Synthesis and Physicochemical Properties of Nanopowders and Ceramics in a CeO2-Gd2O3 System

被引：15

作者：

Simonenko, T. L. ^{[1
]}

Kalinina, M., V ^{[1
]}

Simonenko, N. P. ^{[2
]}

Simonenko, E. P. ^{[2
]}

Khamova, T., V ^{[1
]}

Shilova, O. A. ^{[1
,3
]}

机构：

[1] Russian Acad Sci, Grebenshchikov Inst Silicate Chem, St Petersburg 199034, Russia

[2] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119071, Russia

[3] Ulanov Lenin St Petersburg State Electrotech Univ, St Petersburg 197376, Russia

来源：

GLASS PHYSICS AND CHEMISTRY | 2018年 / 44卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

cerium oxide; gadolinium oxide; coprecipitation; cryotechnology; nanopowder; ceramics; ionic conductivity; solid electrolyte; fuel cell; LIQUID-PHASE SYNTHESIS; OXIDE FUEL-CELLS; ELECTROLYTES; CONDUCTIVITY;

D O I：

10.1134/S1087659618040144

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanopowders with a composition of (CeO2)(1-x)(Gd2O3)(x) (x = 0.03, 0.05, 0.07, and 0.10) are synthesized by the coprecipitation method using cryotechnologies. The coherent scattering region (CSR) of the powders is 10-14 nm and the specific surface area is 70-81 m(2)/g. Based on the powders, ceramic nanosized materials with CRS of 64-71 nm are obtained. The dependence of the phase composition, microstructure, and electrical transport properties of the obtained samples on the Gd2O3 content is established. In a CeO2-Gd2O3 system, a solid solution with the composition of (CeO2)(0.90) (Gd2O3)(0.10) has the highest ionic conductivity with the transfer number of ions of t(i) = 0.74 at a temperature of 700 degrees C. It is shown that ceramics of this composition can be used as a solid electrolyte of intermediate-temperature fuel cells due to their physicochemical characteristics.

引用

页码：314 / 321

页数：8