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Citation: XIA Yan-Jie, ZHOU De-Feng, MENG Jian. Synthesis, Characterization and Electrical Properties of (Ce _0.9Nd_0.1)_1-xMo_xO_2-δ(0.00≤x≤0.10)[J]. Acta Physico-Chimica Sinica, ;2009, 25(07): 1415-1420. doi: 10.3866/PKU.WHXB20090716 shu

Synthesis, Characterization and Electrical Properties of (Ce _0.9Nd_0.1)_1-xMo_xO_2-δ(0.00≤x≤0.10)

1.
School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China

Received Date: 4 December 2008
Available Online: 28 April 2009

(Ce0.9Nd0.1)1-xMoxO2-δ(x=0.00, 0.02, 0.05, 0.10) were prepared by a modified sol-gel method. Sample structures were characterized by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM). The ionic conductivity was systematically studied over a temperature range from 350 to 800 ℃ in air using impedance spectroscopy. Results showed that the materials were single phase with a cubic fluorite structure. A higher relative density was obtained for (Ce0.9Nd0.1)0.98Mo0.02O2-δsintered at 1200 ℃ for 24 h compared to the relative density of Ce0.9Nd0.1O2-δ. Impedance spectroscopy showed a sharp increase in conductivity for the ceria system that contained a small amount of MoO3. The solution (Ce0.9Nd0.1)0.98Mo0.02O2-δ was shown to be the best conducting phase as it had the highest conductivity (total conductivity (σt) is 2.42 S·m-1, grain boundary conductivity (σGB) is 3.96 S·m-1 at 700 ℃) compared to a sample that was not doped with Mo (σt=0.05 S·m-1, σGB=0.19 S·m-1 at 700 ℃).
- Neodymium-doped ceria,
- Molybdenumoxide,
- Microstructure,
- Grain boundary conductivity
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Synthesis, Characterization and Electrical Properties of (Ce 0.9Nd0.1)1-xMoxO2-δ(0.00≤x≤0.10)

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通讯作者: 陈斌, bchen63@163.com

Synthesis, Characterization and Electrical Properties of (Ce _0.9Nd_0.1)_1-xMo_xO_2-δ(0.00≤x≤0.10)