Sol-gel synthesis and properties of Ce1-xGdxO2-x/2 solid solutions
Data(s) |
2001
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Resumo |
A series of solid electrolytes Ce1-xGdxO2-x/2(x=0 similar to0.6) was prepared by sol-gel method. The structure, thermal expansion coefficient and electrical properties of the solid solutions were systematically studied. XRD data showed that a complete cubic fluorite structure was formed at 160 degreesC. The purity of the product prepared by the sol-gel method is higher, the grain size is uniformly smaller. They were easily sintered into highly dense ceramic pellets at 1 300 degreesC. The sintering temperature was significantly lower than that by traditionally high temperature solid phase reaction method. The thermal expansion coefficient of Ce0.8Gd0.2O1.9, determined from high- temperature XRD data, is 8. 125 X 10(-6) K-1. Impedance spectra analyses showed that the grain-boundary resistance of the solid electrolyte prepared by sol-gel method was reduced or even eliminated. The conductivity of Ce0.8Gd0.2O1.9 is 5.26 X 10(-3) S/cm at 600 degreesC. The activation energy (E-a) is 0.82 eV. |
Identificador | |
Idioma(s) |
中文 |
Fonte |
Jiang K;Peng C;Li WJ;Wang L;Wang HY;Liang HW;Meng J.Sol-gel synthesis and properties of Ce1-xGdxO2-x/2 solid solutions,CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2001,22(8):1279-1282 |
Palavras-Chave | #FAST IONIC CONDUCTOR #HYDROTHERMAL SYNTHESIS #YTTRIA |
Tipo |
期刊论文 |