발간논문

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Vol.33, No.4, 510 ~ 515, 1995
Title
Synthesis and Measurement of Electrical Conductivies of Ca2+ - ion Conductors Based on Calcium Hexaluminate
강길영 , 조영환 , 윤종규 G . Y . Kang , Y . W . Cho , J . K . Yoon
Abstract
Ca^(2+)-ion conductors based on calcium hexaluminate with MgO have been synthesized by direct solid-solid reaction and the phase compositions near Al₂O₃-rich region of the Al₂Z₃-CaO-MgO system at 1700℃ were examined by x-ray diffraction analysis. It has been found that MgO·Al₂O₃ spinel dissolves into the CaO·6Al₂O₃ magnetoplumbite structure to form a distorted magnetoplumbite structure. The electrical conductivity of this single phase was higher than the other multi-phases. The electrical conductivity of the phase having the composition of CaO:Al₂O₃:MgO = 1:6.6:0.4 in mole ratio was about 1×10^(-2) ohm^(-1)㎝^(-1) at 1400℃ which is high enough to use as a good solid electrolyte for high temperature sensor applications.
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