Electrical properties optimization of calcium Co-doping system: CeO2–Sm2O3
Electrical properties optimization of calcium Co-doping system: CeO2–Sm2O3
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DOI：
10.1016/j.ijhydene.2012.05.095
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发表时间：
2012-08
影响因子：
7.2
通讯作者：
Yanjie Xia;Xiaojuan Liu;Yijia Bai;Hongping Li;Xiaolong Deng;Xiaodong Niu;Xiao-Jie Wu;Defeng Zhou;Zhongchang Wang;J. Meng
中科院分区：
文献类型：
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作者：
Yanjie Xia;Xiaojuan Liu;Yijia Bai;Hongping Li;Xiaolong Deng;Xiaodong Niu;Xiao-Jie Wu;Defeng Zhou;Zhongchang Wang;J. Meng
为了优化共掺杂氧化铈电解质的电性能，制备了不同温度（1150 °C，1200 °C，1250 ° C，1300 °C和1350 °C，8 h）下烧结的Ce0.8Ca0.15Sm0.05O2−δ（CCS），并对其进行了系统的研究。发现在这些在不同条件下烧结的样品中，在800 °C下测量的电导率（σ）可以排序为：CCS 1250 °C：[公式：见正文] = 2.38 × 10−2S cm−1> CCS 1200 °C：[公式：见正文] = 1.81 × 10−2S cm −1> CCS 1150 ° C：[公式：见正文]= 2.38 × 10−2S cm−1> CCS 1150 °C：[公式：见正文] = 1.81 × 10−2S cm−1> CCS 1150 °C：[公式：参见正文] = 1.50 × 10−2S cm−1> CCS 1300 °C：[公式：参见正文] = 1.26 × 10−2S cm−1> CCS 1350 °C：[公式：参见正文] = 0.68 × 10−2S cm−1。随着烧结温度的升高，CCS的电导率逐渐增大，其中1250 ° C烧结的样品具有最好的微观结构，电导率最高。但是，当烧结温度超过1250 °C时，CCS的电导率下降。我们把这归因于相位不稳定性。结果表明，复合掺杂氧化铈电解质的微观结构和相稳定性对电性能的优化有重要影响。
In order to optimize the electrical properties of co-doped ceria electrolytes, Ce0.8Ca0.15Sm0.05O2−δ(CCS) sintered at different temperatures (1150 °C, 1200 °C, 1250 °C, 1300 °C and 1350 °C for 8 h) have been prepared and systematically investigated. It is found that among these samples sintered at different conditions, the electrical conductivity (σ) measured at 800 °C can be ranked as: CCS1250 °C: [Formula: see text] = 2.38 × 10−2S cm−1> CCS1200 °C: [Formula: see text] = 1.81 × 10−2S cm−1> CCS1150 °C: [Formula: see text] = 1.50 × 10−2S cm−1> CCS1300 °C: [Formula: see text] = 1.26 × 10−2S cm−1> CCS1350 °C: [Formula: see text] = 0.68 × 10−2S cm−1. The electrical conductivity of CCS increases with the increase of sintering temperatures, and the 1250 °C-sintered sample presents the highest conductivity because of the best microstructures. However, the electrical conductivity of CCS decreases when the sintering temperatures goes beyond 1250 °C. We attribute this to the phase instability. It reveals that microstructures and the phase stability have important effects on the optimization of electrical properties for the co-doped ceria electrolytes.