Application of a novel type of adiabatic scanning calorimeter for high-resolution thermal data near the melting point of gallium

作者：Leys Jan^*; Losada Perez Patricia; Glorieux Christ; Thoen Jan

来源：Journal of Thermal Analysis and Calorimetry, 2014, 117(1): 173-187.

DOI：10.1007/s10973-014-3654-1

• Adiabatic scanning calorimetry
• Heat capacity
• Enthalpy
• Melting transition
• Gallium
• Peltier element

A novel type of adiabatic scanning calorimeter (ASC) based on Peltier elements (PEs) is used to obtain high-resolution enthalpy and heat capacity data on the melting transition of gallium. The accuracy of the specific heat capacity and specific enthalpy is about 2 %, for a sub-mK temperature resolution. The simultaneously determined equilibrium specific heat capacity and specific enthalpy are used to determine the heat of fusion and the purity. In addition, the use of the PE-based ASC as a classical heat step calorimeter and as a constant rate (DSC-type) calorimeter is discussed. A comparison of the ASC results with literature data and DSC data shows the advantages of ASC for the study of phase transitions.

• 出版日期2014-7