Open AccessВысокотемпературная теплоемкость TmBiGeO-=SUB=-5-=/SUB=- и YbBiGeO-=SUB=-5-=/SUB=-
Author(s) -
Л.Т. Денисова,
Н.В. Белоусова,
Н.А. Галиахметова,
В.М. Денисов,
Е.О. Голубева
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.02.45378.248
Subject(s) - differential scanning calorimetry , enthalpy , oxide , standard enthalpy change of formation , standard enthalpy of formation , solid state , calorimetry , materials science , thermodynamics , specific heat , analytical chemistry (journal) , chemistry , physics , organic chemistry , metallurgy
The TmBiGeO_5 and YbBiGeO_5 compounds have been synthesized from Tm_2O_3 (Yb_2O_3), Bi_2O_3, and GeO_2 oxides by the solid-state synthesis with successive burning at 1003, 1073, 1123, 1143, 1173, and 1223 K. High-temperature specific heat of the oxide compounds has been measured by differential scanning calorimetry. Basing on the experimental dependences C _p = f ( T ), the thermodynamic properties of the oxide compounds, i.e., the enthalpy and entropy variations, have been calculated.