Abstract
The lattice parameters and composition range of orthorhombic CaTi1 − xCrxO3 − δ solid solutions were determined by x-ray powder diffraction. Samples with the nominal compositions CaTi1 − yInyO3 − δ, synthesized in the range y=0.05–0.3, consisted of two phases: CaTiO3 − δ and a CaIn2O4-based phase. The compositions of the synthesized phases were checked by x-ray microanalysis. The electrical conductivity of the CaTi1 − xCrxO3 − δ (0 < × ≤ 0.2)solid solutions was measured as a function of oxygen partial pressure (0.21 × 104 to 1.0 × 10−11 Pa) at 900 and 1000°C. Cr doping of calcium titanate was shown to increase its conductivity. A mechanism of defect formation in doped calcium titanate was inferred from conductivity versus \(p_{0_2 }\) data.
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