Ionic conductivity studies on neodymium doped ceria in different atmospheres

被引：1
|
作者：
Bedekar, Vinila V. [1 ]
Patra, Saheli [2 ]
Dutta, Atanu [2 ]
Basu, R. N. [2 ]
Tyagi, A. K. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India
[2] Cent Glass & Ceram Res Inst, Kolkata 700032, India
来源：
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY | 2010年 / 7卷 / 9-12期
关键词：
CeO2; powders-chemical preparation; sintering; ionic conductivity; grain boundaries; COMBUSTION SYNTHESIS;
D O I：
10.1504/IJNT.2010.034721
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nano-crystalline 10 and 20 mol% neodymium (Nd) doped ceria powders were prepared by gel-combustion synthesis. The single-phase nature of the nano powder has been confirmed by X-ray diffraction. These sinter-active nano powders resulted in dense products, as the sintered densities were found to be similar to 90% of theoretical densities. Ionic conductivity studies were carried out in air, hydrogen and oxygen atmospheres. The samples showed ionic conductivity of 1.3 x 10(-2) cm(-1) at 650 degrees C, and the activation energy values obtained in this system were in the range of 0.7-1.0 eV. These studies also revealed that no electronic conduction was observed, as the ionic conductivity values were almost similar in different environments.
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收藏
页码：1178 / 1187
页数：10
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