Citations with the tag: MATERIALS -- Thermal properties
Results 1 - 50
- National Metrological Institutes.
// High Temperatures -- High Pressures; 2010, Vol. 39 Issue 2, preceding p83
An introduction to the journal is presented in which the editor cites the task of the National Metrology Institutes (NMIs), and provides an overview of the 18th European Conference in Thermophysical Properties in Pau.
- On the Thermophoretic Motion of a Heated Spherical Drop in a Viscous Liquid.
Malai, N. V. // Technical Physics; Nov2002, Vol. 47 Issue 11, p1380
Expressions for the force and velocity of the thermophoretic motion of a spherical drop in a viscous liquid are derived for arbitrary temperature differences between the surface ofthe drop and regions away from it. The temperature dependence of the viscosity is taken into account in the form of...
- Thermodynamic properties of 1,1,1,2-tetrafluoroethane + polyether mixtures up to 60 MPa.
Comu�as, M. J. P.; Boned, C.; Baylaucq, A.; L�pez, E. R.; Fern�ndez, J. // Canadian Journal of Chemistry; Aug2004, Vol. 82 Issue 8, p1271
In this work we report several derived thermodynamic properties, the isothermal compressibility (?T), the isobaric thermal expansion coefficient (ap), and the internal pressure (p), and their excess functions (?TE, apE, and pE) for the refrigerant + lubricant mixtures HFC-134a + triethylene...
- Coffee-Can "ASTRONAUT".
Comu�as, M. J. P.; Boned, C.; Baylaucq, A.; L�pez, E. R.; Fern�ndez, J. // Science World (Teacher's Edition); 10/15/2001, Vol. 58 Issue 4, p5
Presents an experiment on how different colors, surfaces and materials with thermal and insulating properties affect an object's ability to absorb and radiate heat.
- Methods of Determining the Characteristics of Dispersed Media at a Phase Transition.
Permyakov, P. P. // Russian Physics Journal; Mar2004, Vol. 47 Issue 3, p240
Gradient methods of determining the thermophysical characteristics of dispersed media at phase transitions are suggested. The reliability and the rate of convergence of the suggested methods are tested for a model problem. A comparison of the results of reconstructing the thermophysical...
- Epitaxial Pb--Fe--O film with large planar magnetic anisotropy on (0001) sapphire.
Dorsey, P.C.; Qadri, S.B. // Applied Physics Letters; 3/3/1997, Vol. 70 Issue 9, p1173
Examines epataxial lead-iron-oxide films through large planar magnetic anisotropy onto single-crystal (0001) substrates. Results of film composition and thickness measurements; Structure and out-plane orientation of lead films; Analysis of hysteresis curves of lead...films.
- Activation energy and enthalpy of decomposition for the Fe17Sm2 nitride.
Cabral, F.A.O.; Gama, S. // Journal of Applied Physics; 4/17/1997, Vol. 81 Issue 8, p5109
Reports that decomposition studies of the Fe17Sm2N3 compound were performed with the use of a Calvet-type microcalorimeter and simultaneous gravimetric and differential thermal analyzer (DTA). Onset temperature of decomposition; Enthalpy associated with the decomposition.
- Dependence of the ferrimagnetic resonance linewidth on sintering conditions in manganese ferrite.
Flores, A. G.; Raposo, V. // Journal of Applied Physics; 2/15/1999, Vol. 85 Issue 4, p2293
Provides information on a study which presented the variation of the ferrimagnetic resonance linewidth with temperature in both single and polycrystalline manganese ferrites. Sample preparation; Measurement system; Results and discussion.
- Extension of the Wu—Jing equation of state for highly porous materials: Thermoelectron based theoretical model.
Huayun, Geng; Qiang, Wu; Hua, Tan; Lingcang, Cai; Fuqian, Jing // Journal of Applied Physics; 11/15/2002, Vol. 92 Issue 10, p5924
A thermodynamic equation of state (EOS) for thermoelectrons is derived which is appropriate for investigating the thermodynamic variations along isobaric paths. By using this EOS and the WuJing (WJ) model, [Q. Wu and F. Jing J. Appl. Phys. 80, 4343 (1996)] an extended Hugoniot EOS model is...
- Extension of the Wu—Jing equation of state for highly porous materials: Calculations to validate and compare the thermoelectron model.
Huayun, Geng; Qiang, Wu; Hua, Tan; Lingcang, Cai; Fuqian, Jing // Journal of Applied Physics; 11/15/2002, Vol. 92 Issue 10, p5917
In order to verify and validate the newly developed thermoelectron equation of state (EOS) model that is based on the Wu-Jing EOS [J. Appl. Phys. 80, 4343 (1996); Appl. Phys. Lett. 67, 49 (1995)], calculations of shock compression behavior have been made on five different porous metals: iron,...
- New Nanomaterial Maintains Conductivity in Three Dimensions.
Huayun, Geng; Qiang, Wu; Hua, Tan; Lingcang, Cai; Fuqian, Jing // Chemical Engineering World; Sep2015, Vol. 50 Issue 9, p24
The article focuses on the development of a one-step process for making seamless carbon-based nanomaterials with superior thermal and mechanical properties.
- Effect of thermal nonlinearity in high-absorption media on the parameters of the photoacoustic signal detected by the gas microphone method: The fundamental and second harmonics.
Madvaliev, U.; Salikhov, T.Kh; Sharifov, D.M. // Technical Physics; Jun2006, Vol. 51 Issue 6, p765
A perturbation theory is put forward that describes the effect of thermal nonlinearity due to the temperature dependence of the thermophysical parameters of high-absorption systems with a low thermal conductivity on the parameters of the photoacoustic signal detected by the gas microphone...
- Thermophysical properties affecting safety and performance of nuclear fuel.
Ronchi, Claudio // High Temperature; Jul2007, Vol. 45 Issue 4, p552
Improvement of the nuclear fuel exploitation has been one of the main objectives of reactor technology during the last decades. Today, in view of a sustainable nuclear energy production, development of advanced reactors re-proposes the choice of innovative fuel cycle concepts, in a context of...
- Facility for integrated studies of thermophysical characteristics of electrically conducting materials by the method of subsecond resistance heating.
Peletskii, V.; Sizov, V.; Saakyan, A.; Shur, B. // High Temperature; Jun2010, Vol. 48 Issue 3, p441
An experimental facility for the investigation of temperature dependence of the thermophysical properties of structural materials is described. The enthalpy, heat capacity, electrical resistance, and integral and spectral emissivities are determined under conditions of heating modes with rates...
- Solid-like rheological response of non-entangled polymers in the molten state.
Mendil, H.; Baroni, P.; Noirez, L. // European Physical Journal E -- Soft Matter; Jan2006, Vol. 19 Issue 1, p77
We show that non-entangled polymers display an elastic-like behaviour at a macroscopic scale (probed at some 0.100 mm thickness) up to at least hundred degrees above the glass transition temperature. This observation, found under non-slippage conditions, both for side-chain liquid crystalline...
- Prediction of the temperature dependence of fracture toughness of 12Crï¿½2Niï¿½Mo refractory steel.
Pokrovskii, V.; Kulishov, S.; Sidyachenko, V.; Ezhov, V.; Zamotaev, V. // Strength of Materials; Jul2009, Vol. 41 Issue 4, p399
We study the influence of temperature and the size of the specimens on the characteristics of static crack resistance of 12Crï¿½2Niï¿½Mo refractory steel. It is shown that, in the temperature range 20ï¿½450ï¿½C, the increase in the thickness of specimens leads to an insignificant...
- Triple crystallization behavior of fractionated ethylene/a-olefin copolymers of different catalyst type.
Tarasova, E.; Poltim�e, T.; Krumme, A.; Lehtinen, A.; Viikna, A. // Journal of Polymer Research; Feb2011, Vol. 18 Issue 2, p207
Non-isothermal crystallization processes in fractions of Ziegler-Natta (ZN) and single site (SS) based ethylene/1-butene and ethylene/1-hexene copolymers have been studied by differential scanning calorimetry (DSC). Fractionation of used copolymers was done according to molar mass (MM) and...
- Model for Cuboid Shape Samples and its Analysis Used for Measurements of Thermophysical Properties of Sandstone.
Boh�c, V.; Vreten�r, V.; Greif, V. // Measurement Science Review; 2011, Vol. 11 Issue 6, p192
A new model for the sample of square cross section with cuboid geometry including the effect of heat loss from the surface of the sample was tested using the theory of sensitivity coefficients. Theoretical calculation of model uncertainty and derived analytical formulas are presented. Results of...
- Synthesis, Characterization and Thermodynamic Parameters of Poly(3-mesityl-2-oxopropyl methacrylate).
A�ikses, Aslisah; Aksar, Serkan // Turkish Journal of Science & Technology; Dec2009, Vol. 4 Issue 2, p127
Poly(3-mesityl-2-oxopropyl methacrylate)[poly(MOPMA)] was prepared in presence of 1,4-dioxane solution using 2,2'-azobisisobutyronitrile (AIBN) as initiator at 60 ï¿½C. The poly(MOPMA) was characterized by 1H and 13C-NMR, FT-IR, GPC, DSC and TGA techniques. The thermodynamic properties of...
- Bond Strength-Coordination Number Fluctuation Model of Viscosity: An Alternative Model for the Vogel-Fulcher-Tammann Equation and an Application to Bulk Metallic Glass Forming Liquids.
Ikeda, Masahiro; Aniya, Masaru // Materials (1996-1944); Dec2010, Vol. 3 Issue 12, p5246
The Vogel-Fulcher-Tammann (VFT) equation has been used extensively in the analysis of the experimental data of temperature dependence of the viscosity or of the relaxation time in various types of supercooled liquids including metallic glass forming materials. In this article, it is shown that...
- Thermal relaxation phenomena across the metal/window interface and its significance to shock temperature measurements of metals.
Tang, Wenhui; Jing, Fuqian; Zhang, Ruoqi; Hu, Jinbiao // Journal of Applied Physics; 9/15/1996, Vol. 80 Issue 6, p3248
Discusses the difficulties in connection with the radiometry measurement of shock temperatures for metals, due to our insufficient knowledge of the high-pressure thermophysical properties of materials. Information on shock temperature measurement; Schematic of experimental setup used for...
- The metrological platform of LNE for measuring thermophysical properties of materials.
HAY, BRUNO; HAMEURY, JACQUES; FILTZ, JEAN-R�MY; HALOUA, FR�D�RIQUE; MORICE, RONAN // High Temperatures -- High Pressures; 2010, Vol. 39 Issue 3, p181
As National Metrology Institute (NMI), LNE has been developing for many years comprehensive and high accurate facilities (a number being unique within France) for measuring the main thermophysical properties of materials (thermal diffusivity, thermal conductivity, specific heat, gross calorific...
- Scenario-based touching: on the influence of top-down processes on tactile and visual appreciation.
Jakesch, Martina; Zachhuber, Martina; Leder, Helmut; Spingler, Mark; Carbon, Claus-Christian // Research in Engineering Design; Jul2011, Vol. 22 Issue 3, p143
The aim was to propose a testing procedure that allows measuring ecological valid judgments as a tool for selecting e.g. surface materials in the design process. Precise measures are essential for evaluation processes for example in design research and applied studies. Contextual effects in form...
- An Investigation of the Thermophysical Properties of a Liquid in a Flow Using the Method of Pulse Heating.
Tarzimanov, A. A.; Gabitov, F. R. // High Temperature; Mar/Apr2004, Vol. 42 Issue 2, p231
The theoretical principles are described of measuring the thermophysical properties of a liquid in a flow during a short pulse of heating a quick-response probe. A plane probe and a linear probe are used to measure the thermal activity, thermal conductivity, thermal diffusivity, and kinematic...
- Thermoacoustic Waves Arising under Conditions of Heating a Perfect Viscous Gas.
Zubkov, P. T.; Sviridov, E. M.; Gubaidullin, A. A. // High Temperature; Sep/Oct2004, Vol. 42 Issue 5, p756
We used the control volume approach and a modified SIMPLER algorithm to numerically solve a fully formulated unsteady-state problem on the heating of a perfect gas in a plane confined layer.
- Effects of Interphase Heat Transfer and Surface Tension on Nonlinear Wave Propagation in a Gas-Liquid Mixture.
Oganyan, G. G. // Fluid Dynamics; Sep/Oct2003, Vol. 38 Issue 5, p724
An evolutionary equation with two nonlinearities (basic hydrodynamic and an additional nonlinearity attributable to interphase heat transfer) describing the wave dynamics in a mixture in the presence of viscosity is obtained. For a quasi-adiabatic regime, depending on the heat transfer laws...
- Development of low-melting glasses for decorating facing materials.
Pavlushkina, T. K.; Morozova, I. V. // Glass & Ceramics; Mar2010, Vol. 67 Issue 3/4, p86
The compositions of low-melting glasses based on the sodium-borosilicate system are developed. It effect of the composition on the thermal properties of the glasses is studied. It is shown that the wastes from electrochemical production processes can be used instead of the conventional raw...
- Coatings Keep Things Cool: White Coatings Alleviate Summer Temperature Spikes.
Meyer, Tom; Heinje, Steve // Environmental Design & Construction; Oct2006, Vol. 9 Issue 9, ps18
The article provides information about white coatings that is being used in roofs of buildings in the U.S. White coatings consist of organic or silicone polymer which is blended with pigments and additives to provide protection to roof membranes and to reflect solar radiation. The environmental...
- Making the Case for Cool Roofs: Environmentally Friendly Roofing Takes Off.
Meyer, Tom; Heinje, Steve // Environmental Design & Construction; Oct2006, Vol. 9 Issue 9, ps21
The article provides information about cool roofs in the U.S. The expansion of the program on the use of cool roofs products is being promoted by the Cool Roof Rating Council and the Environmental Protection Agency with its Energy StarÂ® Reflective Roof Products program. It is said that cool...
- Simpler method for volatile medium pump mechanical seals.
Peng, X. D.; Xie, Y. B.; Gu, Y. Q. // Proceedings of the Institution of Mechanical Engineers -- Part J; Nov2006, Vol. 220 Issue 7, p643
Mechanical face seals operating with volatile media, such as liquid ammonia, hot water, and light hydrocarbons, generally fail as a result of phase state instability of the fluid film between the two faces. Therefore, determining face temperature and identifying phase states and phase state...
- Thermophysical studies of radwaste repository covers.
Veselov, E.; Rybakov, A. // Atomic Energy; Oct2011, Vol. 110 Issue 6, p405
This article is devoted to thermophysical studies of a multifunctional cover consisting of natural and artificial materials of a 2.8 m thick near-surface repository. The objectives were to determine the maximum depth of the frost zone and to evaluate the changes of the thermophysical properties...
- Influence of External Plasticization on Rheological and Thermal Properties of Cellulose Acetate with Respect to Its Foamability.
Zepnik, Stefan; Kabasci, Stephan; Radusch, Hans-Joachim; Wodke, Thomas // Journal of Materials Science & Engineering A; 2012, Vol. 2 Issue 2, p152
Cellulose acetate needs appropriate plasticization for proper processing and achieving suitable properties. At thermoplastic foam production via melt technologies rheological and thermal properties are key factors for the generation of high quality products. Therefore, the influence of external...
- Gas flow through a porous heat-releasing medium with allowance for the temperature dependence of gas viscosity.
Levin, V. A.; Lutsenko, N. A. // Journal of Engineering Physics & Thermophysics; Jan2006, Vol. 79 Issue 1, p33
The gas flow through a porous heat-releasing medium is considered. It has been noted that account for the temperature dependence of the gas viscosity strongly influences the solution: the gas flow rate markedly decreases and a stronger heating occurs. Analysis of the flow of a gas with a...
- A ten-year perspective on dilute magnetic semiconductors and oxides.
Dietl, Tomasz // Nature Materials; Dec2010, Vol. 9 Issue 12, p965
Over the past ten years, the search for compounds combining the properties of semiconductors and ferromagnets has evolved into an important field of materials science. This endeavour has been fuelled by many demonstrations of remarkable low-temperature functionalities in the ferromagnetic...
- Thermal expansion of Ti-substituted barium hexaferrite.
Hernandez-Gomez, P.; de Francisco, C. // Journal of Applied Physics; 4/1/2000, Vol. 87 Issue 7, p3576
Presents information on a study which measured the thermal expansion of titanium-substituted barium hexaferrite single crystals. Anisotropic behavior of magnetoplumbite hexaferrites.
- Dielectric properties of two-phase and porous ferriferous glasses.
Koroleva, Ekaterina; Burdin, Dmitrii; Antropova, Tatyana; Porechnaya, Nadezda; Naberezhnov, Alexander; Anfimova, Irina; Pschenko, Olga // Optica Applicata; 2012, Vol. 42 Issue 2, p287
In the present contribution we have studied the dielectric properties of two-phase sodium borosilicate glasses doped by iron oxide and of porous media based on them. The temperature dependences of dielectric permittivity and conductivity for all samples have been obtained, and the impedance...
- Thermal conductivity of porous materials.
Smith, David S.; Alzina, Arnaud; Bourret, Julie; Nait-Ali, Benoît; Pennec, Fabienne; Tessier-Doyen, Nicolas; Otsu, Kodai; Matsubara, Hideaki; Elser, Pierre; Gonzenbach, Urs T. // Journal of Materials Research; Sep2013, Vol. 28 Issue 17, p2260
Incorporation of porosity into a monolithic material decreases the effective thermal conductivity. Porous ceramics were prepared by different methods to achieve pore volume fractions from 4 to 95%. A toolbox of analytical relations is proposed to describe the effective thermal conductivity as a...
- Temperature dependence of the 90Â° coupling in Fe/Al/Fe(001) magnetic trilayers.
Filipkowski, M. E.; Gutierrez, C. J.; Krebs, J. J.; Prinz, G. A. // Journal of Applied Physics; 5/15/1993, Vol. 73 Issue 10, p5963
Presents a study which determined the temperature dependence of the 90Â° coupling in iron/aluminum/iron (001) magnetic trilayers. Analysis of the occurrence of second-order transitions; Numerical calculations; Results and discussion.
- Impact of thermal stress on the piezoelectric and dielectric properties of PbTiO3 thick films on various substrates.
Gang Bai; Zhiguo Liu; Xiaobing Yan; Changchun Zhang // Journal of Applied Physics; 2014, Vol. 116 Issue 5, p054103-1
The impact of thermal stress on the polarization, as well as dielectric and piezoelectric properties of (001) oriented PbTiO3 (PTO) thick films deposited on various substrates was investigated based on Landau-Devonshire thermodynamic model. The results showed that dielectric and piezoelectric...
- Dynamic properties of excitons in ZnO/AlGaN/GaN hybrid nanostructures.
Forsberg, Mathias; Hemmingsson, Carl; Amano, Hiroshi; Pozina, Galia // Scientific Reports; 1/23/2015, p7889
Hybrid samples based on ZnO colloidal nanocrystals (NCs) deposited on AlGaN/GaN quantum well (QW) structures with different top barrier thickness d = 3, 6 and 9 nm are studied by time-resolved photoluminescence. Thermal behavior of the QW exciton lifetime in the hybrids and in the bare QW...
- Complementary photothermal techniques for complete thermal characterization of porous and semi-transparent solids.
Dadarlat, D.; Streza, M.; Onija, O.; Prejmerean, C.; Silaghi-Dumitrescu, L.; Cobirzan, N.; Strzałkowski, K. // Journal of Thermal Analysis & Calorimetry; Jan2015, Vol. 119 Issue 1, p301
The paper is focused on the ability of using two complementary photothermal techniques for the measurement of all thermal parameters of some porous and/or semi-transparent solid samples whose composition, structure, and geometry do not allow a complete thermal characterization using a single...
- A RESEARCH ON THERMAL INSULATION PROPERTIES OF NONWOVENS PRODUCED WITH RECYCLED JUTE AND WOOL FIBRES.
DURAN, Deniz // Journal of Textile & Apparel / Tekstil ve Konfeksiyon; 2016, Vol. 26 Issue 1, p22
Nonwovens materials are porous materials consisting of fibers and an interconnected void. Due to their unique fibre orientation and porous structure, nonwovens are ideal materials for insulation applications. In this paper some physical thermal insulation properties of single and double layered...
- Investigation of thermal effect on exterior wall surface of building material at urban city area.
Din, Mohd Fadhil Md.; Dzinun, Hazlini; Ponraj, M.; Chelliapan, Shreeshivadasan; Noor, Zainura Zainun; Remaz, Dilshah; Iwao, Kenzo // International Journal of Energy & Environment; 2012, Vol. 3 Issue 4, p531
This paper describes the investigation of heat impact on the vertical surfaces of buildings based on their thermal behavior. The study was performed based on four building materials that is commonly used in Malaysia; brick, concrete, granite and white concrete tiles. The thermal performances on...
- Cellular modes of filtration combustion.
Kostin, S. V.; Shkadinskiĭ, K. // Doklady Physics; Nov2010, Vol. 55 Issue 11, p533
The article presents a study which investigates the cellular modes of filtration combustion. It says that high-temperature synthesis of construction materials is conducted through filtration combustion of porous high energy compositions that interacts with an active gas reagent and forms...
- Fundamental parameters of heat and moisture transfer for energy efficiency in buildings.
Liuzzi, S.; Stefanizzi, P. // Key Engineering Materials; 2014, Vol. 632, p79
Heat and moisture transfer in a room is critical for the indoor comfort. This first chapter introduces the basic concepts of heat and moisture transfer in buildings, dealing with the main theoretic fundamentals. It focuses on the most common parameters, used to analyze heat and moisture transfer...
- An Empirical Validation of Modeling Solar Gains Through a Glazing Unit Using Building Energy Simulation Programs.
Loutzenhiser, Peter G.; Manz, Heinrich; Strachan, Paul A.; Felsmann, Clemens; Frank, Thomas; Maxwell, Gregory M.; Oelhafen, Peter // HVAC&R Research; Oct2006, Vol. 12 Issue 4, p1097
Empirical validation of building energy simulation tools is an important component in assessing the reliability of the simulation software. An experiment performed in conjunction with the International Energy Agency's Task 34/Annex 43 was used to assess the performance of four building energy...
- Modes of development of thermal explosion in slightly exothermic material-forming reactions.
Vadchenko, S. G. // Doklady Physical Chemistry; Aug2009, Vol. 427 Issue 2, p146
The article presents a study which examines the thermal explosion of slightly exothermic material-forming reactions such as the direct synthesis of different iron aluminides from elements under unstable temperature. Thermal explosion method is composed of pre-heating of mixture reactants to the...
- Equation of State for Lennard-Jones Fluid.
Boltachev, G. Sh.; Baidakov, V. G. // High Temperature; Mar/Apr2003, Vol. 41 Issue 2, p270
Cites a study determining the equation of state for Lennard-Jones potential. Recognition of Lennard-Jones potential as an effective potential of intermolecular interaction for simple liquids; Formulation of the equation of state in the form of a series expansion of pressure in terms of density...
- Wiedemann-Franz law for metal porous structures.
Gladkov, S. // High Temperature; Sep2006, Vol. 44 Issue 5, p687
Relations are obtained between the coefficients of thermal conductivity and conductivity for a metal porous medium. The Wiedemann-Franz law is analyzed in a wide range of variation of temperature and some of its special features are demonstrated which show up in the high-temperature region for...
- The scale for the size of critical clusters.
Cherevko, A. // High Temperature; Jul2007, Vol. 45 Issue 4, p575
The article presents a study on the scale for the size of critical clusters. The size of these clusters was identified during the condition when the temperature variations equate to the supercooling of the vapor-liquid system. Results of the study highlight the link between the thermophysical...