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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 12 (1991), S. 593-601 
    ISSN: 1572-9567
    Keywords: anharmonic effects ; composites ; specific heat ; structural relaxation ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents a method for investigating structural relaxation by the measurements of specific heat, thermal diffusivity, and thermal conductivity. The relaxation effects are demonstrated on a composite based on carbon. A model for the investigated material is suggested. The material consists of regions which are in equilibrium state and regions which are in nonequilibrium state. The transition to the equilibrium state is manifested by reduction in the anharmonic effects and by chemical reactions. The contradictory behavior of the thermal diffusivity above room temperature is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 21 (2000), S. 571-583 
    ISSN: 1572-9567
    Keywords: CsPbCl3 single crystal ; heat of transition ; phase transition ; pulse transient method ; specific heat ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The main features of the pulse transient method are presented. The method gives the specific heat c and thermal diffusivity a for a single measurement, while thermal conductivity λ is calculated according to λ=caρ, where ρ is the density. The pulse transient method is a dynamic method based on the measurement of the temperature response to a heat pulse produced within a specimen. An apparatus operating in the temperature range from −40 to 100°C is described. Errors are discussed. The thermophysical properties of a CsPbCl3 single crystal are determined using the pulse transient method for a temperature range between 10 and 65°C in the controlled heating and cooling regimes. The data show anomalies in the thermophysical properties around the phase transition temperature at 47°C. Discrepancies in comparison with previously published data are discussed.
    Type of Medium: Electronic Resource
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