The Hg-Cd-Zn-Te phase diagram

Yu, Teng-Chien; Brebrick, R. F.

doi:10.1007/bf02665761

Cited by 82 publications

(29 citation statements)

References 28 publications

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“…It should be noted that determinations for DH o f ;298 ðIÞ by metal Section I: Basic and Applied Research solution calorimetry [30][31][32] are À101000 AE 418; À101000 AE 836; and À 99997 AE 1255 ðJ/molÞ. The Gibbs energy of formation obtained here is in good agreement with the experimental values and with values used earlier by ourselves [5,6] and by Jianrong et al [4] However, that from Yamaguchi et al [30] is about 12 kJ/mol more negative since their measured value for DH o f ;298 ðIÞ is about 12 kJ/mol more negative than all the other published values. The fact that they do not fit the measured Gibbs energy of formation would seem to indicate an error in Fig.…”

Section: Discussionsupporting

confidence: 88%

“…The heat capacities given by Pavlova, by Yamaguchi, and in our study [6] of the Cd-Te system are all 50 AE 0:5 J/mol K at 298 K. However, they differ significantly at the 1365 K melting point where they are, respectively, 58.7, 62.0, and 70. We also note that the heat contents calculated with the heat capacity given by Yamaguchi et al are larger than those calculated with that given by Pavlova et al, but by <1 J/mol between 298 and 800 K and by only 1 kJ/mol at 1365 K.…”

Section: Third Law Analysissupporting

confidence: 45%

“…As mentioned earlier, this is because they used a heat capacity for CdTe that is about 16 J/mol K greater near 1365 K than that adopted here. Our earlier [6] analysis of the thermodynamic and phase diagram data for CdTe also used a heat capacity based upon the measurements of Mezaki et al, [8] which have been judged to be too large by Pavlova et al [3] …”

Section: Discussionmentioning

confidence: 99%

“…Earlier assessments of the entire Cd-Te system by Jianrong et al [4] in 1995 and by the author and coworkers. [5,6] depended in part on an estimate of the heat capacity of CdTe(c) made by Mills. [7] which was based on the heat content measurements by Mezaki et al [8] According to Pavlova et al, [3] this heat capacity is high by as much as 15 J/mol K at the 1365 K melting point.…”

Section: Introductionmentioning

confidence: 99%

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High Temperature Thermodynamic Data for CdTe(c)

Brebrick

2010

J. Phase Equilib. Diffus.

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The high temperature heat capacity, Gibbs energy of formation, and standard enthalpy and entropy of formation at 298 K are combined with thermodynamic data for Cd and revised data for Te to provide an internally consistent data set for CdTe(c). Equations are given for the Gibbs energy of formation from Cd(g) and Te 2 (g) and from the solid or liquid elements as a function of temperature. These give values similar to those used before. However, the derived enthalpy and entropy of formation are significantly different due to a revised heat capacity for CdTe(c). The standard enthalpy and entropy of formation at 298.15 K from the gases are 2293262 J/mol and 2200.593 J/mol K, respectively. From the solid elements they are 2100270 and 24.5334.

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Section: Discussionsupporting

confidence: 88%

Section: Third Law Analysissupporting

confidence: 45%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High Temperature Thermodynamic Data for CdTe(c)

Brebrick

2010

J. Phase Equilib. Diffus.

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“…It should be pointed out that the standard entropy of ZnTe, derived from our measurements, is somewhat lower than the 83.39 J K --1 mol --1 calculated by Yu and Brebrick [5] from the [2,3] data and a C p = AT 3 extrapolation below 15 K.…”

mentioning

confidence: 62%

Thermodynamic Properties of ZnTe in the Temperature Range 15-925 K

Гавричев

Sharpataya

Guskov

et al. 2002

phys. stat. sol. (b)

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Subject classification: 65.40.Ba; S8.13The heat capacity of ZnTe was measured in an adiabatic calorimeter in the temperature range from 15 to 330 K and by DSC at T = 290-925 K. The following standard thermodynamic properties of ZnTe were derived: C 0 p (298.15 K) = (49.52 AE 0.10) J K --1 mol --1 ; S 0 (298.15 K) = (81.94 AE 0.17) J K --1 mol --1 ;H 0 (298.15 K) --H 0 (0 K) = (10.98 AE 0.02) kJ mol --1 ; F 0 (298.15 K) = (45.12 AE 0.10) J K --1 mol --1 . Temperature dependences of the heat capacity and the Gibbs free energy function are derived for the temperature range up to 1500 K. The Debye temperature calculated from the specific heat data is Q D = 252 K.An ever-growing interest in cadmium-and zinc-telluride based semiconductors is associated with the application of these materials in X-ray, g-and IR-radiation detectors. Because of the high melting point, high vapor pressure and non-stoichiometry, crystal growth of these materials is a rather complicated procedure [1]. Fundamental thermodynamic properties, in particular heat capacity and Gibbs free energy, are the basis for computer modeling of crystallization, post-growth cooling and annealing parameters.The heat capacity of ZnTe has been measured earlier only at low temperatures: Demidenko and Maltsev [2] reported adiabatic calorimeter measurements from 55 to 300 K, and Irwin and LaCombe [3] used an adiabatic calorimeter with (Au + 0.03% Fe) vs. chromel thermocouples for specific heat measurements in the temperature range from 15 to 150 K; the latter results can be considered only as semi-quantitative.In this paper we report heat capacity measurements of ZnTe in a wide temperature range, 15 to 925 K, including the first experimental results at high temperatures.Crystalline ZnTe was prepared from high purity elements produced by NORANDA Co., Canada. The total impurity content was less than 1 ppm. The synthesis was carried out in a pumped and sealed quartz ampoule with vibrational homogenization. According to the XRD analysis, the sample was single phase with a cubic structure. Vapor pressure measurements at T > 800 K confirmed that the sample was within the homogeneity range of ZnTe.The heat capacity of ZnTe was measured in an adiabatic calorimeter at temperatures 15-327 K and by DSC at T = 290-950 K. Experimental results (84 points) are pre-1

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