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

Title
Lowering the sintering temperature of Gd-doped ceria by mechanochemical activation
Author(s)
정원식[정원식]박희석[박희석]강영진[강영진]윤당혁
Keywords
OXIDE FUEL-CELLS; ELECTRICAL-PROPERTIES; SOLID-SOLUTIONS; CERAMICS; ELECTROLYTES
Issue Date
201001
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v.36, no.1, pp.371 - 374
Abstract
Two kinds of Ce(0.8)Gd(0.2)O(2-delta) pellets were synthesized by a solid-state reaction using two types of commercial CeO(2) and Gd(2)O(3). 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. Ce(0.8)Gd(0.2)O(2-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.
URI
http://hdl.handle.net/YU.REPOSITORY/23014http://dx.doi.org/10.1016/j.ceramint.2009.07.020
ISSN
0272-8842
Appears in Collections:
공과대학 > 신소재공학부 > Articles
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