Electrical properties of InAsxSb1−x alloys

1968 ◽  
Vol 46 (10) ◽  
pp. 1207-1214 ◽  
Author(s):  
William M. Coderre ◽  
John C. Woolley
Keyword(s):  
Electrical Conductivity ◽  
High Temperature ◽  
Electrical Properties ◽  
Optical Absorption ◽  
Thermoelectric Power ◽  
Hall Coefficient ◽  
Conductivity Data ◽  
Absorption Data ◽  
Alloy Scattering ◽  
Electrical Conductivity Data

Measurements have been made of the high-temperature Hall coefficient, electrical conductivity, and thermoelectric power in polycrystalline n-type samples of InAsxSb1−x alloys of extrinsic carrier concentration ~1017/cm3. From the Hall-coefficient data, values of the extrapolated absolute-zero band gap E00 have been determined over the whole alloy range, the thermoelectric power results being used to provide a correction factor to allow for effects of degeneracy. In all cases this correction was found to be very small. The resultant values of E00 for the alloys are somewhat lower than those obtained previously from optical absorption data and show a minimum of 0.17 eV at x ~0.4. From the electrical conductivity data, values of electron mobility μc have been obtained as a function of temperature T and composition x. At all temperatures in the range 0–500 °C, μc is found to vary linearly with x, indicating that the effects of alloy scattering are negligible. For each value of x, μc is found to satisfy the relation μc = μ0 exp (−T/θ), and the variation of θ with x has been determined.

Metal-like electrical conductivity in LaxSr2−xTiMoO6 oxides for high temperature thermoelectric power generation

2017 ◽  
Vol 46 (18) ◽  
pp. 5872-5879 ◽  
Author(s):  
Mandvi Saxena ◽  
Tanmoy Maiti
Keyword(s):  
Power Generation ◽  
Electrical Conductivity ◽  
High Temperature ◽  
Energy Conversion ◽  
Thermoelectric Power ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Power Generators ◽  
Thermoelectric Power Generation

Increasing electrical conductivity in oxides, which are inherently insulators, can be a potential route in developing oxide-based thermoelectric power generators with higher energy conversion efficiency.

High temperature electrical conductivity and thermoelectric power of NaxCoO2

2008 ◽  
Vol 179 (39) ◽  
pp. 2308-2312 ◽  
Author(s):  
P LIU ◽  
G CHEN ◽  
Y CUI ◽  
H ZHANG ◽  
F XIAO ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
High Temperature ◽  
Thermoelectric Power

Electrical properties of some molten ternary semiconductors

1977 ◽  
Vol 55 (11) ◽  
pp. 1975-1978 ◽  
Author(s):  
Yoshio Nakamura ◽  
Masamitsu Naoi ◽  
Mitsuo Shimoji
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Thermoelectric Power ◽  
Ternary Semiconductors ◽  
Effect Of Doping

The electrical conductivity and thermoelectric power of molten AgTlSe2, AgTlSe, and Tl2Se3 have been measured as a function of temperature. The effect of doping with Ag, Tl, and Se on the electrical properties of molten AgTlSe has also been studied. The results are discussed in terms of the pseudogap model.

The characterization of pure and niobium-doped crystals of strontium titanate using Hall, electrical conductivity, and optical absorption data

1978 ◽  
Vol 56 (4) ◽  
pp. 453-467 ◽  
Author(s):  
G. Perluzzo ◽  
J. Destry
Keyword(s):  
Heat Treatment ◽  
Electrical Conductivity ◽  
Optical Absorption ◽  
Hall Effect ◽  
Strontium Titanate ◽  
Defect States ◽  
Absorption Data ◽  
Niobium Doped ◽  
Hall Effect Measurements

A description is given of the heat treatment, under controlled conditions, of crystals of strontium titanate, both pure and niobium-doped, and of the effect of this treatment on the defect states in this material. Our analysis is based on evaluation of the results of electrical conductivity and Hall effect measurements, and those of optical absorption.

Scaling of Transport Properties of Reservoir Material at Low Saturations of a Wetting Phase

1994 ◽  
Vol 367 ◽  
Author(s):  
Y. Carolina Araujo ◽  
Pedro G. Toledo ◽  
Hada Y. Gonzalez
Keyword(s):  
Electrical Conductivity ◽  
Porous Media ◽  
Transport Properties ◽  
Capillary Pressure ◽  
Power Law ◽  
Scaling Laws ◽  
Pore Space ◽  
Conductivity Data ◽  
Phase Saturation ◽  
Electrical Conductivity Data

AbstractTransport properties of natural porous media have been observed to obey scaling laws in the wetting phase saturation. Previous work relates power-law behavior at low wetting phase saturations, i.e., at high capillary pressures, to the thin-film physics of the wetting phase and the fractal character of the pore space of porous media. Here, we present recent combined porousplate capillary pressure and electrical conductivity data of Berea sandstone at low saturations that lend support to the scaling laws. Power law is interpreted in terms of the exponent m in the relation of surface forces and film thickness and the fractal dimension D of the interface between pore space and solid matrix. Simple determination of D from capillary pressure and m from electrical conductivity data can be used to rapidly determine wetting phase relative permeability and capillary dispersion coefficient at low wetting phase saturations.

Wärmeleitfähigkeit, elektrische Leitfähigkeit, Hall-Effekt, Thermospannung und spezifische Wärme von Ag2Se

1962 ◽  
Vol 17 (10) ◽  
pp. 886-889 ◽  
Author(s):  
Y. Baer ◽  
G. Busch ◽  
C. Fröhlich ◽  
E. Steigmeier
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Low Temperature ◽  
Specific Heat ◽  
Thermoelectric Power ◽  
Hall Coefficient ◽  
A Value ◽  
Price Formula ◽  
Elektrische Leitfähigkeit ◽  
Increasing Temperature

The thermal conductivity, electrical conductivity. Hall coefficient und thermoelectric power of Ag2Se have been measured between 80 and 600°K. In the low temperature semiconductor phase the thermal conductivity increases with increasing temperature due to the high amount of carrier contribution. The latter has been calculated using the Price formula. Agreement with experiment is satisfactory. The specific heat has been measured between 30 and 200°C. For the latent heat a value of (5.7 ± 0.5) cal/gr was determined in agreement with measurements of Bellati and Lussana 4. In addition to the transition at 133 °C an unknown new transition has been found at about 90 °C.

Coulometric Titration Studies of Nonstoichiometric Nanocrystalline Ceria

1996 ◽  
Vol 457 ◽  
Author(s):  
O. Porat ◽  
H. L. Tuller ◽  
E. B. Lavik ◽  
Y.-M. Chiang
Keyword(s):  
Electrical Conductivity ◽  
Oxygen Vacancies ◽  
Coulometric Titration ◽  
Surface Adsorption ◽  
Oxygen Nonstoichiometry ◽  
Conductivity Data ◽  
Nanocrystalline Ceria ◽  
Electrical Conductivity Data

ABSTRACTOxygen nonstoichiometry measurements in nanocrystalline ceria, x in CeO2-x, were performed using coulometric titration. The measurements reveal large apparent deviations from stoichiometry, of the order of 10−3 − 10−4 at T = 405 − 455 °C and Po2 = 0.21 − 10−5 atm, as compared to levels of ∼10−9 for coarsened materials under the same conditions. The level of nonstoichiometry is, however, larger then expected from previous electrical conductivity data of nanocrystalline ceria. In addition, x ∝ Po2−½ while Σ ∝po2−1/6. The observed dependence of x(Po2, T) can be explained by either the formation of neutral oxygen vacancies at or near the interface, or by surface adsorption.

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