Determination of the temperature and enthalpy of the solid–solid phase transition of caesium nitrate by differential scanning calorimetry

2006 ◽  
Vol 445 (1) ◽  
pp. 36-39 ◽  
Author(s):  
E. Charrier ◽  
E.L. Charsley ◽  
P.G. Laye ◽  
H.M. Markham ◽  
B. Berger ◽  
...  
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Solid Phase ◽  
Scanning Calorimetry ◽  
Solid Phase Transition

Phase Diagram of the TbBr3-KBr Binary System

2004 ◽  
Vol 59 (1-2) ◽  
pp. 84-90 ◽  
Author(s):  
L. Rycerz ◽  
M. Gaune-Escard
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Differential Scanning Calorimetry ◽  
Phase Equilibrium ◽  
Binary System ◽  
Solid Phase ◽  
Scanning Calorimetry ◽  
Solid Phase Transition

The phase equilibrium of the TbBr3-KBr has been established by Differential Scanning Calorimetry. This system has the three compounds K3TbBr6, K2TbBr5, and KTb2Br7 and two eutectics located at (χTb = 0.163 (885 K) and (χTb = 0.433 (697 K). K3TbBr6 undergoes a solid-solid phase transition at 691 K and melts congruently at 983 K with the corresponding enthalpies 8.0 and 48.0 kJ mol−1. K2TbBr5 melts incongruently at 725 K, and KTb2Br7 at 741 K. The latter forms at 694 K, a temperature very close to that (697 K) of one of the two eutectics also existing in the binary system.

scholarly journals Determination of thermophysical properties of prototypes of tin-lithium alloy by differential scanning calorimetry

2022 ◽  
Vol 2155 (1) ◽  
pp. 012016
Author(s):  
V Bochkov ◽  
Yu Ponkratov ◽  
N Nikitenkov ◽  
Yu Baklanova ◽  
Yu Gordienko ◽  
...  
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Thermophysical Properties ◽  
Heat Of Fusion ◽  
Scanning Calorimetry ◽  
Fusion Enthalpy ◽  
Lithium Alloy ◽  
Pristine Sample ◽  
Experimental Complex

Abstract This paper presents a description of research works to determine the thermophysical properties of a tin-lithium alloy with a different percentage of lithium and tin atoms in the alloy. The method of differential scanning calorimetry (DSC) was used for the studies, by which the thermophysical properties of the alloy (temperature of phase transition and enthalpy) were determined. The work was carried out at the TiGrA experimental complex. Studies to determine the enthalpy and temperature of phase transition of prototypes of tin-lithium alloy were carried out in the temperature range from 150°C to 500°C at a heating rate of 10°C/min. The experiments were carried out with a pristine sample of tin (reference) and prototypes of a tin-lithium alloy, the percentage of lithium in which was 20, 25 and 27 at. %. As a result of the work performed, the melting point of the prototypes was determined, which was 224°C and 218°C. The values of the specific heat of fusion (enthalpy) of the investigated alloys were determined, which amounted to 76.5 J/g, 80.7 J/g and 86.3 J/g, respectively.

Thermodynamic Properties of EuCl2 and the NaCl-EuCl2 System

2001 ◽  
Vol 56 (9-10) ◽  
pp. 647-652 ◽  
Author(s):  
F. Da Silva ◽  
L. Rycerz ◽  
M. Gaune-Escard
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
Thermodynamic Properties ◽  
Linear Equation ◽  
Scanning Calorimetry ◽  
Temperature Range

Abstract The temperature and enthalpy of the phase transition and fusion of EuCl2 were determined and found to be 1014 K, 11.5 kJ mol-1and 1125 K, 18.7 kJ mol-1 , respectively. Addition­ ally, the heat capacity of solid EuCl2 was measured by Differential Scanning Calorimetry in the temperature range 306 -1085 K. The results were fitted to the linear equation C0p,m = (68.27 + 0.0255 T/K) J mol -1 K-1 in the temperature range 306 -900 K. Due to discrepancies in the liter­ ature on the temperature of fusion of EuCl2, the determination of the NaCl-EuCl2 phase diagram was repeated. It consists of a simple eutectic equilibrium at Teut = 847 K with x(EuCl2) = 0.49.

scholarly journals Phase Diagram and Electrical Conductivity of the PrBr3-CsBr Binary System

2010 ◽  
Vol 65 (10) ◽  
pp. 859-864 ◽  
Author(s):  
Leszek Rycerz ◽  
Ewa Ingier-Stocka ◽  
Madjid Berkani ◽  
Marcelle Gaune-Escard
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Electrical Conductivity ◽  
Binary System ◽  
Composition Range ◽  
Solid Phase ◽  
Molar Fraction ◽  
Liquid Mixtures ◽  
Scanning Calorimetry ◽  
Solid Phase Transition

Phase equilibrium in the PrBr3-CsBr binary system was established from Differential Scanning Calorimetry (DSC). This system has two compounds, Cs3PrBr6 and CsPr2Br7, and three eutectics located at molar fraction of PrBr3 (x = 0.108; 850 K), (x = 0.453; 767 K), and (x = 0.757, 870 K), respectively. Cs3PrBr6 undergoes a solid-solid phase transition at 726 K and melts congruently at 1051 K. CsPr2Br7 undergoes a solid-solid phase transition at 835 K, and melts congruently at 896 K. The electrical conductivity of PrBr3-CsBr liquid mixtures was measured down to temperatures below solidification over the whole composition range. Results obtained are discussed in term of possible complex formation.

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