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A precursor of BaCe_(0.5)Zr_(0.4)Y_(0.1)O_(3-α) electrolytes was synthesized by the sol-gel method and sintered at temperature which were 150～250 ℃ lower than by solid state reaction. The AC impedance spectrums of electrolytes were measured by AUTOLAB PGSTA30 electrochemical measuring device at different temperatures. The conductivities of the electrolytes are 1.62×10~(-4)～6.43×10~(-3), 2.52×10~(-5)～3.73×10~(-3) S·cm~(-1) in the temperature range of 350～800 ℃. The activity energies are 0.54 and 0.84 eV. At the same time BaCe_(0.9)Y_(0.1)O_(3-α) was prepared by direct solid state reaction. The conductivity of BaCe_(0.9)Y_(0.1)O_(3-α) is 1×10~(-4)～4×10~(-3) S·cm~(-1) and the activation energy is 0.50 eV at the same condition. The results show that conduction of electrolyte prepared by sol-gel method is higher than the one by solid state reaction. As far as BaCe_(0.9)Y_(0.1)O_(3-α) concerned, its conductivity of the Zr-substituted specimens is decreased.
A precursor of BaCe_ (0.5) Zr_ (0.4) Y_ (0.1) O_ (3-α) electrolytes was synthesized by the sol-gel method and sintered at temperature which was 150 ~ 250 ℃ lower than by solid state reaction. The conductivities of the electrolytes are 1.62 × 10 -4 to 6.43 × 10 -3 and 2.52 × 10 -5 to 3.73 × The activity energies are 0.54 and 0.84 eV. At the same time BaCe_ (0.9) Y_ (0.1) O_ (3-α) The conductivity of BaCe_ (0.9) Y_ (0.1) O_ (3-α) is 1 × 10-4 ~ 4 × 10 -3 S · cm ~ (- 1) and the activation energy is 0.50 eV at the same condition. The results show that the conduction of the electrolyte prepared by sol-gel method is higher than the one by solid state reaction. As far as BaCe_ (0.9) Y_ (0.1) O_ 3-α) concerned, its conductivity of the Zr-substituted specimens is decreased.