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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Dae Ho (Department of Advanced Engineering, Kumoh National Institute of Technology) Park, Sung Bum (Department of Advanced Engineering, Kumoh National Institute of Technology) Park, Yong-il (Department of Advanced Engineering, Kumoh National Institute of Technology)
저널정보
한국재료학회 한국재료학회지 한국재료학회지 제28권 제5호
발행연도
2018.1
수록면
308 - 314 (7page)

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Among the fuel cell electrolyte candidates in the intermediate temperature range, glass materials show stable physical properties and are also expected to have higher ion conductivity than crystalline materials. In particular, phosphate glass has a high mobility of protons since such a structure maintains a hydrogen bond network that leads to high proton conductivity. Recently, defects like volatilization of phosphorus and destruction of the bonding structure have remarkably improved with introduction of cations, such as Zr4+ and Nb5+, into phosphate. In particular, niobium has proton conductivity on the surface because of higher surface acidity. It can also retain phosphorus content during heat treatment and improve chemical stability by bonding with phosphorus. In this study, we fabricate niobium phosphate glass thin films through sol-gel processing, and we report the chemical stability and electrical properties. The existence of the hydroxyl group in the phosphate is confirmed and found to be preserved at the intermediate temperature region of $150-450^{\circ}C$.

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