Low-temperature thermal conductivity of an opal + epoxy-resin nanocomposite |
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| Authors: | V N Bogomolov D A Kurdyukov L S Parfen’eva I A Smirnov H Misiorek A Jezowski |
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| Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) Institute of Low-Temperature and Structural Research, Polish Academy of Sciences, Wrocław, 50-950, Poland |
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| Abstract: | The thermal conductivity of an opal + epoxy-resin nanocomposite under 100% filling of first-order opal voids by epoxy resin was measured in the range 5–100 K. For T < T0 (T0 is the temperature at which the thermal conductivity of epoxy resin becomes equal to that of amorphous SiO2 opal spheres, with inclusion of their porosity associated with second-and third-order voids), the thermal conductivity of the opal + epoxy-resin nanocomposite undergoes a sharp decrease, which is qualitatively accounted for by the appearance of Kapitsa heat resistance at the contacts between the amorphous opal spheres and epoxy resin. |
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