Effects of Sc doping on electrical conductivity of BaZrO3 protonic conductors
来源期刊：Rare Metals2012年第1期
论文作者：GUO Ruisonga,WU Lijuna,b,REN Jianxuna,ZHANG Jianfanga,and JIANG Hongc a Key Laboratory of Advanced Ceramics and Machining Technology,Ministry of Education,Tianjin University,Tianjin ,China b No. Institute of China Ordnance Industry Group,Jinan ,China c Guizhou Broadcasting and Television College,Guiyang ,China
文章页码：71 - 74
摘 要：BaZr1-xScxO3-0.5x （x=0.07,0.10,0.13,0.16） powders were prepared by solid-state reaction method,and ZnO was used as sintering aid.Samples with different amount of ZnO additive were sintered at 1450·C for 6 h in air.Single cubic perovskite phase proton conductors were obtained.Conductivity was measured by electrochemical workstation.It was shown that Sc doping could increase conductivity through enhancing the carrier concentration in the material,but excessive Sc content might decrease the carrier concentration because of its charge compensation.ZnO had an influence on carrier concentration and mobility and affected the electrical conductivity.2 mol% ZnO and 13 mol% ScO1.5 doped sample showed the highest DC conductivity of 3.6×10-3 S·cm-1 tested at 800·C in wet hydrogen atmosphere.
GUO Ruisonga,WU Lijuna,b,REN Jianxuna,ZHANG Jianfanga,and JIANG Hongc a Key Laboratory of Advanced Ceramics and Machining Technology,Ministry of Education,Tianjin University,Tianjin 300072,China b No.53 Institute of China Ordnance Industry Group,Jinan 250031,China c Guizhou Broadcasting and Television College,Guiyang 550004,China
摘 要：BaZr1-xScxO3-0.5x （x=0.07,0.10,0.13,0.16） powders were prepared by solid-state reaction method,and ZnO was used as sintering aid.Samples with different amount of ZnO additive were sintered at 1450·C for 6 h in air.Single cubic perovskite phase proton conductors were obtained.Conductivity was measured by electrochemical workstation.It was shown that Sc doping could increase conductivity through enhancing the carrier concentration in the material,but excessive Sc content might decrease the carrier concentration because of its charge compensation.ZnO had an influence on carrier concentration and mobility and affected the electrical conductivity.2 mol% ZnO and 13 mol% ScO1.5 doped sample showed the highest DC conductivity of 3.6×10-3 S·cm-1 tested at 800·C in wet hydrogen atmosphere.
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