Heat Capacity of Compounds in the Bi2O3–TiO2 System


The Bi12TiO20, Bi4Ti3O12, and Bi2Ti4O11 bismuth titanates have been prepared by solid-state reactions, via multistep firing of stoichiometric mixtures of their constituent oxides in air at temperatures from 1003 to 1273 K (Bi12TiO20, to 1123 K). The heat capacity of polycrystalline samples of the synthesized compounds has been determined by differential scanning calorimetry in the temperature range 330–1050 K. The Cp(T) curves of Bi4Ti3O12 and Bi2Ti4O11 show peaks at temperatures of 943 and 509 K, respectively, due to ferroelectric phase transitions. The experimental data have been used to evaluate the enthalpy increment, entropy change, and reduced Gibbs energy change of the bismuth titanates.

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Denisova, L.T., Kargin, Y.F., Chumilina, L.G. et al. Heat Capacity of Compounds in the Bi2O3–TiO2 System. Inorg Mater 56, 597–604 (2020). https://doi.org/10.1134/S0020168520060047

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  • bismuth titanates
  • differential scanning calorimetry
  • high-temperature heat capacity
  • phase transition