摘要
ＩｎｔｒｏｄｕｃｔｉｏｎＦａｓｔｐｒｏｔｏｎｃｏｎｄｕｃｔｏｒｓｈａｖｅｂｅｅｎｓｔｕｄｉｅｄｆｏｒｓｅｖｅｒａｌｄｅｃａｄｅｓｄｕｅｔｏｔｈｅｉｒａｐｐｌｉｃａｔｉｏｎｓｔｏｌｏｗｔｅｍｐｅｒａｔｕｒｅｆｕｅｌｃｅｌｓａｎｄｈｕｍｉｄｉｔｙｓｅｎｓ...
A γ - type of layered zirconium hydrogen phosphate, Zr(HPO 4) 2·2H 2O( γ ZrP), was synthesized under hydrothermal conditions and characterized by powder X ray diffraction and thermogravimetric analysis. The temperature dependence of the proton conductivity in γ ZrP was investigated in a temperature range of 23￣413 ℃ by ac impedance spectroscopy. The variation of the conductivity with water loss and phase transitions was observed. The best proton conductivity in γ ZrP is 6×10 -4 S·cm -1 at 60 ℃. The proton conductivities in the dehydrated sample are ￣10 -5 at 150 ℃ and ￣10 -4 S·cm -1 at 350 ℃, respectively. The conductivities as a function of humidity in the temperature range of 120￣200 ℃ were measured.
