SCI和EI收录∣中国化工学会会刊

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

• • 上一篇    下一篇

Synthesis and Conductivity of Oxyapatite Ionic Conductor La10-xVx(SiO46O3+x

袁文辉1, 申荣平1, 李莉2   

  1. 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
  • 收稿日期:2009-08-07 修回日期:2010-01-08 出版日期:2010-04-28 发布日期:2010-04-28
  • 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)

Synthesis and Conductivity of Oxyapatite Ionic Conductor La10-xVx(SiO46O3+x

YUAN Wenhui1, SHEN Rongping1, LI Li2   

  1. 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)

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 La10-xVx(SiO4)6O3+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 La9.33Si6O26 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

Abstract: Apatite-lanthanum silicate has attracted considerable interest in recent years due to its high oxide ion conductivity.In this paper,V-doped samples La10-xVx(SiO4)6O3+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 La9.33Si6O26 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