Influence of La2Mo2O9 on the sintering behavior and electrochemical properties of gadolinium-doped ceria

被引：6

作者：

Buvat, Gaetan ^{[1
,2
]}

Quarez, Eric ^{[1
]}

Joubert, Olivier ^{[1
]}

机构：

[1] Univ Nantes, UMR CNRS 6502, Inst Mat Jean Rouxel Nantes IMN, 2 Rue Houssiniere, F-44322 Nantes 03, France

[2] Univ Maine, UMR CNRS 6283, IMMM, Ave Olivier Messiaen, F-72085 Le Mans, France

来源：

CERAMICS INTERNATIONAL | 2017年 / 43卷 / 13期

关键词：

Gadolinium-doped ceria; CGO; La2Mo2O9; Sintering; Dilatometry; Electrochemical impedance spectroscopy; OXIDE FUEL-CELL; SINGLE CHAMBER CONDITIONS; SOLID-SOLUTIONS; OXYGEN PERMEABILITY; ION CONDUCTORS; CONDUCTIVITY; ELECTROLYTES; ANODE; CGO; CERAMICS;

D O I：

10.1016/j.ceramint.2017.05.036

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：

Gadolinium-doped ceria (known as CGO or GDC) is a good oxide-ion conductor which presents potential application for solid-state electrochemical devices. However, one of the main drawbacks of this material is the high sintering temperature required to obtain dense ceramic. In this paper, we report a new way to reduce densification temperature of CGO by adding x weight percent of La2Mo2O9 material (0 <= x <= 10). This latter is also a good oxide-ion conductor at high temperature (> 580 degrees C) which allows the preservation of the electrochemical properties of CGO as shown by impedance spectroscopy. The sintering behavior is then studied using dilatometric measurements and mechanism of densification is discussed.

引用

页码：10137 / 10143

页数：7

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[41] EXPANSION DURING SINTERING OF NACL POWDERS [J].