Synthesis and properties of nanocrystalline ceria powders

被引：78

作者：

Basu, S ^{[1
]}

Devi, PS ^{[1
]}

Maiti, HS ^{[1
]}

机构：

[1] Cent Glass & Ceram Res Inst, Electroceram Div, Kolkata 700032, W Bengal, India

来源：

JOURNAL OF MATERIALS RESEARCH | 2004年 / 19卷 / 11期

关键词：

D O I：

10.1557/JMR.2004.0442

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline CeO2 powder was synthesized by a citrate-nitrate autoignition process and characterized by thermal analysis, x-ray diffraction, and impedance spectroscopy measurements. Nanocrystalline (20-40 nm) ceria powder with fluorite structure had formed in situ during the citrate-nitrate autoignition process. The powder prepared could be sintered to density more than 98% of theoretical density at 1450 degreesC. The nanocrystalline CeO2 exhibited an increase in conductivity in Ar and H-2 than air above 600 degreesC, suggesting a possible electronic contribution to the conductivity at low oxygen partial pressures. Impedance measurements on the sintered samples unequivocally established the potential of this process in developing phase pure ceria compositions.

引用

页码：3162 / 3171

页数：10

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