引用本文:
王贵领, 张密林, 赵辉, 霍丽华, 孙丽萍, 高山. Ca2+xLa8-x(SiO4)6O2-0.5x的合成及其导电机理[J]. 应用化学,
2006, 23(7): 782-785.
Citation: WANG Gui-Ling, ZHANG Mi-Lin, ZHAO Hui, HUO Li-Hua, SUN Li-Ping, GAO Shan. Synthesis and Conducting Mechanism of Ca2+xLa8-x(SiO4)6O2-0.5x[J]. Chinese Journal of Applied Chemistry, 2006, 23(7): 782-785.
Citation: WANG Gui-Ling, ZHANG Mi-Lin, ZHAO Hui, HUO Li-Hua, SUN Li-Ping, GAO Shan. Synthesis and Conducting Mechanism of Ca2+xLa8-x(SiO4)6O2-0.5x[J]. Chinese Journal of Applied Chemistry, 2006, 23(7): 782-785.
Ca2+xLa8-x(SiO4)6O2-0.5x的合成及其导电机理
English
Synthesis and Conducting Mechanism of Ca2+xLa8-x(SiO4)6O2-0.5x
Abstract:
The silicate oxyapatites Ca2+xLa8-x(SiO4)6O2-0.5x(x=0,0.5,1.0 and 2.0) were synthesized via a sol-gel method.The apatite phases were characterised by means of X-ray diffraction(XRD). Cell parameters a and c decreased with increasing composition parameter x.Conducting mechanism was studied via electrochemistry impedance spectroscopy(EIS),it indicated that oxygen ion migration in Ca2+xLa8-x(SiO4)6O2-0.5x was via a vacancy conduct mechanism.With increasing the amount of O2-,the conductivity is consi-derably enhanced,and activation energy is lowered;however,when the amount of O2- is 2,the conductivity is reduced,and activation energy is increased.The conductivity is almost independent of the oxygen partial pressure,this suggests that the silicate apatites are pure oxygen ionic conductors.
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