Differential scanning calorimetry has been used to study the influence of temperature on the heat capacity of synthesized vanadates Zn 2 V 2 O 7 , (Cu 0.56 Zn 1.44 )V 2 O 7 , and (Cu 1.0 Zn 1.0 )V 2 O 7 . It is found that dependences C p = f(T) have extremes. The thermodynamic properties of Zn 2 V 2 O 7 have been determined.
С помощью твердофазного синтеза из исходных компонентов CuO и V2O5 при ступенчатом обжиге получены CuV2O6 и Cu2V2O7. Методом дифференциальной сканирующей калориметрии измерена высокотемпературная теплоемкость оксидных соединений. По экспериментальным зависимостям CP=f(T) рассчитаны термодинамические свойства (изменение энтальпии, энтропии и приведенная энергия Гиббса). Установлено, что между удельной теплоемкостью и составом оксидов системы CuO-V2O5 имеется корреляция. DOI: 10.21883/FTT.2017.06.44500.407
The oxide compound Pb 8 La 2 (GeO 4 ) 4 (VO 4 ) 2 with an apatite structure has been synthesized by a ceramic method. The effect of temperature on the molar hear capacity of polycrystalline samples in the temperature range 320-1000 K has been studied by differential scanning calorimetry. The results have been used to calculate the thermodynamic functions of the synthesized compound.
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