Solution combustion synthesis of CeO2-CeAlO3 nano-composites by mixture-of-fuels approach

被引：44

作者：

Aruna, S. T. ^{[1
]}

Kini, N. S. ^{[2
]}

Rajam, K. S. ^{[1
]}

机构：

[1] Natl Aerosp Labs, Surface Engn Div, Bangalore 560017, Karnataka, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

来源：

MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 04期

关键词：

Oxides; Chemical synthesis; X-ray diffraction; Microstructure; RIETVELD REFINEMENT; CERIA; ALUMINA; POWDERS; GLYCINE; PHASE; UREA; CEALO3; LA;

D O I：

10.1016/j.materresbull.2008.09.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nano-composites of CeO2-CeAlO3 are synthesised by solution combustion method employing (a) urea and (b) a mixture of urea and glycine as fuels with corresponding metal nitrates. The as-prepared powders are all nano-sized (5-30 nm) and the same is confirmed by broadening of the X-ray diffraction peaks and transmission electron microscopy. A starting composition of Ce:Al in the atomic ratio 4:6 gives rise to different phases depending on the fuel being used for combustion. When urea alone is used as fuel, nano-crystalline CeO2 phase is formed with Al2O3 being in the amorphous state. When the mixture of a mixture of nano-sized CeO2 and CeAlO3 phases is obtained. However, upon sintering at fuels is used, the stable phases CeO2 and alpha-Al2O3 are formed in both the cases. Combustion synthesis 1400 degrees C in air, using mixture-of-fuels is proposed to be a route to stabilise low oxidation compounds such as CeAlO3, (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：728 / 733

页数：6

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