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.
- A thermophysical study of the melting process in alkyl chain metal...
Cheda, J.A.R.; Redondo, M.I.; Garcia, M.V.; de la Fuente, F.L. Lopez; Fernandez-Martin, F.; Westrum Jr., E.F. // Journal of Chemical Physics; 8/22/1999, Vol. 111 Issue 8, p3590
Reports on a thermophysical study of the melting process in alkyl chain metal thallium alkanoates. Recognition of the importance of the anomalous gradual enhancement in the heat-capacity curve; Methylene contribution to the lattice heat capacity; Phase behavior as function of chain length.
- Thermophysical characterization of artificially aged papers by means of the photothermal...
Bertolotti, M.; Ligia, S. // Journal of Applied Physics; 3/1/1999, Vol. 85 Issue 5, p2881
Presents information on a study which determined the thermophysical properties of artificially aged paper samples by means of photothermal deflection technique. Theory; Experimental results and discussion; Conclusions.
- 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...
- Determination of thermophysical parameters of porous silicon using a photothermal technique.
Abdalla, S.; Easawi, K.; Negm, S.; Youssef, G. M.; El-Brolossy, T. A.; Talaat, H. // Review of Scientific Instruments; Jan2003, Vol. 74 Issue 1, p848
The effective thermophysical properties, diffusivity (&alphas;), effusivity (e), and thermal conductivity (k) have been measured by photoacoustic (PA) and photothermal interferometry (PTI) for silicon samples of varying porosities. The experimental results show a reduction in the thermal...
- Photothermal techniques applied to thermophysical properties measurements (plenary).
Vargas, H.; Miranda, L. C. M. // Review of Scientific Instruments; Jan2003, Vol. 74 Issue 1, p794
In this article, we present a bird's eye view of applications of photothermal techniques for evaluation of the thermal properties of different materials. This is followed by the presentation of specific techniques for direct measurements of thermal diffusivity and thermal effusivity and indirect...
- High-temperature containerless calorimeter.
Robinson, Michael B.; Lacy, Lewis L. // Review of Scientific Instruments; Mar85, Vol. 56 Issue 3, p430
A high-temperature (> 1500 K) containerless calorimeter is described and its usefulness demonstrated. The calorimeter uses the technique of omnidirectional electron bombardment of pendant drops to achieve an isothermal test environment. The small heat input into the sample (i.e., 15�50 W) can...
- dc-ac hot-wire procedure for determining thermophysical properties under pressure.
Nilsson, O.; Sandberg, O.; B�ckstr�m, G. // Review of Scientific Instruments; Sep86, Vol. 57 Issue 9, p2303
The paper describes a new hot-wire method for simultaneous determination of thermal conductivity and heat capacity per unit volume of electrically insulating liquids and solids under pressure. The method uses dc heating of the hot wire, whereas the temperature increase is recorded by an ac...
- 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.
- Surface modifications and surface-protective coatings analyzed by means of thermal waves (invited) (abstract).
Bein, B. K.; Fotsing, J. L. N.; Gibkes, J.; Delgadillo-Holtfort, I.; Dietzel, D.; Pelzl, J. // Review of Scientific Instruments; Jan2003, Vol. 74 Issue 1, p800
The depth profiles of the thermophysical properties of alloy systems, for example, shape memory alloys (NiTi), steel, and tool steel, can vary considerably due to rolling, surface machining, heat treatment, mechanical wear, and erosion. The same is true for coated tool steel samples, which show...
- 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.
- Influence of heat treatment on the electrophysical properties of thin films of copper�indium diselenide.
Magomedov, M.-R. A.; Amirkhanova, Dzh. Kh.; Ismailov, Sh. M.; Khokhlachev, P. P.; Zubairuev, R. Z. // Technical Physics; Mar97, Vol. 42 Issue 3, p282
An investigation of the structural, electrical, optical, and thermophysical properties is carried out on thin polycrystalline films of the ternary semiconductor CuInSe[sub 2], which is potentially useful for fabricating solar cells. The thin films were obtained by thermal evaporation of...
- Crossover relations for �simple� systems in the critical region.
Neruchev, Yu.; Bolotnikov, M. // High Temperature; Jan2008, Vol. 46 Issue 1, p40
A differential relation is suggested, which relates the energy of intermolecular interaction (IMI) to the P-V-T parameters of a simple condensed system. This relation is used to derive crossover relations which describe the thermophysical properties of the liquid and vapor phases in the critical...
- Calculation of the thermophysical properties of ground state sodium atoms.
Holland, Paul M.; Biolsi, Louis // Journal of Chemical Physics; 7/15/1987, Vol. 87 Issue 2, p1261
Transport properties of dilute monatomic gases depend on the two body interaction potentials between the atoms. When two ground state sodium atoms interact, they can follow either of two potential energy curves corresponding to the Na2 molecule in the X 1S+g or the 3S+u state. Transport...
- Computer simulation study of the approximations associated with the generalized Flory theories.
Kumar, Sanat K.; Szleifer, Igal; Hall, Carol K.; Wichert, John M. // Journal of Chemical Physics; 6/8/1996, Vol. 104 Issue 22, p9100
The chain increment method and configurational bias Monte Carlo methods are used to test the approximations made in the derivation of the generalized Flory-Dimer (GF-D) theory for tangent hard sphere chains. Insertion probabilities and residual chemical potentials are calculated for hard chain...
- Nonlinear thermal response at the glass transition.
Schick, C.; Merzlyakov, M. // Journal of Chemical Physics; 8/8/1999, Vol. 111 Issue 6, p2695
Focuses on the description of frequency dependent heat capacity at the glass transition based on the Tool-Narayanaswamy-Moynihan approach of structural recovery. Measurement of the response at medium temperature amplitudes in the appearance of the first nonlinearities; Support for the...
- Temperature dependence of thermophysical properties of GaAs/AIAs periodic structure.
Yu, X.Y.; Chen, G. // Applied Physics Letters; 12/11/1995, Vol. 67 Issue 24, p3554
Investigates the temperature dependence of the thermophysical properties of gallium arsenide/aluminum arsenide periodic structure. Method used in measuring thermal diffusivity; Source of the structure's thermal conductivity; Assessment on the cause of reduction in thermal conductivity.
- Temperature determination in shocked condensed materials using Raman scattering.
Pangilinan, G.I.; Gupta, Y.M. // Applied Physics Letters; 2/24/1997, Vol. 70 Issue 8, p967
Examines the use of Raman scattering measurements in determining temperature in shocked condensed materials. Use of liquid carbon tetrachloride shocked to 12 giga Pascal; Changes in the ratio of antistokes to stokes intensities; Outline of procedures for obtaining precise temperatures.
- 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.
- 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...
- Surface Tension and Viscosity of Aluminum Oxide Nanofluids.
Zhu, D. S.; Wu, S. Y.; Wang, N. // AIP Conference Proceedings; 3/1/2010, Vol. 1207 Issue 1, p460
Nanofluid is a kind of new engineering material consisting of solid nanoparticles with sizes typically of 1�100 nm suspended in base fluids. Due to the importance of thermophysical property on the heat transfer behavior of fluids, the surface tension and viscosity of Al2O3-H2O nanofluids were...
- 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,...
- 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.
- Thermal Conductivity in Nanoporous Gold Films during Electron-Phonon Nonequilibrium.
Hopkins, Patrick E.; Norris, Pamela M.; Phinney, Leslie M.; Policastro, Steven A.; Kelly, Robert G. // Journal of Nanomaterials; 2008, p1
The reduction of nanodevices has given recent attention to nanoporous materials due to their structure and geometry. However, the thermophysical properties of these materials are relatively unknown. In this article, an expression for thermal conductivity of nanoporous structures is derived based...
- Dynamical heterogeneities below the glass transition.
Vollmayr-Lee, K.; Kob, W.; Binder, K.; Zippelius, A. // Journal of Chemical Physics; 3/22/2002, Vol. 116 Issue 12, p5158
We present molecular dynamics simulations of a binary Lennard-Jones mixture at temperatures below the kinetic glass transition. The 'mobility' of a particle is characterized by the amplitude of its fluctuation around its average position. The 5% particles with the largest/smallest mean amplitude...
- UNIFAC calculation of thermodynamic properties of binary 1-chloroalkane + alkane and a,?-dichloroalkane + alkane mixtures: Comparison with Nitta-Chao and DISQUAC predictions.
Garcia, J.; Lopez, E.R.; Comu�as, M.J.P.; Lugo, L.; Fernandez, J. // Canadian Journal of Chemistry; May2003, Vol. 81 Issue 5, p392
Determines the interaction parameters between chlorine and methylene groups. Application of several versions of UNIFAC model; Discussion on the results; Conclusion.
- Growth of congruently melting Ca0.59Sr0.41F2 crystals and study of their properties.
Karimov, D. N.; Komar'kova, O. N.; Sorokin, N. I.; Bezhanov, V. A.; Chernov, S. P.; Popov, P. A.; Sobolev, B. P. // Crystallography Reports; May2010, Vol. 55 Issue 3, p518
Homogeneous crystals of Ca0.59Sr0.41F2 alloy (sp. gr., Fm $$ \bar 3 $$ m, a = 0.56057 nm), corresponding to the point of minimum in the melting curve in the CaF2-SrF2 phase diagram, have been grown by the vertical Bridgman method. The optical, mechanical, electrical, and thermophysical...
- 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...
- Thermal conductivity and mechanical properties of expanded graphite.
Afanasov, I. M.; Savchenko, D. V.; Ionov, S. G.; Rusakov, D. A.; Seleznev, A. N.; Avdeev, V. V. // Inorganic Materials; May2009, Vol. 45 Issue 5, p486
The thermophysical and mechanical properties of compacted expanded graphite (EG) were studied. The experimental results were interpreted with application of similarity theory. The compacted EG critical density corresponding to the observed jump in the thermal conductivity coefficient and...
- 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...
- Microstructural investigations of XW-42 and M2 tool steels in semi-solid zones via direct partial remelting route.
Omar, M.; Alfan, A.; Syarif, J.; Atkinson, H. // Journal of Materials Science; Dec2011, Vol. 46 Issue 24, p7696
A suitable microstructure for thixoforming consists of spheroidal grains in a liquid matrix. In order to achieve this, some processing routes have been established. In this study, microstructural evolution of XW-42 and AISI M2 steels via direct partial remelting from the as-annealed condition...
- On the derivation of microhardness of amorphous blends of miscible polymers from glass transition temperature values.
Fakirov, S.; Calleja, F. J. Balta; Boyanova, M. // Journal of Materials Science Letters; Jul2003, Vol. 22 Issue 14, p1011
Discusses the derivation of the microhardness of any polymer blend of miscible partners from glass transition temperature, Tg values by simple use of both Gordon�Taylor�s and the hardness (H) equation. Calculation of the H value of an amorphous homo- or copolymer starting only from its Tg...
- Thermophysical properties in medium temperature range of several thio and dithiocarbamates.
Temprado, Manuel; Roux, Maria Victoria; Parameswar, Archana R.; Demchenko, Alexei V.; Chickos, James S.; Liebman, Joel F. // Journal of Thermal Analysis & Calorimetry; Feb2008, Vol. 91 Issue 2, p471
The present study reports a DSC study of the thio-and dithiocarbamates: 3 H-benzoxazole-2-thione (2-mercaptobenzoxazole), 3 H-benzothiazole-2-thione (2-mercaptobenzothiazole), thiazolidine-2-thione (2-mercapto-2-thiazoline), oxazolidine-2-thione (2-mercapto-2-oxazoline) and...
- A method of reducing the thermal stresses in the lining of the tuyere belt in a nonferrous metallurgy converter.
Slovikovskii, V. V. // Refractories & Industrial Ceramics; May2008, Vol. 49 Issue 3, p216
Research results are given on magnesian box-type components in the tuyere belt of horizontal converters at Ufalei Nickel Corporation. The purpose has been to eliminate the zoning in them by impregnation with nickel or copper mattes to relieve thermal stresses during use. Components impregnated...
- 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 12Cr�2Ni�Mo 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 12Cr�2Ni�Mo refractory steel. It is shown that, in the temperature range 20�450�C, the increase in the thickness of specimens leads to an insignificant increase in...
- Analysis of Typical Shock-Wave Experiments and Calculations of Thermodynamic Properties of Substances via Internet.
Levashov, P. R.; Khishchenko, K. V.; Lomonosov, I. V. // AIP Conference Proceedings; 2006, Vol. 849 Issue 1, p353
In this work we present the database on thermophysical properties of substances at high pressures and temperatures. The database contains experimental data, Hugoniot approximations and a number of caloric equations of state. A graphical Web-interface allows one to search data using different...
- 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...
- FIZ CHEMIE Berline Releases INFOTHERM.
Tarasova, E.; Poltim�e, T.; Krumme, A.; Lehtinen, A.; Viikna, A. // Information Today; Jan2004, Vol. 21 Issue 1, p44
The article reports on the online availability of INFOTHERM, database of thermophysical substance data of Germany's chemistry information center FIZ CHEMIE Berlin. Thermophysical properties of about 6,300 pure substances and 23,000 mixtures will be featured in the database. Basic data for pure...
- PRODUCTION AND CHARACTERIZATION OF GLASS-CERAMICS FROM WASTE MATERIALS.
Angjusheva, Biljana // Quality of Life: A Multi-Disciplinary Journal of Food Science, E; Jun2011, Vol. 2 Issue 1/2, p13
The fly ash, produced by power plant in Republic of Macedonia have been milled and sintered with addition of waste glass to obtain glass-ceramics. The physical, chemical and mechanical properties of fly ash and waste glass were determined. Through adequate sintering time and temperature, the...
- 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...
- Specific volumes of the Zr[sub 41.2]Ti[sub 13.8]Cu[sub 12.5]Ni[sub 10.0]Be[sub 22.5] alloy in....
Ohsaka, K.; Chung, S.K. // Applied Physics Letters; 2/10/1997, Vol. 70 Issue 6, p726
Examines the specific volume of metallic alloys in the liquid, gas, crystalline states. Details on the thermophysical properties and phase transition kinetics of metallic alloys; Identification of critical cooling rate for glass formation; Measurement of specific heat, hemispherical total...
- 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.
- 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 �C. The poly(MOPMA) was characterized by 1H and 13C-NMR, FT-IR, GPC, DSC and TGA techniques. The thermodynamic properties of...
- Microstructure and electrical properties in three-component (Al2O3--TiO2)/polyimide nanocomposite films.
Jun-Wei Zha; Ben-Hui Fan; Zhi-Min Dang; Sheng-Tao Li; Chen, George // Journal of Materials Research; Dec2010, Vol. 25 Issue 12, p2384
Polyimide (PI)-matrix composite films containing inorganic nanoparticles (nano-Al2O3 and nano-TiO2) have been fabricated. A proposed model is used to explain different structures of the (Al2O3--TiO2)/PI (ATP) films synthesized by employing in situ polymerization. Dependences of dielectric...
- Molecular Dynamics Study of Thermal Properties of Intermetallic Alloys.
Kart, H. H.; Tomak, M.; �agin, T. // Turkish Journal of Physics; 2006, Vol. 30 Issue 4, p311
Molecular dynamics simulations of bulk copper, gold pure metals and their ordered intermetallics alloys of Cu3Au(L12) and CuAu3(L12) have been carried out between above 0 K and below the their melting points of the materials for predicting their temperature-dependent thermophysical properties....
- 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...