Heat Capacity and Thermal Expansion of LaMgAl₁₁O₁₉

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发表日期：

2024年6月1日

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P. G. Gagarin,
A. V. Guskov,
V. N. Guskov,
G. E. Nikiforova,
K. S. Gavrcihev

摘要

Abstract

The heat capacity of LaMgAl₁₁O₁₉ with a magnetoplumbite structure was measured in the temperature range of 7–1865 K using relaxation, adiabatic, and differential scanning calorimetries. The obtained temperature dependences of the heat capacity are consistent based on adiabatic calorimetry data. Thermodynamic functions (entropy, enthalpy change, and reduced Gibbs energy) in the range 0–1865 K were calculated from fitted values. By using high-temperature X-ray diffraction, thermal expansion in the range of 300–1200 K was studied and the coefficient of thermal expansion of LaMgAl₁₁O₁₉ was calculated.

Heat Capacity and Thermal Expansion of LaMgAl11O19

摘要

Heat Capacity and Thermal Expansion of LaMgAl₁₁O₁₉