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Journal articles on the topic 'Temperature conductivity'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Voyevodin, V. N. "Low-temperature anomalies of the hardened tin conductivity." Functional materials 22, no. 4 (2015): 470–74. http://dx.doi.org/10.15407/fm22.04.470.

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Shi, Jinyan, Yuanchun Liu, Baoju Liu, and Dan Han. "Temperature Effect on the Thermal Conductivity of Expanded Polystyrene Foamed Concrete: Experimental Investigation and Model Correction." Advances in Materials Science and Engineering 2019 (June 17, 2019): 1–9. http://dx.doi.org/10.1155/2019/8292379.

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In this research, ultralightweight expanded polystyrene foamed concrete (EFC) was made by the chemical foaming method, and its thermal insulation property was measured by the transient method at different environment temperatures (from −10 to 40°C). Then, the effect of temperature and EPS volume fraction on the thermal conductivity and dry density of EFC were observed. Ultimately, the Cheng–Vachon equation was modified by introducing the temperature parameter. The results indicated that EFC thermal conductivity decreases with increasing temperature. It was also demonstrated that the suitable v

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PERES, N. M. R., and T. STAUBER. "TRANSPORT IN A CLEAN GRAPHENE SHEET AT FINITE TEMPERATURE AND FREQUENCY." International Journal of Modern Physics B 22, no. 16 (2008): 2529–36. http://dx.doi.org/10.1142/s0217979208039794.

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We calculate the conductivity of a clean graphene sheet at finite temperatures starting from the tight-binding model. We obtain a finite value for the dc-conductivity at zero temperature. For finite temperature, the spontaneous electron-hole creation, responsible for the finite conductivity at zero temperature, is washed out and the dc-conductivity yields zero. Our results are in agreement with calculations based on the field-theoretical model for graphene.

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Volcheck, V. S., M. S. Baranava, and V. R. Stempitsky. "Thermal conductivity of wurtzite gallium nitride." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 67, no. 3 (2022): 285–97. http://dx.doi.org/10.29235/1561-8358-2022-67-3-285-297.

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This paper reviews the theoretical and experimental works concerning one of the most important parameters of wurtzite gallium nitride – thermal conductivity. Since the heat in gallium nitride is transported almost exclusively by phonons, its thermal conductivity has a temperature behavior typical of most nonmetallic crystals: the thermal conductivity increases proportionally to the third power of temperature at lower temperatures, reaches its maximum at approximately 1/20 of the Debye temperature and decreases proportionally to temperature at higher temperatures. It is shown that the thermal c

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HU Ke, SUN Qianhui, HU Cuie, Wang Yan, ZENG Zhaoyi, and CHEN Jun. "First principles calculations of lattice dynamics and thermal transport properties of alpha uranium under high pressure." Acta Physica Sinica 74, no. 17 (2025): 0. https://doi.org/10.7498/aps.74.20250619.

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Through first-principles calculations based on Density Functional Theory (DFT) and the Boltzmann Transport Equation (BTE), we investigated the thermal transport properties of α-uranium under high pressure. In order to investigate the effect of pressure on the phonon dispersion relations and thermal conductivity of α-U, the phonon dispersion relations and lattice thermal conductivity at different pressures were calculated using a 4×4×4 supercell. For the calculation of electronic thermal conductivity, the ratio of conductivity to relaxation time is first calculated using the Boltzmann Transport

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6

Lucas, Killian, Sévan Bouchy, Pierre Bélanger, and Ricardo J. Zednik. "High-temperature electrical conductivity in piezoelectric lithium niobate." Journal of Applied Physics 131, no. 19 (2022): 194102. http://dx.doi.org/10.1063/5.0089099.

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Lithium niobate is a promising candidate for use in high-temperature piezoelectric devices due to its high Curie temperature ([Formula: see text]1483 K) and strong piezoelectric properties. However, the piezoelectric behavior has, in practice, been found to degrade at various temperatures as low as 573 K, with no satisfactory explanation available in the literature. We, therefore, studied the electrical conductivity of congruent lithium niobate single crystals in the temperature range of 293–1273 K with an 500 mV excitation at frequencies between 20 Hz and 20 MHz. An analytical model that gene

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Junaid, Massab, Taqi Ahmad Cheema, Hani Haleem, Saad-ul-Fatah, Khalid Rahman, and Cheol Woo Park. "Effects of thermal material properties on precision of transient temperatures in pulsed laser welding of Ti6Al4V alloy." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 9 (2018): 3170–81. http://dx.doi.org/10.1177/0954406218802604.

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This study investigates the effect of temperature-dependent material properties on the precision of a simulation in pulsed laser beam welding of Ti6Al4V alloy. Ti6Al4V is one of the most extensively used titanium alloys. The precision in transient temperature distributions developed in the thermal modeling part of a sequentially coupled thermo-mechanical simulation is crucial to the end results of structural mechanics. The temperature profile obtained by a finite element model at two distinct locations is validated by experimental results using temperature-dependent material properties. Then,

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Liu, Xiaoxia, Tingting Wang, Mingyu Zhuang, Binjie Xin, and Wei Liu. "Investigation of the Thermal Transfer Behavior of Single Layer Woven Fabrics at Different Temperatures." Journal of Engineered Fibers and Fabrics 11, no. 2 (2016): 155892501601100. http://dx.doi.org/10.1177/155892501601100202.

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The thermal conductivity of several high performance woven fabrics at temperatures ranging from −50? to 200? was measured using the hot wire method to explore the relationship between the thermal conductivity and temperature. Data regression of the least squares was used to obtain curves of the thermal conductivity of various fabrics vs. temperature. Results show that the thermal transfer process in woven fabrics is mainly thermal conduction consisting of phonon and molecular conduction. Thermal conductivity as a function of temperature varies as temperature range changes, and is significantly

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Yue, Peng, Lin Qiu, Xing Hua Zheng, and Da Wei Tang. "The Effective Thermal Conductivity of Porous Polymethacrylimide Foams." Key Engineering Materials 609-610 (April 2014): 196–200. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.196.

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A freestanding sensor-based 3ω method was employed to measure the effective thermal conductivity of porous polymethacrylimide (PMI) foams with different densities at different temperatures. Experimental data showed that within the measuring temperature range, the effective thermal conductivity increased with temperature. Moreover, the formation mechanism of the relationship between the effective thermal conductivity and temperature was analyzed in this paper.

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Sen, Pabitra N., and Peter A. Goode. "Influence of temperature on electrical conductivity on shaly sands." GEOPHYSICS 57, no. 1 (1992): 89–96. http://dx.doi.org/10.1190/1.1443191.

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In boreholes, temperatures vary and to extract hydrocarbon saturation from conductivity measurements, the influence of temperature on water and rock conductivities must be accounted for. The mobility [Formula: see text] of the counter‐ions due to clays and the electrical conductivity of pore‐filling brine show large changes with variation in temperature, whereas the microgeometry of the pore space exhibits negligible change. Using this idea, the temperature dependence of [Formula: see text] is extracted using data on dc electrical conductivity of shaly sands (σ) containing varying amounts of c

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Ni, Lei, Xiangrong Zhang, Lin Zhou, Xiufen Yang, and Bo Yan. "An Inverse Analysis for Establishing the Temperature-Dependent Thermal Conductivity of a Melt-Cast Explosive across the Whole Solidification Process." Materials 15, no. 6 (2022): 2077. http://dx.doi.org/10.3390/ma15062077.

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Thermal conductivity is one of the most important thermophysical properties of a melt-cast explosive. However, the temperature-dependent thermal conductivity of such explosives cannot be easily measured across the whole solidification process (including the liquid, semi-solid, and solid states). This study used an inverse analysis method to estimate the temperature-dependent thermal conductivity of a 2,4-dinitroanisole/cyclotetramethylenetetranitramine (DNAN/HMX) melt-cast explosive in a continuous way. The method that was used is described here in detail, and it is verified by comparing the e

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Prayitno, T. B., Y. P. Sarwono, E. Budi, M. A. Abdillah, and M. C. Kartika. "Temperature-dependence on thermal electric conductivity in FeCl₂ monolayer with biaxial strain." Journal of Physics: Conference Series 2672, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1742-6596/2672/1/012009.

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Abstract The dependence of thermal electric conductivity on temperature in a 1T-FeCl2 monolayer has been explored using the semi-classical Boltzmann transport theory. We provided the temperatures from near critical temperature up to room temperature. We observed different tendencies of thermal electric conductivity based on the existence of magnetism due to working temperature. As we applied the biaxial strain, we obtained the same contribution from both the magnetic and non-magnetic states to the thermal electric conductivity. We also found that the highest thermal electric conductivity may b

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13

Song, Hai Yan, Xin Xin Cheng, and Lei Chu. "Effect of Density and Ambient Temperature on Coefficient of Thermal Conductivity of Heat-Insulated EPS and PU Materials for Food Packaging." Applied Mechanics and Materials 469 (November 2013): 152–55. http://dx.doi.org/10.4028/www.scientific.net/amm.469.152.

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Coefficient of thermal conductivity is an important index of performance evaluation of heat-insulated material. In order to provide theoretical reference basis for the selection of heat-insulated materials, we test the coefficient of thermal conductivity of polystyrene foamed plastic (EPS) and rigid polyurethane foam plastic (PU) in different densities at different ambient temperatures, and then determine the effect of material density and ambient temperature on the coefficient of thermal conductivity of food insulation packaging materials. According to the national standard GB/T10297-1998(Tes

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14

Rahaman, M., Tapan Kumar Chaki, and D. Khastgir. "Temperature Dependent Electrical Properties of Conductive Composites (Behavior at Cryogenic Temperature and High Temperatures)." Advanced Materials Research 123-125 (August 2010): 447–50. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.447.

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Extrinsically conductive polymer composites can be developed by incorporation of conductive filler in suitable polymer matrix. The formation of conductive network in insulating matrix due to filler aggregation at and above percolation is responsible for electrical conductivity of such composites. The present investigation deals with effect of temperature on conductive composites made from different blends of Ethylene-Vinyl copolymer (EVA) and Acrylonitrile-Butadiene copolymer (NBR) filled with particulate carbon filler. The electrical properties of these composites depend on blend composition

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15

Kitaneh, Rushdi, Abdelkarim Saleh, and Robert Gould. "Ac electrical parameters of Al-ZnPc-Al organic semiconducting films." Open Physics 4, no. 1 (2006): 87–104. http://dx.doi.org/10.1007/s11534-005-0008-4.

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AbstractThe ac electrical parameters of thermally evaporated zinc phthalocyanine, ZnPc, semiconducting thin films was measured in the temperature range of 180–390 K and frequency between 0.1 and 20 kHz. Aluminum electrode contacts were utilized to sandwich the organic ZnPc semiconducting films. Capacitance and loss tangent decreased rapidly with frequency at high temperatures, but at lower temperatures a weak variation is observed. An equivalent circuit model assuming ohmic contacts could qualitatively and successfully explains capacitance and loss tangent behavior.The ac conductivity showed s

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Kuznetsova, O. G., A. M. Levin, A. O. Bol'shikh, O. M. Levchuk, and M. A. Kaplan. "Issledovanie udel'noy elektroprovodnosti reniysoderzhashchikh rastvorov karbonata ammoniya i raschet ee energii aktivatsii." Микология и фитопатология, no. 5 (December 15, 2023): 76–84. http://dx.doi.org/10.31857/s0869573323050099.

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The specific electrical conductivity dependence of aqueous solutions of ammonium carbonate and solutions of the ammonium carbonate—ammonium perrenate system on the reagents content in the range of their concentration of 0.1—1.8 mol/l for (NH4)2CO3, 0.01—0.1 mol/l for NH4ReO4 and solution temperatures in the range of 20-50 °C were investigated by the conductometric method. A linear increase in electrical conductivity with an increase in the temperature of electrolytes and a nonlinear increase with an increase in the concentration of reagents was revealed. The temperature coefficients values of

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17

D. M, Okpaga. "Investigating the Impacts of Temperature on the Electronic Conductivity of Si AND GaAs." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (2021): 2807–13. http://dx.doi.org/10.22214/ijraset.2021.37861.

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Abstract: This work explains the impacts of temperature on the electronic conductivity of silicon and gallium arsenide. Illustrations of how conductivity varies at different temperatures were depicted using equations and graphs. The effective use of semiconductor materials depends on the proper fabrication of the material about its temperature dependence. Also, the analysis of the variation of electronic conductivity in both silicon and that of gallium arsenide with a small band gap is performed towards analyzing the impacts of this on silicon and gallium arsenide. Keywords: Temperature, Silic

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18

NUÑEZ REGUEIRO, MANUEL D., and DARÍO CASTELLO. "THERMAL CONDUCTIVITY OF HIGH TEMPERATURE SUPERCONDUCTORS." International Journal of Modern Physics B 05, no. 12 (1991): 2003–35. http://dx.doi.org/10.1142/s021797929100078x.

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We review and analyze the data on the thermal conductivity of both ceramic and single crystal samples of high temperature superconductors. A universal pattern can be extracted and interpreted in the following way: phonons are the main heat carriers in these materials, and in the high temperature range the thermal conductivity κ is almost constant due to phonon scattering against disorder; below the superconducting transition temperature κ increases as phonon scattering against carriers condensing into the superconducting state decreases and at still lower temperatures there is a region in whic

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Sudorgin, S. A., and N. G. Lebedev. "Temperature dependence of carbon nanoparticles transport characteristics." Вестник Пермского университета. Физика, no. 3 (2020): 24–30. http://dx.doi.org/10.17072/1994-3598-2020-3-24-30.

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Technique for calculating the temperature dependences of transport characteristics of different carbon nanoparticles: single-walled nanotubes, graphene, bilayer graphene in a constant external electric field is proposed. Formulas for conductivity and the diffusion coefficient of electrons in carbon nanostructures obtained analytically and analyzed numerically. Conductivity in single-walled and bilayer carbon nanostructures decreases with increasing temperature. The electrical conductivity of carbon nanoparticles depends nonlinearly on the amplitude of the external constant electric field for v

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20

Deschamps, Frédéric. "Stagnant lid convection with temperature-dependent thermal conductivity and the thermal evolution of icy worlds." Geophysical Journal International 224, no. 3 (2020): 1870–89. http://dx.doi.org/10.1093/gji/ggaa540.

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SUMMARY Convection is an efficient process to release heat from planetary interiors, but its efficiency depends on the detailed properties of planetary mantles and materials. A property whose impact has not yet been studied extensively is the temperature dependence of thermal conductivity. Because thermal conductivity controls heat fluxes, its variations with temperature may alter heat transfer. Here, I assess qualitatively and quantitatively the influence of temperature-dependent thermal conductivity on stagnant lid convection. Assuming that thermal conductivity varies as the inverse of tempe

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Bondarenko, A. V., O. A. Gavrenko, B. A. Merisov, M. A. Obolenskii, A. V. Sologubenko, and G. Ya Khadzhai. "Thermal conductivity of a YBa2Cu3O7−x single crystal in the temperature interval 2–300 K." Soviet Journal of Low Temperature Physics 17, no. 3 (1991): 165–67. https://doi.org/10.1063/10.0032801.

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The thermal conductivity λ(T) in the basal plane of a YBa2Cu3O7−x single crystal is studied in the temperature interval 2−300 K. In the temperature range 2−12 K, λ(T) is found to be proportional to T. Such a temperature dependence is associated with heat transport by flexural vibrations. The thermal conductivity peak lies in the region of 50 K. The superconducting transition (Tc = 90 K) results mainly in the emergence (or vanishing) of the electron contribution to heat transport. At higher temperatures, nonmonotonicities are observed in the temperature dependence of thermal conductivity. In al

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Sarmasov, S., R. Rahimov, and A. Akhmedova. "EFFECT OF OXYGEN AND SPONTANEOUS POLARIZATION OF LiNbO3 ON THE CONDUCTIVITY OF THIN PbTe FILMS." Sciences of Europe, no. 100 (September 5, 2022): 59–62. https://doi.org/10.5281/zenodo.7049720.

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The conductivity of thin layers of lead telluride on (0001) faces of lithium niobate during growth has been studied. It is shown that the value and type of conductivity depend on the rate of PbTe condensation, which is related to the dissolution of oxygen molecules in the layer

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23

Maltsev, Alexey P., Ilya V. Chepkasov, Alexander G. Kvashnin, and Artem R. Oganov. "Ionic Conductivity of Lithium Phosphides." Crystals 13, no. 5 (2023): 756. http://dx.doi.org/10.3390/cryst13050756.

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We comprehensively study the ionic conductivity in lithium phosphides, promising materials for energy storage applications, by using a combination of first-principles computations and machine learning interatomic potentials. Using the quasiharminic approximation, we calculated convex hulls of the Li-P system at various temperatures and the temperature-composition phase diagram was obtained, delineating the stability regions of each phase. The ionic conductivity of stable (Li3P, LiP, Li3P7, Li3P11, LiP7) and metastable (Li4P3, Li5P4, LiP5) compounds was studied as a function of temperature. In

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Sahu, A. K., S. K. Satpathy, and Banarji Behera. "Dielectric and frequency-dependent transport properties of lanthanum-doped bismuth ferrite." Journal of Advanced Dielectrics 09, no. 04 (2019): 1950031. http://dx.doi.org/10.1142/s2010135x19500310.

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Polycrystalline samples of Bi[Formula: see text]LaxFeO3 [[Formula: see text], 0.6, 0.7 and 0.8] were synthesized through high temperature solid state reaction method. The structural studies of the compounds were done using X-ray diffraction technique. Dielectric constant and dielectric loss were studied for various frequencies (100[Formula: see text]Hz–104[Formula: see text]Hz) at different temperatures. The temperature-dependent non-Debye type relaxation process was suggested in the materials from the analysis of frequency-dependent electrical data at different temperatures. Temperature depen

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Huang, Zhongbing, and Shiping Feng. "Optical Conductivity in the Copper Oxide Materials." Modern Physics Letters B 12, no. 18 (1998): 735–42. http://dx.doi.org/10.1142/s021798499800086x.

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The frequency- and temperature-dependent optical conductivity of the copper oxide materials in the underdoped and optimal doped regimes are studied within the t–J model. The conductivity spectrum shows the unsual behavior at low energies and anomalous midinfrared peak in the low temperatures. However, this midinfrared peak is severely depressed with increasing temperatures, and vanishes at higher temperature.

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Arora, Susheel, Virender Kundu, D. R. Goyal, and A. S. Maan. "DSC and DC Conductivity of Bi2O3 · LiF · B2O3 Glasses." ISRN Ceramics 2013 (January 29, 2013): 1–5. http://dx.doi.org/10.1155/2013/914324.

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Fluoroborate glasses with Bi2O3 content and having compositions xBi2O3 · (40-x)LiF · 60B2O3 (x = 0, 5, 10, 15, and 20) are prepared using melt-quench technique. DSC characterization is carried out to observe glass transition temperature. Two such temperatures are observed for each of the reported samples. DC conductivity of the reported samples is studied with the variation in temperature from 313 K to 413 K by dividing this range into three regions, namely, low-, intermediate-, and high-temperature regions. DC conductivity responses for these temperature regions are explained using different

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MARQUES, ARTHUR RODRIGUES, and ALEK SANDRO DUTRA. "METODOLOGIA DO TESTE DE CONDUTIVIDADE ELÉTRICA EM SEMENTES DE SORGO GRANIFERO." Revista Brasileira de Milho e Sorgo 17, no. 1 (2018): 147. http://dx.doi.org/10.18512/1980-6477/rbms.v17n1p147-156.

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RESUMO - A condutividade elétrica da solução de embebição de sementes é um procedimento recomendado para avaliar o vigor de sementes, porém, ainda não se tem um procedimento padrão para diversas espécies. Objetivou-se determinar o tempo e a temperatura adequadamente combinados para o teste de condutividade elétrica em sementes de sorgo (Sorghum bicolor L.). A conditividade elétrica da água de embebição foi medida usando um condutivímetro, com temperatura na estufa encubadora BOD de 20, 25 e 30 °C em períodos de 2, 4, 8, 16, 20 e 24 horas usando 50 e 25 mL de água destilada. O experimento foi d

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Zhang, Dingyang, Wanghua Sui, and Jiawei Liu. "Investigation on the Influence of Temperature and Confining Pressure on the Hydraulic Conductivity of the Integrated and Fractured Jurassic Conglomerates." Geofluids 2021 (June 22, 2021): 1–13. http://dx.doi.org/10.1155/2021/8858030.

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This paper presents an experimental investigation on the properties of hydraulic conductivity and permeability of conglomerates under different temperatures and confining pressures with integrated samples and samples with shear failure. Constant head tests were carried out in a temperature-controlled triaxial cell with samples obtained from the Zhuxianzhuang Coal Mine. Five levels of temperatures (10°C, 20°C, 28°C, 35°C, and 50°C) and three levels of confining pressures (3 MPa, 5 MPa, and 7 MPa) were chosen for the tests. The results show that there is a negative relationship between hydraulic

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Guerrero, Joshua Martin, Frédéric Deschamps, Yang Li, Wen-Pin Hsieh, and Paul James Tackley. "Influence of heterogeneous thermal conductivity on the long-term evolution of the lower-mantle thermochemical structure: implications for primordial reservoirs." Solid Earth 14, no. 2 (2023): 119–35. http://dx.doi.org/10.5194/se-14-119-2023.

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Abstract. The long-term evolution of the mantle is simulated using 2D spherical annulus geometry to examine the effect of heterogeneous thermal conductivity on the stability of reservoirs of primordial material. Often in numerical models, purely depth-dependent profiles emulate mantle conductivity (taking on values between 3 and 9 Wm-1K-1). This approach synthesizes the mean conductivities of mantle materials at their respective conditions in situ. However, because conductivity also depends on temperature and composition, the effects of these dependencies on mantle conductivity are masked. Thi

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Irani, Mazda, and Marya Cokar. "Discussion on the Effects of Temperature on Thermal Properties in the Steam-Assisted-Gravity-Drainage (SAGD) Process. Part 1: Thermal Conductivity." SPE Journal 21, no. 02 (2013): 334–52. http://dx.doi.org/10.2118/178426-pa.

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Summary Steam-assisted gravity drainage (SAGD) is the preferred thermal-recovery method used to produce bitumen from Athabasca deposits in Alberta, Canada. In SAGD, steam injected into a horizontal injection well is forced into the reservoir, losing its latent heat when it comes into contact with cold bitumen at the edge of a depletion chamber. Heat energy is transferred from steam to reservoir, resulting in reduced bitumen viscosity that enables the bitumen to flow toward the horizontal production well under gravity forces. Conduction is the main heat-transfer mechanism at the edge of the ste

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Молодец, А. М., та А. А. Голышев. "Объемно-температурная зависимость электро- и теплофизических свойств alpha-железа при высоких давлениях и температурах". Журнал технической физики 91, № 9 (2021): 1403. http://dx.doi.org/10.21883/jtf.2021.09.51220.104-21.

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Modification of the semiempirical description of the volume-temperature dependence of the electrical conductivity and thermal conductivity of alpha-iron (iron having a body-centered cubic lattice structure) is presented. The interpolation of the volume-temperature dependences of the resistivity and thermal conductivity of alpha-iron along high-temperature isobars and high-pressure isotherms in the pressure range from -5 GPa to +5 GPa and temperatures of 400-800 K is considered for the conditions of normal and emergency operation of iron alloys. The interpolation of the electro-and thermophysic

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Ostafiichuk, B. K., I. M. Basyuk, L. S. Kaikan, V. V. Ugorchuk, and I. O. Sulym. "Dielectric qualities of lithium iron spineless doped by ion Mg+ on basis of impedance temperature researches." Electrochemical Energetics 11, no. 1 (2011): 18–25. http://dx.doi.org/10.18500/1608-4039-2011-11-1-18-25.

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Cite measuring result spectrum impedance of poly crystalline samples Mg-rcplacc lithium-iron spinel structure Li0 5l;c24Mg01O4 in the frequency range И>2 105 Hz in temperature range 295 723K. Displayed, that conduct temperature dependence real part of dielectric conductivity from temperature affirm about process activation electron transition between ions of iron varied valence and accompany reorientation dipole in variable field. At high temperatures (T> 573K) make apparent dominating contribution of electro conductivity on direct current. Activation energy of conductivity in low (295 4

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Gao, Junhua, Xiaofeng Zhao, Zhengfu Cheng, and Liangliang Tian. "Theoretical Study on the Influence of the Anharmonic Effect on the Ionic Conductivity and Thermal Stability of 8 mol% Yttria-Stabilized Zirconia Solid Electrolyte Material." Materials 16, no. 15 (2023): 5345. http://dx.doi.org/10.3390/ma16155345.

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YSZ is a promising material for resistive memory devices due to its high concentration of oxygen vacancies, which provide the high anion migration rates crucial for the manifestation of resistance switching in metal oxides. Therefore, investigating the ionic conductivity of YSZ is an important issue. The ionic conductivity and thermal stability of 8 mol% YSZ were studied using the theories and methods of solid-state physics and physical chemistry. The impact of anomalous atomic vibrations on the material was also explored, and the variation in the ion vibration frequency, electrical conductivi

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Y, Gololobov, та Borovoy N. "INFLUENCE OF THE X-RAY IRRADIATION ON A CRYSTALS β-TlInS2 POLITIPES CONDUCTIVITY". National Transport University Bulletin 1, № 48 (2021): 101–8. http://dx.doi.org/10.33744/2308-6645-2021-1-48-101-108.

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It was investigated the influence of temperature changes on conductivity of a non-irradiated and X- ray radiated samples of e-TlInS2 crystals polytypies. Object of the study - irradiated and radiated samples of e-TlInS2 crystals polytypes. Purpose of the study - experimental investigation conductivity temperature dependences on the DC (direct current) e-TlInS2 crystals irradiated and X-ray radiated С- and 2С- polytypes. Method of the study - the temperature dependence of electrical conductivity on DC was experimentally investigated in temperature range Т = 100-300 K for the non-irradiated and

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Secco, R. A., and P. S. Balog. "On the possibility of anisotropic heat flow in the inner core." Canadian Journal of Earth Sciences 38, no. 6 (2001): 975–82. http://dx.doi.org/10.1139/e00-116.

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We consider the possibility of anisotropic heat flow in the inner core by examining the potential for anisotropic thermal conductivity of hexagonal close-packed (hcp-)Fe. Because hcp-Fe exists only at pressures above 13 GPa at room temperature, we investigate thermal conductivity anisotropy in analog material Gd by measuring the electrical conductivity and applying the WiedemannFranz Law to determine thermal conductivity (k). The electrical conductivity anisotropy of Gd was measured at pressures up to 1.4 GPa and temperatures up to 873 K in the hcp phase range. At elevated pressure, the varia

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Yousefi, Y., and F. Tariku. "Thermal Conductivity and Specific Heat Capacity of Insulation materials at Different Mean Temperatures." Journal of Physics: Conference Series 2069, no. 1 (2021): 012090. http://dx.doi.org/10.1088/1742-6596/2069/1/012090.

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Abstract Thermal conductivity and heat capacity are among the most essential properties of a building insulation in calculating thermal performance which are subjected to change when exposed to temperatures variation in service. Ignoring the temperature dependency of these material properties can result in under and over estimations of buildings energy uses and the corresponding equipment sizing. To obtain more realistic conductivity values of insulation materials, in this paper, thermal conductivity tests are conducted at various mean temperatures. For the study six commonly used insulations

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Ibragimov, N. Yu, and E. N. Ibragimli. "EXPERIMENTAL STUDY OF THE THERMAL CONDUCTIVITY OF THE GLASS COATING OF THE PIPE." Steklo i Keramika, no. 7 (July 2022): 9–14. http://dx.doi.org/10.14489/glc.2022.07.pp.009-014.

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An experimental study of the thermal conductivity coefficient of glass coatings of pipes has been carried out. A device for experimental study of the thermal conductivity of the glass-coating of the pipe has been developed. To a greater extent than the composition, the thermal conductivity of glass depends on the temperature. It has been established that the thermal conductivity of the glass coating increases by several tenths of a watt with an increase in temperature up to 600 ?C. Studies have shown that an increase in the temperature of a glass coating leads to a slight improvement in its th

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Konstantinov, V. A., V. G. Manzhelii, V. P. Revyakin, and S. A. Smirnov. "Isochoric thermal conductivity of solid freons CF2CI2 and CHF2CI of methane series." Low Temperature Physics 21, no. 1 (1995): 78–81. https://doi.org/10.1063/10.0033761.

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The isochoric thermal conductivity and thermal pressure of solid freons CF2Cl2 and CHF2Cl of the methane series are studied at premelting temperatures. It is found that the thermal conductivity of CHF2Cl increases weakly with temperature, while for CF2Cl2 it remains practically constant. These parameters are compared with those for other freons of the methane series. The relation between the temperature dependence of thermal conductivity and the orientational motion of molecules is considered. It is shown that the behavior of isochoric thermal conductivity in orientationally ordered phases is

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Donovan, Ryan, Karyanto Karyanto, and Ordas Dewanto. "STUDI SIFAT TERMAL BATUAN DAERAH LAPANGAN PANAS BUMI WAY RATAI BERDASARKAN PENGUKURAN METODE KONDUKTIVITAS TERMAL." Jurnal Geofisika Eksplorasi 4, no. 3 (2020): 103–19. http://dx.doi.org/10.23960/jge.v4i3.44.

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Research on Way Ratai geothermal field has been done by measuring the thermal conductivity method. The thermal conductivity data is used to generate a map of the dispersion of heat conductively conductive rocks in the geothermal system. The result of measurement by thermal conductivity method in Way Ratai geothermal field is data of k (conductivity), Rt (thermal resistivity), and T (temperature). The value of the measured conductivity data in the geothermal field has range between 0.056-0.664 W/mK, the measured thermal resistivity value has range between 1.344-17.527mK/W, and the measured temp

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40

Sitnikov, M. N., A. M. Kharkov, H. Abdelbaki, N. A. Cheremnykh, R. V. Runov, and P. P. Mashkov. "Electrical properties and Raman spectra in Ho_xMn_1-xS solid solution." Journal of Physics: Conference Series 2373, no. 3 (2022): 032002. http://dx.doi.org/10.1088/1742-6596/2373/3/032002.

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Abstract The conductivity of the HoxMn1-xS (0 < x ≤ 0.3) solid solution in the range of temperatures 80 K – 1000 K were measured. Step like temperature dependence and extremum conductivity at high temperature were found. The temperature dependence of Raman spectra in the frequency interval 100 cm−1 – 900 cm−1 in the 300K – 900K range temperature has been investigated in the of HoxMn1-xS solid solutions. Several oscillation modes have been detected. The intensity and frequency shift of temperature fluctuations are determined. A new Raman mode appearing at high temperature T > 660 K was es

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Ganji, Domiri, Ziabkhsh Ganji, and Domiri Ganji. "Determination of temperature distribution for annular fins with temperature dependent thermal conductivity by HPM." Thermal Science 15, suppl. 1 (2011): 111–15. http://dx.doi.org/10.2298/tsci11s1111g.

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In this paper, homotopy perturbation method has been used to evaluate the temperature distribution of annular fin with temperature-dependent thermal conductivity and to determine the temperature distribution within the fin. This method is useful and practical for solving the nonlinear heat transfer equation, which is associated with variable thermal conductivity condition. The homotopy perturbation method provides an approximate analytical solution in the form of an infinite power series. The annular fin heat transfer rate with temperature-dependent thermal conductivity has been obtained as a

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Bektenov, N., K. Tlebaev, A. Kupchishin, B. Saburov, and N. Zhanpeisov. "STRUCTURE OF POLYTETRAFLUOROETHYLENE FILM AFFECTED BY ELECTRON RADIATION AND TEMPERATURES." Chemical Journal of Kazakhstan, no. 4 (December 15, 2024): 35–45. https://doi.org/10.51580/2024-4.2710-1185.46.

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The thermal conductivity of the polytetrafluoroethylene film in the temperature range of 80–330 K and radiation doses from 5 to 30 kGy was investigated. Methodology. Thermal conductivity studies were carried out at the TAU–5 thermophysical facility. Results. The temperature dependence of the thermal conductivity of polytetrafluoroethylene at different irradiation doses was obtained, and the resulting thermal conductivity curves demonstrate phase transitions at temperatures T1 = 293 K and T2 = 303 K. The irradiation of polytetrafluoroethylene films with low doses resulted in a shift of phase tr

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Wu, Jie, Nitin P. Padture, Paul G. Klemens, et al. "Thermal conductivity of ceramics in the ZrO2-GdO1.5system." Journal of Materials Research 17, no. 12 (2002): 3193–200. http://dx.doi.org/10.1557/jmr.2002.0462.

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Low thermal conductivity ceramics in the ZrO2–GdO1.5 system have potential in structural (refractories, thermal barrier coatings, thermal protection) and nuclear applications. To that end, the thermal conductivities of hot-pressed xGdO1.5 ·(1 – x)ZrO2 (where x = 0.05, 0.15, 0.31, 0.50, 0.62, 0.75, 0.89, and 1.00) solid solutions were measured, for the first time, as a function of temperature in the range 25 to 700 °C. On the ZrO2-rich side, the thermal conductivity first decreased rapidly with increasing concentration of GdO1.5 and then reached a plateau. On the GdO1.5-rich side, the decrease

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Ji, Yadong, Kaipeng Zhu, Chao Lyu, et al. "Semiempirical Correlation between P-Wave Velocity and Thermal Conductivity of Frozen Silty Clay Soil." Shock and Vibration 2021 (April 12, 2021): 1–7. http://dx.doi.org/10.1155/2021/5533696.

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In this study, the thermal conductivity and P-wave velocity of silty clay soil with different water contents are investigated through experiments at different temperatures, and a theoretical correlation between thermal conductivity and wave velocity is established. With temperature decline, the unfrozen water content is reduced and frost heave cracks propagate in soil samples. The variations in thermal conductivity and P-wave velocity are summarized as four phases. The freezing temperature of silty clay soil is between −2°C and −4°C. There is an inversely proportional relationship between ther

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Wang, Chang-Ren, and Shui-Tien Lin. "Low-Temperature Conductivity of Al70Pd22.5Re7.5Quasicrystals." Journal of the Physical Society of Japan 68, no. 12 (1999): 3988–93. http://dx.doi.org/10.1143/jpsj.68.3988.

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Chainani, A., D. D. Sarma, I. Das, and E. V. Sampathkumaran. "Low-temperature electrical conductivity of." Journal of Physics: Condensed Matter 8, no. 43 (1996): L631—L636. http://dx.doi.org/10.1088/0953-8984/8/43/001.

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Love, P. "Temperature dependence of electrical conductivity." Synthetic Metals 19, no. 1-3 (1987): 117–22. http://dx.doi.org/10.1016/0379-6779(87)90341-9.

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Gilabert, A., M. Khatami, S. Berthier, J. Lafait, and P. Nédellec. "Low temperature conductivity of cermets." Physica A: Statistical Mechanics and its Applications 157, no. 1 (1989): 223–29. http://dx.doi.org/10.1016/0378-4371(89)90306-3.

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Qiu, Heming, Shuyun Zhu, Han Fang, and Xiangcheng Lu. "Study of Seepage Laws of Deep Rock Mass Under Different Water Temperatures Based on Porous Media." Water 17, no. 3 (2025): 357. https://doi.org/10.3390/w17030357.

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Deep coal mining is faced with high temperature, high seepage pressure, and high ground stress, and there is a complex nonlinear coupling relationship between the temperature of water in deep rock mass and its seepage. Based on the background of deep mining in Zhaolou Coal Mine in Shandong Province, China, the hydraulic conductivity of artificial rock samples with similar materials was tested indoors under different water temperatures of 30~80 °C. On the basis of deep rock samples collected in the field, the hydraulic conductivity has a nonlinear positive correlation with the rise of water tem

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Wang, Jie, Chao Li, Yunhe Sheng, Yu Su, and Lina Yang. "Cross-scale investigation of the size effect on thermal conductivity of monolayer graphene." Applied Physics Letters 121, no. 4 (2022): 042202. http://dx.doi.org/10.1063/5.0096870.

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It is known that the intrinsic thermal conductivity of a monolayer graphene highly depends on its in-plane dimensions which are at nanoscale. However, it remains not very clear how the thermal conductivity is quantitatively affected as the considered in-plane size undergoes a cross-scale variation, especially when temperature influence is involved. In this study, based on the ballistic-diffusion approximation theory, we propose a cross-scale model that can be used to calculate the thermal conductivity of monolayer graphene with prescribed length and width at selected temperatures by considerin

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