High-Temperature Thermal Properties of Germanium.

Sommelet, Pierre; Orr, Raymond L.

doi:10.1021/je60028a018

Cited by 28 publications

(10 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uncertainty of the thermal diffusivity using the laser flash method is estimated to be less than AE1:9 % for molten germanium and AE7:6 % for molten silicon. The uncertainty of the heat capacity using the drop method is estimated to be less than AE0:3 % for molten germanium 13) and AE1:0 % for molten silicon.…”

Section: )mentioning

confidence: 93%

“…Then, the thermal conductivity values of molten germanium and silicon were calculated from the present experimental thermal diffusivity data by coupling with the literature values of the heat capacity 13,14) and the density. The uncertainty of the thermal diffusivity using the laser flash method is estimated to be less than AE1:9 % for molten germanium and AE7:6 % for molten silicon.…”

Section: )mentioning

confidence: 99%

“…The heat capacities of molten germanium and silicon are known to stay constant with increasing temperature. 13,14) The densities of molten germanium and silicon slightly decrease with increasing of temperature. 15) However, positive temperature dependence is obtained in the thermal diffusivity values of molten germanium and silicon (See Figs.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Thermal Diffusivities and Conductivities of Molten Germanium and Silicon

2003

View full text Add to dashboard Cite

Thermal diffusivity values of molten germanium and silicon were measured by a laser flash method. Simple but useful sample cell systems were developed to keep the molten germanium and silicon shape uniform for a given thickness. In the present experimental condition, it is necessary to consider the effect of not only the radiative heat loss but also the conductive heat loss at the interface between the molten sample and the cell material under the present experimental conditions. However, the computer simulation results suggest that the conductive heat loss is found to be negligibly small. The thermal diffusivity values of molten germanium and silicon are given in the following equations (unit: m 2 /s).

show abstract

Section: )mentioning

confidence: 93%

Section: )mentioning

confidence: 99%

See 1 more Smart Citation

Thermal Diffusivities and Conductivities of Molten Germanium and Silicon

2003

View full text Add to dashboard Cite

show abstract

“…However, it has a counterpart with diamond structure and quite low melting temperature (1210 K), namely germanium, whose thermodynamic properties were intensively studied in the number of works more than 50 years ago. [16][17][18][19] Indeed, the excess specific heat (above "3R" law) was observed in all of them. This discrepancy was routinely ascribed to anharmonicity effects.…”

Section: Introductionmentioning

confidence: 93%

Intrinsic Planar Defects in Germanium and Their Contribution to the Excess Specific Heat at High Temperatures

Kondrin

Lebed

Бражкин

2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

Excessively high specific heat is usually observed in solids at comparatively high temperatures. It is believed to be associated with anharmonic effects. Using the simple case of elemental germanium with archetypical diamond structure, it is demonstrated that the anharmonicity effect can not fully describe the excess specific heat in germanium. Instead, two types of extended planar defects with a record low formation energy () are proposed, which can account for the discrepancy between theoretical and observed specific heat. These planar defects can be considered as finite distortion of crystal lattice produced by shear phonon modes accompanied by specific reconstruction of interatomic bonds on certain atomic planes. By comparison of experimental and theoretical specific heat, it is found that the germanium sample is subdivided into domains with intrinsic planar defects aligned along a single crystallographic direction.

show abstract

“…The selected values of the heat capacity of germanium and GaAs were taken from the following references: [14,21,22,23,24] and [25,26,27], respectively.…”

Section: Germanium and Gaasmentioning

confidence: 99%

The Description of Heat Capacity by the Debye – Mayer – Kelly Hybrid Model<strong> </strong>

Vasiliev¹,

Taldrik²

2020

Preprint

View full text Add to dashboard Cite

The universal Debye – Mayer – Kelly hybrid model was proposed for the description of the heat capacity from 0 K to the melting points of substance within the experimental uncertainty for the first time. To describe the heat capacity, the in-house software on the base of commercial one DELPHI-7 was used with a 95% confidence level. To demonstrate the perfect suitability of this model, a thermodynamic analysis of the heat capacities of the fourth group elements, and some compounds of the AIIIBV and AIIBVI phases was carried out. It produced good agreement within the experimental uncertainty. There is no a similar model description in literature.The Similarity Method is a convenient and effective tool for critical analysis of the heat capacities of isostructural phases, which was used as an example for diamond-like compounds. Phases with the same sum of the atomic numbers of elements (Z), such as diamond and B0.5 N0.5 (cub) (Z = 6); pure silicon (Si) and Al0.5 P0.5 (Z=14); pure germanium (Ge) and Ga0.5 As0.5 (Z = 32)); pure grey tin (alpha-Sn) and In0.5 Sb0.5, and Cd0.5 Te0.5 (Z = 50) have the same heat capacity experimental values in the solid state. The proposed models can be used to both different binary and multicomponent phases. It helps to standardize the physicochemical constants.

show abstract

High-Temperature Thermal Properties of Germanium.

Cited by 28 publications

References 1 publication

Thermal Diffusivities and Conductivities of Molten Germanium and Silicon

Thermal Diffusivities and Conductivities of Molten Germanium and Silicon

Intrinsic Planar Defects in Germanium and Their Contribution to the Excess Specific Heat at High Temperatures

The Description of Heat Capacity by the Debye – Mayer – Kelly Hybrid Model<strong> </strong>

Contact Info

Product

Resources

About