Lowering the sintering temperature of Gd-doped ceria by mechanochemical activation

被引：24

作者：

Jung, Won-Sik ^{[1
]}

Park, Hee-Seok ^{[1
]}

Kang, Young Jin ^{[2
,3
]}

Yoon, Dang-Hyok ^{[1
]}

机构：

[1] Yeungnam Univ, Sch Mat Sci & Engn, Gyongsan 712749, South Korea

[2] Pohang Univ Sci & Technol, Fuel Cell Res Ctr, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

来源：

CERAMICS INTERNATIONAL | 2010年 / 36卷 / 01期

关键词：

Milling; Powders: solid state reaction; CeO2; Fuel cells; ELECTRICAL-PROPERTIES; OXIDE; CERAMICS; ELECTROLYTE;

D O I：

10.1016/j.ceramint.2009.07.020

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：

Two kinds of Ce0.8Gd0.2O2-delta pellets were synthesized by a solid-state reaction using two types of commercial CeO2 and Gd2O3. In contrast to previous reports, pellets with a sintered density of 99% at 1300 degrees C were obtained regardless the powder used. Mechanochemical activation of the starting materials by 7 h of high energy milling, which resulted in particles several tens of nanometer in size, was effective in reducing the sintering temperature. Ce0.8Gd0.2O2-delta pellets could be synthesized by direct sintering without calcination due to the homogeneous distribution of fine starting materials. The final phase was confirmed by the ionic conductivity, X-ray diffraction patterns and lattice parameters. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：371 / 374

页数：4

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