functional Materials Research, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.4, 2002 , pp. 352-358 More about this Journal
Abstract
The variations of the properties of Sr and Mg added $LaGaO_3$ system electrolyte with the amount of the additive and the sintering condition were studied. Main phase was (La$_{1-x}Sr_x)(Ga_{1-y}Mg_y)O_{3-\delta}$ phase for each compositions and the single phases $(La_{0.85}Sr_{0.15})(Ga_{0.85}Mg_{0.15})O_{3-\delta},(La_{0.85}Sr_{0.15})(Ga_{0.8}Mg_{0.2})O_{3-\delta}$ and $(La_{0.8}Sr_{0.2})(Ga_{0.8}Mg_{0.2})O{3-\delta}$ were obtained with the decrease in the sintering temperature and Mg addition. Thermal expansion coefficient of the $(La_{0.8}Sr_{0.2})(Ga_{0.8}Mg_{0.2})O_{3-\delta}$ decreased with the increase in the sintering temperature. Electric conductivity of electrolyte sintered at $1500^{circ}C$ for 1h was 0.14 S/cm at $800^{circ}C$ with 1 mA.
Keywords
(La$_{1-x}Sr_x)(Ga_{1-y}Mg_y)O_{3-\delta}$; Electrolyte; Perovskite; Sintering condition; SOFC;
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