Microstructure and Electrical Properties of Ce1-xScxO2-x/2 Solid Electrolyte

被引：0

作者：

Xue Y. ^{[1
]}

Peng J. ^{[1
]}

Li S. ^{[1
]}

An S. ^{[1
,2
]}

机构：

[1] School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Inner Mongolia Key Laboratory of Advanced Ceramic Materials & Devices, Baotou

[2] Ordos Institute of Technology, Ordos

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2019年 / 37卷 / 04期

关键词：

Cerium oxide; Doping; Electrical conductivity; Scandium oxide;

D O I：

10.11785/S1000-4343.20190411

中图分类号：

学科分类号：

摘要：

The microstructure and electrical properties of Sc2O3 doped CeO2-based electrolyte materials were investigated. The Sc2O3 doped CeO2-based electrolyte powder was prepared by asol-gel method. The doping amounts of Sc2O3 were 6%, 8% and 10%, respectively. The electrolyte powder was pressed into a round shape by a one-way pressure method, and the electrolyte material was prepared by sintering at 1400, 1450 and 1500 ℃ in air. The effects of different doping ratios and different sintering temperatures on the phase composition, morphology and electrical conductivity of the electrolyte were investigated. The experimental results showed that Sc2O3 can be dissolved in CeO2 to form a solid solution at low temperature. With the increase of Sc2O3 doping amount from 6% to 10%, the unit cell parameters are reduced. Sc2O3 dissolved in CeO2 will precipitate during high temperature sintering. The precipitation increased with the increase of sintering temperature; when the doping amount of Sc2O3 of 8%, and the sintering temperature of 1500 ℃, the maximum conductivity of Sc2O3 doped CeO2 electrolyte at 750 ℃ is 8.78×10-3 S•cm-1, the activation energy can be 1.220 eV. © 2019, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.

引用

页码：473 / 480

页数：7

共 15 条

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