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  • Articles  (230)
  • thermal conductivity  (230)
  • Springer  (230)
  • Blackwell Publishing Ltd
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  • International Union of Crystallography
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  • 1995-1999  (94)
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  • Physics  (219)
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  • Articles  (230)
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  • Springer  (230)
  • Blackwell Publishing Ltd
  • Elsevier
  • International Union of Crystallography
  • Taylor & Francis
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  • 1
    Electronic Resource
    Electronic Resource
    Thermal conductivity ofn-Tetracosan around the liquid-liquid transition temperatureT u (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 603-606 
    Details
    ISSN: 1435-1536
    Keywords: n-Tetracosan ; thermal conductivity ; transient hot strip ; liquid-liquid transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Forn-Tetracosan the temperature dependence of the thermal conductivity has been determined between 52 °C and 150 °C by the transient hot strip method. A decreasing thermal conductivity is followed by a constant one forT≳100 °C. The change in slope can be well estimated by using data of Brillouin scattering and specific volume measurements thus confirming the existence of theT u -phenomenon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421896
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  • 2
    Electronic Resource
    Electronic Resource
    Temperature and Pressure Dependencies of Thermal Transport Properties of Rocks: Implications for Uncertainties in Thermal Lithosphere Models and new Laboratory Measurements of High-Grade Rocks in the Central Fennoscandian Shield (1999)
    Springer
    Surveys in geophysics 20 (1999), S. 33-59 
    Details
    ISSN: 1573-0956
    Keywords: (AGI) ; heat flow ; lithosphere ; thermal conductivity ; thermal diffusivity ; models ; uncertainty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Measurements on thermal conductivity and diffusivity as functions of temperature (up to 1150 K) and pressure (up to 1000 MPa) are presented for Archaean and Proterozoic mafic high-grade rocks metamorphosed in middle and lower crustal pressures, and situated in eastern Finland, central Fennoscandian Shield. Decrease of 12–20% in conductivity and 40–55% in diffusivity was recorded between room temperature and 1150 K, which can be considered as typical of phonon conductivity. Radiative heat transfer effects were not detected in these samples. Pressure dependencies of the samples are weak if compared to crystalline rocks in general, but relatively typical for mafic rocks. The temperature and pressure dependencies of thermal transport properties (data from literature and the present study) were applied in an uncertainty analysis of lithospheric conductive thermal modellings with random (Monte Carlo) simulations using a 4-layer model representative of shield lithosphere. Model parameters were varied according to predetermined probability functions and standard deviations were calculated for lithospheric temperature and heat flow density after 1500 independent simulations. The results suggest that the variations (uncertainties) in calculated temperature and heat flow density values due to variations in the temperature and pressure dependencies of conductivity are minor in comparison to the effects produced by typical variations in the room temperature value of conductivity, heat production rate or lower boundary condition values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006655023894
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  • 3
    Electronic Resource
    Electronic Resource
    Two-dimensional gas of disks: Thermal conductivity (1996)
    Springer
    Journal of statistical physics 82 (1996), S. 1453-1466 
    Details
    ISSN: 1572-9613
    Keywords: Kinetic theory ; thermal conductivity ; molecular dynamics ; hard disks ; Enskog's Theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The phenomenon of heat conduction in a two-dimensional gas ofN hard disks is studied in the hydrostatic regime by means of nonequilibrium molecular dynamics (N ranging from 100 to 8000). For systems withN≥1500 the temperature and density profiles observed are in excellent agreement with the continuous theory, but the conductivityk differs from the one derived from Enskog's theory in a systematic way. This difference seems to slowly decrease with increasing density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02183391
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrodynamic correlation functions of hard-sphere fluids at short times (1989)
    Springer
    Journal of statistical physics 57 (1989), S. 595-629 
    Details
    ISSN: 1572-9613
    Keywords: Neutron scattering function ; shear viscosity ; bulk viscosity ; thermal conductivity ; Green-Kubo integrand ; hard-sphere fluid ; short-time expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The short-time behavior of the coherent intermediate scattering function for a fluid of hard-sphere particles is calculated exactly through ordert 4, and the other hydrodynamic correlation functions are calculated exactly through ordert 2. It is shown that for all of the correlation functions considered the Enskog theory gives a fair approximation. Also, the initial time behavior of various Green-Kubo integrands is studied. For the shear-viscosity integrand it is found that at densitynσ3=0.837 the prediction of the Enskog theory is 32% too low. The initial value of the bulk viscosity integrand is nonzero, in contrast to the Enskog result. The initial value of the thermal conductivity integrand at high densities is predicted well by Enskog theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01022824
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  • 5
    Electronic Resource
    Electronic Resource
    Time-domain and frequency-domain differential calorimetry (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 75-85 
    Details
    ISSN: 1572-8943
    Keywords: calorimetry ; enthalpy ; heat capacity ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The heat capacityC p of a sample can be considered as a frequency dependent quantity; its behaviour can reflect the dynamics of enthalpy fluctuations. In order to take into account the dynamic nature of the measured quantity, calorimetry can mimic experimental methods as those of dielectrometry, performing experiments in time domain or in frequency domain. In this paper, an instrument is presented which is based on a calorimetric method meeting these requirements, and thus allowing to study sample dynamics of very viscous systems as glasses and some supercooled liquids. Moreover, experimental procedures permitting investigation of samples undergoing chemical and/or physical transformations by simultaneous measurements of enthalpy variation, heat capacity and, under certain conditions, thermal conductivity, are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01982687
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  • 6
    Electronic Resource
    Electronic Resource
    Derivation of Temperature-Modulated DSC Thermal Conductivity Equations (1998)
    Springer
    Journal of thermal analysis and calorimetry 54 (1998), S. 467-476 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; TMDSC ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract One of the benefits of temperature-modulated DSC (TMDSC) is its ability to measure thermal conductivity and thermal diffusivity without DSC cell modifications or additional accessories. Thermal conductivity of solid materials from 0.1 to about 1 W m-1 K-1 measured. Applications of this approach have been discussed in the literature but no description is yet available concerning the derivation of the working equations. This presentation provides a detailed derivation of the working equations used to obtain thermal conductivity and thermal diffusivity from TMDSC data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010178022559
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  • 7
    Electronic Resource
    Electronic Resource
    Optimization of the Thermal Radiation Extinction of Silicon Carbide in a Silica Powder Matrix (1999)
    Springer
    Journal of thermal analysis and calorimetry 56 (1999), S. 77-85 
    Details
    ISSN: 1572-8943
    Keywords: silicon carbide ; specific extinction ; thermal conductivity ; thermal radiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In order to optimize the infrared extinction of a SiC-powder in a silica powder matrix, Mie scattering calculations for spherical SiC-particles have been performed. A single oscillator-model was applied to calculate the optical constants of SiC. Taking into account the particle size distribution of a commercially available SiC-powder, its wavelength dependent extinction coefficient was calculated. The result is in very good agreement with the extinction spectrum of the powder derived by infrared optically measurements. Mie scattering theory also was used to find the optimum mean SiC-particle diameter of a mixture of 20% SiC-powder and 80% silica powder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010131324100
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal Conductivities of Molecular Materials (1999)
    Springer
    Journal of thermal analysis and calorimetry 57 (1999), S. 765-771 
    Details
    ISSN: 1572-8943
    Keywords: molecular solids ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Heat conduction is one of the most fundamental properties of a material. Knowledge of its magnitude and temperature dependence can be important in determining use limitations of a material. Experimental studies of heat conduction in molecular systems are summarized, with emphasis on N2 and CBr4, and placed in the context of our understanding of heat conduction mechanisms in solids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010177721664
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  • 9
    Electronic Resource
    Electronic Resource
    Thermal properties of polycarbonate grade bisphenol A (1996)
    Springer
    Journal of thermal analysis and calorimetry 46 (1996), S. 1151-1166 
    Details
    ISSN: 1572-8943
    Keywords: bisphenol A ; crystallization ; glass transition ; melting ; polymorphism ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Thermal properties of 4,4′(2,2′-propylidene)-diphenol, referred to as bisphenol A, or BPA, are discussed. Parameters of thermal transitions were measured by DSC. The commercial product crystallizes in α-form crystals which melt at 157°C (onset) and 161°C (peak) with a heat of fusion 134.37 J g−1. Supercooled BPA shows a glass transition at about 40°C. Almost identical results were obtained for samples recovered by different methods: flakes, pastilles and prills. Two new polymorphs, the β and γ-forms were identified. The β-form melts at 131°C with a heat of fusion of 104.9 J g−1. The melting point of the γ-form was measured to be 138°C and its heat of fusion is 118.3 J g−1. Thermal conductivity of crystalline BPA was measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01983626
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of the Concentrations of Binary Mixtures of Glycerine and Water by a Transient Method (1998)
    Springer
    Journal of thermal analysis and calorimetry 53 (1998), S. 855-859 
    Details
    ISSN: 1572-8943
    Keywords: binary mixture ; concentration ; glycerine-water ; on-line analysis ; thermal analysis ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conductivities of binary mixtures of glycerine and water were measured at 20°C by means of a transient method. The equation describing the correlation between concentration and thermal conductivity was determined. The equation can be used for determining concentrations in mixtures. The results show that (1) the error in the determination of the molar concentration of water in mixtures is less than 1%, (2) the time of measurement is 1 s, (3) this method can be used for on-line analysis in production control.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010138317975
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