| Sr과 Mg 첨가량 및 소결조건에 따른 LSGM계 전해질의 특성 변화 |
| 이미재, 박상선, 최병현 |
| 요업기술원 신기능재료연구부 |
| Variations in the Properties of LSGM System Electrolyte with Sr and Mg Addition and Sintering Conditions |
| Mi-Jai Lee, Sang-Sun Park, Byung-Hyun Choi |
| Department of Advanced Functional Materials Research, Korea Institute of Ceramic Engineering and Technology |
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| ABSTRACT |
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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. |
| Key words:
(La$_{1-x}Sr_x)(Ga_{1-y}Mg_y)O_{3-\delta}$, Electrolyte, Perovskite, Sintering condition, SOFC |
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