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Citation: Wu Mingmei, Ren Yufang. IONIC CONDUCTIVITY AND OXYGEN SENSING PROPERTIES OF LaF₃ DOPED WITH PbF₂[J]. Chinese Journal of Applied Chemistry, ;1992, 9(1): 103-105. shu

IONIC CONDUCTIVITY AND OXYGEN SENSING PROPERTIES OF LaF₃ DOPED WITH PbF₂

Wu Mingmei ,
Ren Yufang ^,

1.
Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Corresponding author: Ren Yufang,
Received Date: 9 January 1991
Available Online: 17 April 1991

LaF₃ and La_1-xPb_xF_3-x (x=0.05~0.15) solid solution materials were prepared and their AC conductivities were measured at frequency of 10kHz Presence of an appropriate amount of PbF₂ made the conductivity increase, and the conductivity of La_0.95 Pb_0.05 F_2.95 was about one order of magnitude higher than that of pure LaF₃. Four solid galvanic cells made of La_0.95 Pb_0.05 F_2.95 as electrolyte were investigated as potentiometric oxygen sensor. The sensor cell of BiF₃(Bi)/La_0.95 Pb_0.05 F_2.95/Pt showed shorter response than the others. The 90% response of the cell took as short as 80s, while oxygen partial pressure changed from 0.21×10⁵Pa to 1.0×10⁵Pa at 150℃.The electrochemical reaction on the sensing electrode was referred to as "two electron reaction".
- lanthanum trifluoride,
- solid state electrolyte,
- oxygen sensor,
- conductivity
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IONIC CONDUCTIVITY AND OXYGEN SENSING PROPERTIES OF LaF3 DOPED WITH PbF2

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IONIC CONDUCTIVITY AND OXYGEN SENSING PROPERTIES OF LaF₃ DOPED WITH PbF₂