Effect of fuel type on microstructure and electrical property of combustion synthesized nanocrystalline scandia stabilized zirconia

被引：16

作者：

Lakshmi, V. Vijaya ^{[1
]}

Bauri, Ranjit ^{[1
]}

Paul, Soumalya ^{[1
]}

机构：

[1] Indian Inst Technol Madras, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 126卷 / 03期

关键词：

Chemical synthesis; Powder metallurgy; Electrical conductivity; Microstructure; CONDUCTIVITY; CERIA; ELECTROLYTE; GLYCINE; SOFC;

D O I：

10.1016/j.matchemphys.2010.12.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline 10 mol% scandia stabilized zirconia (10ScSZ) powders were prepared by combustion synthesis using three different types of fuels (urea, glycine and citric acid). The influence of nature of fuel on phase formation, particle size and morphological characteristics was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of fuel type on electrical conductivity was also evaluated. The 10ScSZ prepared by urea and glycine was fully crystalline whereas citric acid resulted in amorphous form. The powder turned crystalline on calcination at 800 degrees C. Urea resulted in highly agglomerated powder whereas porous and loose agglomerates were formed with glycine and citric acid as fuels. The powder processed with urea showed higher crystallite size compared to powders processed with glycine and citric acid. The ScSZ electrolyte pellet processed with glycine and citric acid exhibited better conductivity and lower activation energy compared to the electrolyte processed with urea. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：741 / 746

页数：6

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