烧结温度对Ce0.82Dy0.155Sr0.025O2-δ电解质组织和电性能的影响

IF 0.9 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI:10.2298/pac2202175r

S. Ramesh

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引用次数: 0

摘要

Ce0.82Dy0.155Sr0.025O2 - ?采用蔗糖-果胶改性溶胶-凝胶法制备了SDDC粉末。粉末在不同的温度下被压制和烧结，1200、1250和1300?C，制备相对密度分别为91%、93%和95%TD的致密陶瓷。采用Rietveld细化的XRD分析了其晶体结构和相组成。利用能量色散光谱对样品进行了成分分析和元素作图。用扫描电镜记录显微结构图像。电性能由阻抗分析仪测量。晶粒阻力和晶界阻力随晶粒尺寸的增大而变化。SDDC电解液在1300?C的总电导率提高到2.45?10?2秒/厘米在700?C，活化能为0.76 eV。将孔隙率修正应用于Bricklayer模型，计算比晶和晶界电导率。

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Effect of sintering temperature on microstructure and electrical properties of Ce0.82Dy0.155Sr0.025O2-δ electrolyte

Ce0.82Dy0.155Sr0.025O2-? (SDDC) powder was synthesized by a sucrose-pectin modified sol-gel process. The powder was pressed and sintered at different temperatures, 1200, 1250 and 1300?C, to prepare dense ceramics with a relative density of 91, 93 and 95%TD, respectively. Crystal structure and phase composition were analysed by XRD using Rietveld refinement. The sample compositional analysis and element mapping were carried out by energy-dispersive spectroscopy. Microstructure images were recorded by scanning electron microscope. The electrical properties were measured by an impedance analyser. The grain resistance and the grain boundary resistance changed with the increased grain size. The SDDC electrolyte sintered at 1300?C exhibits an enhanced total electrical conductivity of 2.45?10?2 S/cm at 700?C and the activation energy of 0.76 eV. The porosity corrections are applied to the Bricklayer model to calculate the specific grain and grain boundary conductivities.

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来源期刊

Processing and Application of Ceramics MATERIALS SCIENCE, CERAMICS-

CiteScore

1.90

自引率

9.10%

发文量

审稿时长

10 weeks

期刊介绍： Information not localized