As a candidate material for hydrogen separation, Yb-doped SrCeO₃ has attracted increasing attention in recent decades. In the present study, Yb-doped SrCe_0.9Yb_0.1O_3-α ceramics were prepared by the dry pressing and sintering approach, with the microstructure evolution and the micro morphology investigated. It was indicated that the ceramics sintered in air were of a pure perovskite structure, and that the sintering temperature had a significant effect on the growth of ceramic grains. The average grain size increased from 1 ​μm to 10 ​μm with an increase in sintering temperature from 1300 to 1500 ​°C. Further investigation of the thermodynamics and kinetics of grain growth revealed that the grain boundary diffusion was the main driving force of grain growth during solid phase sintering, with a grain growth index of 4 and an activation energy of approximately 61.23 ​kJ ​mol⁻¹. These results illustrate an obvious tendency of grain size growth. By electrochemical workstation with different atmospheres the effects of sintering temperature on the conductivity were characterized in the temperature range of 700–900 ​°C. The electrical conductivities σ of SrCe_0.9Yb_0.1O_3-α ceramics in different atmospheres were as follows: σ(wet hydrogen) ​> ​σ(dry hydrogen) ​> ​σ(dry air) ​> ​σ(wet air). In the test atmosphere containing water and hydrogen the conductivity of protons increased with increasing temperature because of the protons jump between lattices in the form of interstitial hydrogen ions or bare protons.

作为氢分离的候选材料，Yb 掺杂的 SrCeO ₃近几十年来引起了越来越多的关注。在本研究中，Yb 掺杂的 SrCe _0.9 Yb _0.1 O _3-α通过干压和烧结方法制备陶瓷，并研究了微观结构演变和微观形貌。表明在空气中烧结的陶瓷为纯钙钛矿结构，烧结温度对陶瓷晶粒的生长有显着影响。随着烧结温度从1300℃升高到1500℃，平均晶粒尺寸从1μm增加到10μm。对晶粒长大热力学和动力学的进一步研究表明，晶界扩散是固相烧结过程中晶粒长大的主要驱动力，晶粒长大指数为4，活化能约为61.23 kJ mol ^-1. 这些结果说明晶粒尺寸增长的明显趋势。通过不同气氛的电化学工作站，在700-900°C的温度范围内表征了烧结温度对电导率的影响。SrCe _0.9 Yb _0.1 O _3-α陶瓷在不同气氛下的电导率σ为：σ(湿氢) > σ(干氢) > σ(干空气) > σ(湿空气) . 在含有水和氢的测试气氛中，由于质子以间隙氢离子或裸质子的形式在晶格之间跳跃，质子的电导率随着温度的升高而增加。