Synthesis and Conductivity of Oxyapatite Ionic Conductor La10-xVx（SiO4）6O3+x

›› 2010, Vol. 18 ›› Issue (2): 328-332.

• PRODUCT ENGINEERING AND CHEMICAL TECHNOLOGY • Previous Articles Next Articles

Synthesis and Conductivity of Oxyapatite Ionic Conductor La_10-xV_x（SiO₄）₆O_3+x

YUAN Wenhui¹, SHEN Rongping¹, LI Li²

1. School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China;
2. College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China

Received:2009-08-07 Revised:2010-01-08 Online:2010-04-28 Published:2010-04-28
Supported by:
Supported by the Joint Funds of NSFC-Guangdong of China(U0834004);the Natural Science Foundation of Guangdong Province(06025657)

Synthesis and Conductivity of Oxyapatite Ionic Conductor La_10-xV_x（SiO₄）₆O_3+x

袁文辉¹, 申荣平¹, 李莉²

1. School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China;
2. College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China

通讯作者: YUAN Wenhui,E-mail:cewhyuan@scut.edu.cn
基金资助:
Supported by the Joint Funds of NSFC-Guangdong of China(U0834004);the Natural Science Foundation of Guangdong Province(06025657)

Abstract

Abstract: Apatite-lanthanum silicate has attracted considerable interest in recent years due to its high oxide ion conductivity.In this paper,V-doped samples La_10-xV_x(SiO₄)₆O_3+x(0≤x≤1.5) were prepared by sol-gel method and the influences of V-dopant content on calcining temperature and conductivity were reported.The samples were characterized by thermal analysis(TG-DSC), X-ray diffraction(XRD) and scanning electron micrograph(SEM) . The apatite was obtained at 800℃,a relatively low temperature in comparison to 1500℃ with the conventional solid-state method.The ceramic pellets sintered at 1200℃ for 5 h showed a higher relative density than La_9.33Si₆O₂₆ pellets sintered at 1400℃ for 20 h.The conductivities of samples were measured by electrochemical impedance spectroscopy.The conductivity was improved with the increase of V-dopant content on La site.

Key words: oxide ionic conductor, sol-gel method, interstitial oxygen ion conduction, oxyapatite

摘要： Apatite-lanthanum silicate has attracted considerable interest in recent years due to its high oxide ion conductivity.In this paper,V-doped samples La_10-xV_x(SiO₄)₆O_3+x(0≤x≤1.5) were prepared by sol-gel method and the influences of V-dopant content on calcining temperature and conductivity were reported.The samples were characterized by thermal analysis(TG-DSC), X-ray diffraction(XRD) and scanning electron micrograph(SEM) . The apatite was obtained at 800℃,a relatively low temperature in comparison to 1500℃ with the conventional solid-state method.The ceramic pellets sintered at 1200℃ for 5 h showed a higher relative density than La_9.33Si₆O₂₆ pellets sintered at 1400℃ for 20 h.The conductivities of samples were measured by electrochemical impedance spectroscopy.The conductivity was improved with the increase of V-dopant content on La site.

关键词: oxide ionic conductor, sol-gel method, interstitial oxygen ion conduction, oxyapatite

YUAN Wenhui, SHEN Rongping, LI Li. Synthesis and Conductivity of Oxyapatite Ionic Conductor La_10-xV_x（SiO₄）₆O_3+x[J]. , 2010, 18(2): 328-332.

袁文辉, 申荣平, 李莉. Synthesis and Conductivity of Oxyapatite Ionic Conductor La_10-xV_x（SiO₄）₆O_3+x[J]. , 2010, 18(2): 328-332.

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Synthesis and Conductivity of Oxyapatite Ionic Conductor La_10-xV_x（SiO₄）₆O_3+x

Synthesis and Conductivity of Oxyapatite Ionic Conductor La_10-xV_x（SiO₄）₆O_3+x

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