thermal conductivity of germanium

Germanium Optical Material.uk

Germanium (Ge) Germanium covers the whole of the 8-14 micron thermal band and is used in lens systems for thermal imaging. Germanium can be AR coated with Diamond producing an extremely tough front optic. Absorption Coefficient : <0.027 cm -1 @ 10.6 μm Molecular Weight : 72.59 To download this data or our MSDS safety data...

Properties of Germanium - electronic

Lattice Materials LLC 516 E. Tamarack St. Bozeman, MT 59718 406-586-2122 fax: 406-587-9055 Properties of Germanium - Electronic

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Germanium - Wikipedia

Germanium cluster anions (Zintl ions) such as Ge 4 2−, Ge 9 4−, Ge 9 2−, [(Ge 9) 2] 6− have been prepared by the extraction from alloys containing alkali metals and germanium in liquid ammonia in the presence of ethylenediamine or a cryptand.

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Thermal conductivity and its anisotropy research of ...

Its thermal conductivity is an invariable and isotropic parameter in germanium crystal in the same temperature and its thermal conductivity is difficult to be measured in thin film. In the present paper, using the non-equilibrium molecular dynamics simulation method and Stillinger–Weber potential model, the normal and tangential thermal conductivity of germanium thin film are studied.

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What is the thermal conductivity limit of silicon ...

Silicon–germanium (SiGe) alloys are promising candidate materials for thermoelectric (TE) energy conversion. The main reason is their low thermal conductivity (k), due to significant phonon scattering by alloying (or so-called alloy scattering), as the TE efficiency is inversely proportional to k. Good TE materials must have a low k

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Modeling the Thermal Conductivity and Phonon Transport in ...

Mar 19, 2008· Comparison of the thermal conductivity of a periodically aligned nanocomposite with 50nm cubic silicon particles distributed in a germanium matrix and that of a random composite with silicon nanoparticles having a size range from 10nmto100nm distributed randomly in a germanium matrix as a function of germanium atomic composition.

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Properties of Silicon

Silicon wafers properties. Silicon, Si - the most common semiconductor, single crystal Si can be processed into wafers up to 300 mm in diameter. Wafers are thin (thickness depends on wafer diameter, but is typically less than 1 mm), circular slice of single-crystal semiconductor material cut from the ingot of single crystal semiconductor.

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Thermal Conductivity of Elements – Angstrom Sciences ...

Find the Thermal Conductivity of Elements with Angstrom Sciences'' thermal conductivity reference.

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Lead Tellurides alloyed with Germanium and Silicium ...

Lead Tellurides alloyed with Germanium and Silicium - Thermal Conductivity. In the lead telluride materials PbTe-Ge and PbTe-Ge1-xSix the thermal conductivity is easily tuned by alloying Ge with Si and reducing the Ge content [2] . The below shown results are obtained in the temperature range between 25°C and 320°C.

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Thermal Conductivity of Metals, Metallic Elements and Alloys

Thermal Conductivity - k - is the quantity of heat transmitted due to an unit temperature gradient, in unit time under steady conditions in a direction normal to a surface of the unit area. Thermal Conductivity - k - is used in the Fourier''s equation. Calculate Conductive Heat .

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Reference Correlations for the Thermal Conductivity of ...

The proposed standard reference correlations for the thermal conductivity of liquid bismuth, cobalt, germanium, and silicon are respectively characterized by uncertainties of 10, 15, 16 and 15% at the 95% confidence level.

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Germanium (Ge (N-type)) Pieces Evaporation Materials - Lesker

Thermal Evaporation of Germanium (Ge (N-type)) In a deposition system with normal dimensions, a material with an equilibrium vapor pressure (EVP) of 1E-2 Torr will deposit at a rapid rate. Therefore, 1E-2 Torr is typically regarded as the EVP one should attempt to achieve during deposition. The only parameter that affects EVP is temperature.

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Thermal Conductivity and Thermoelectric Power of Germanium ...

Jun 15, 2004· Thermal conductivity measurements have been made on a series of germanium‐silicon alloys. At 300°K for an alloy containing 56 atomic percent Si, the thermal conductivity was found to be six times smaller than the value for pure Ge. Measurements of the thermoelectric power on some alloys are also reported.

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Properties of Silicon (Si), Germanium (Ge), and Gallium ...

Thermal Conductivity at 300 K (W/cm-degC) 1.5: 0.6: 0.46: Thermal Diffusivity (cm 2 /sec) 0.9: 0.36: 0.24: Vapor Pressure (Pa) 1 at 1650 deg C; 10-6 at 900 deg C: 1 at 1330 deg C; 10-6 at 760 deg C: .

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Thermal runaway in germanium laser windows (Journal ...

@article{osti_7080140, title = {Thermal runaway in germanium laser windows}, author = {Wilner, K. and Klinger, E. and Wild, W.J.}, abstractNote = {A 1-D model of thermal runaway in germanium induced by IR laser radiation is presented.

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Isotope effect in the thermal conductivity of germanium ...

The thermal conductivity of chemically, structurally, and isotopically highly pure germanium single crystals is investigated experimentally in the temperature range from 2 to 300 K. It is found that the thermal conductivity of germanium enriched to 99.99% 70 Ge is 8 times higher at the maximum than the thermal conductivity of germanium with the ...

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Table of Resistivity - HyperPhysics Concepts

*The resistivity of semiconductors depends strongly on the presence of impurities in the material, a fact which makes them useful in solid state electronics. References: 1. Giancoli, Douglas C., Physics, 4th Ed, Prentice Hall, (1995). 2. CRC Handbook of Chemistry and Physics, 64th ed. 3. Wikipedia, Electrical resistivity and conductivity.

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Thermal properties of Germanium (Ge)

Melting point T m =1210 K T m ≈1210 -2.0P (P in kbar) Saturated vapor pressure (in Pascals) for 760 °C - 10-6 for 1330°C -1

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Electrical Conductivity of Metals

Jan 22, 2019· Electrical conductivity in metals is a result of the movement of electrically charged particles. The atoms of metal elements are characterized by the presence of valence electrons, which are electrons in the outer shell of an atom that are free to move about. It is these ''free electrons'' that allow metals to conduct an electric current.

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(PDF) Thermal conductivities of silicon and germanium in ...

For liquid silicon, the thermal conductivity was about 57 W/mK at 1700 K and exhibited a slight increase with an increase in temperature. The thermal conductivity of liquid germanium was about 43 W/mK at 1273 K and slightly increased with increasing temperature.

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Thermal Conductivity of III-V Semiconductors | Electronics ...

Thermal Conductivity of III-V Semiconductors. The first four elements in the III column are Nitrogen (N), Phosphorus (P), Arsenic (As), and Antimony (Sb). The first four elements in the V column are Boron (B), Aluminum (Al), Gallium (Ga), and Indium (In). Note that Silicon (Si) is in column IV.

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(PDF) Thermal conductivity of meso-porous germanium | T ...

Thermal conductivity variations of a mesoporous germanium thin film with a porosity of 50% as a function of the phonon mean free path due We find a reduction of the bulk thermal conductivity of almost to porosity (Knp); black dots correspond to Monte Carlo simulations, blue two decades, or in absolute values a thermal conductivity near triangles are interpolated values for equivalent .

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What is silicon conductivity

The conductivity of such semiconductors can vary quite a lot, depending on the amount of impurities they have. Pure silicon (or germanium) has a fairly low conductivity, but its conductivity gets ...

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Germanium - Wikipedia

Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.Pure germanium is a semiconductor with an appearance similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature.

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Germanium(Ge) Windows for thermal imaging - Shalom

Germanium is commonly used in IR imaging systems typically operating in the 2 µm to 14 µm spectral range, covers the LWIR (8-12μm) and MWIR (3-5μm) thermal imaging wavelength range. Germanium can be AR coated with Diamond producing an extremely tough front optic. Germanium is more rugged than other IR materials,...

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Thermal conductivity in Si/Ge and Si/SiGe superlattices ...

Abstract: Silicon-germanium and silicon-germanium alloy-based superlattices show promise for application as efficient thermoelectrics because of their low thermal conductivity, below that of bulk Si 1-x Ge x alloys. In this paper, we demonstrate the sensitivity of the lattice thermal conductivity in Si/Ge and Si 1-x Ge x /Si 1-y Ge y superlattices to the interface properties, based on solving ...

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Thermal properties of Germanium (Ge)

Melting point T m =1210 K T m ≈1210 -2.0P (P in kbar) Saturated vapor pressure (in Pascals) for 760 °C - 10-6 for 1330°C -1

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Germanium - Specific Heat, Latent Heat of Fusion, Latent ...

Germanium - Specific Heat, Latent Heat of Fusion, Latent Heat of Vaporization . This article summarizes key chemical and thermal properties of this chemical element and atom.

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Thermal Conductivity of Germanium, Silicon, and Carbon ...

Thermal conductivity exhibits a decrease (∝ε−1/2, ε: mass variance) with an increase of doping concentration, that is characteristic of Klemens'' point defect model for the phonon scattering.

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Germanium - The periodic table of the elements by WebElements

Thermal conductivity: 60 W m ‑1 K ‑1; Coefficient of linear thermal expansion: 6 × 10 ‑6 K ‑1; Optical properties. The image above is a virtual representation of germanium metal calculated by Patrick Callet using the complex diectric function of the element only.

Thermal Conductivity and Thermoelectric Power of Germanium ...

Jun 15, 2004· Thermal conductivity measurements have been made on a series of germanium‐silicon alloys. At 300°K for an alloy containing 56 atomic percent Si, the thermal conductivity was found to be six times smaller than the value for pure Ge. Measurements of the thermoelectric power on some alloys are also reported.

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Germanium Evaporation Material (Ge) - Germanium ...

Germanium is a hard and brittle material with a semi-metallic, grayish-white appearance. It has a density of 5.35 g/cc, a melting point of 937 °C, and a vapor pressure of 10-4 Torr at 1,167 °C.It is classified on the periodic table as a metalloid, which means it .

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