Abstract

ZrO2-CaO thin films have been prepared by thermal decomposition of 2-ethylhexanoate. Butanol solutions of Zr and Ca 2-ethylhexanoate containing 0 to 80mol% CaO were coated on Al2O3 ceramic substrates, dried at room temperature and 110°C, and then thermally decomposed at 550°C. The above operation was repeated eleven times, and then the specimens were finally heated at various temperatures from 550 to 1400°C. Results of X-ray diffraction and electric conductivity measurements showed that the thin films prepared from the coating solutions with compositions of 13 and 17mol% CaO by final heating at 1200°C had the highest X-ray diffraction intensity and electric conductivity, respectively. Activation energies for conduction were 0.78 to 1.36eV, and a maximum value of 1.36eV was obtained when CaO content in the coating solution was 20mol%.

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