Doping of calcium titanate with chromium and indium

The lattice parameters and composition range of orthorhombic CaTi_{1 – x} Cr_xO_{3 –} solid solutions were determined by x-ray powder diffraction. Samples with the nominal compositions CaTi_{1 – y} In_yO_{3 –} , synthesized in the range y=0.05–0.3, consisted of two phases: CaTiO_{3 –} and a CaIn₂O₄-based phase. The compositions of the synthesized phases were checked by x-ray microanalysis. The electrical conductivity of the CaTi_{1 – x} Cr_xO_{3 –} (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 data.__________Translated from Neorganicheskie Materialy, Vol. 41, No. 4, 2005, pp. 475–478.Original Russian Text Copyright © 2005 by Murashkina, Demina.