TY - JOUR
T1 - Synthesis and Conducting Properties of Al-doped La 10( SiO 4) 6O 3
AU - Wang, Gui Ling
AU - Zhao, Hui
AU - Gao, Shan
AU - Huo, Li Hua
AU - Sun, Ke Ning
PY - 2009/1
Y1 - 2009/1
N2 - The Al-dopcd La 10(SiO 4) 6O 3, namely La 10(SiO 4,) xO 3-05x. (x=0, 0.5, 1-0, 1.5 and 2), was synthesized via a sol-gel method at 850 °C . The apatite phases were characterized by TG-DTA, XRD, IR and SEM, and conducting properties were studied by electrochemical impedance spectroscopy (EIS). It is found that the conductivity depends on both the interstitial oxygen concentration and the volume of the unit cell. The conductivity of La 10(Si0 4) 55(AIO 4) 0.5O 2.75 1.88×l0 -2 S-cm -1 at 700 °C is the highest among all the synthesized oxyapatites due to the combined effect of the interstitial oxygen concentration and the volume of a unit cell. The dependence of electrical conductivity on oxygen partial pressure indicates that, the charge carriers of the silicate oxyapatile are oxygen ions.
AB - The Al-dopcd La 10(SiO 4) 6O 3, namely La 10(SiO 4,) xO 3-05x. (x=0, 0.5, 1-0, 1.5 and 2), was synthesized via a sol-gel method at 850 °C . The apatite phases were characterized by TG-DTA, XRD, IR and SEM, and conducting properties were studied by electrochemical impedance spectroscopy (EIS). It is found that the conductivity depends on both the interstitial oxygen concentration and the volume of the unit cell. The conductivity of La 10(Si0 4) 55(AIO 4) 0.5O 2.75 1.88×l0 -2 S-cm -1 at 700 °C is the highest among all the synthesized oxyapatites due to the combined effect of the interstitial oxygen concentration and the volume of a unit cell. The dependence of electrical conductivity on oxygen partial pressure indicates that, the charge carriers of the silicate oxyapatile are oxygen ions.
KW - Electrochemical impedance spectroscopy (EIS)
KW - Free oxygen ion conduction
KW - Interstitial oxygen ion conduction
KW - Si-doping apatites
KW - Sol-gel method
UR - http://www.scopus.com/inward/record.url?scp=64549154963&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:64549154963
SN - 1001-4861
VL - 25
SP - 26
EP - 30
JO - Chinese Journal of Inorganic Chemistry
JF - Chinese Journal of Inorganic Chemistry
IS - 1
ER -