Electrical conductivity in calcium titanate |
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Authors: | U Balachandran B Odekirk NG Eror |
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Institution: | Oregon Graduate Center, 19600 Northwest Walker Road, Beaverton, Oregon 97006 USA |
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Abstract: | The electrical conductivity of polycrystalline CaTiO3 was measured over the temperature range 800–1100°C while in thermodynamic equilibrium with oxygen partial pressures from 10?22 to 100 atm. The data were found to be proportional to the power of the oxygen partial pressure for the oxygen pressure range 10?16 – 10?22 atm, proportional to for the oxygen pressure range 10?8 – 10?15 atm, and proportional to for the oxygen pressure range greater than 10?4 atm. The region of linearity where the electrical conductivity varies as power of PO2 increased as the temperature was decreased. The observed data are consistent with the presence of small amounts of acceptor impurities in CaTiO3. The band-gap energy (extrapolated to zero temperature) was estimated to be 3.46 eV. |
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