The specific heat and thermal conductivity of Eccosorb CR-124 between 800 mK and 6 K

Patrick Wikus*, Kevin A. McCarthy, Scott A. Hertel, Yelena S. Bagdasarova, Enectalí Figueroa-Feliciano, Steven W. Leman, John M. Rutherford, Sarah N. Trowbridge, Scott W. Vasquez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Eccosorb CR-124 is a castable iron-loaded epoxy resin with excellent absorption properties for electromagnetic waves in the GHz range. It is commonly used in low temperature instruments to absorb thermal radiation. The specific heat c (T) of Eccosorb CR-124 was measured between 800 mK and 6 K with the heat pulse method. The results were fitted to the function c (T) = (0.132 ± 0.003) · T + (0.0053 ± 0.0003) · T3 J kg- 1 K- 1, with T being the temperature in Kelvin. In addition, the thermal diffusivity D (T) of Eccosorb CR-124 was determined. At a temperature of 2.3 K, a peak is observed in D (T). Consequently, the thermal conductivity λ (T) of Eccosorb CR-124 features two distinct regimes. Below 2.3 K, it fits the function λ (T < 2.3 K) = (0.0038 ± 0.0003) · T2 ± 0.1 W m- 1 K- 1. Above 2.3 K, it fits the function λ (T > 2.3 K) = (0.0057 ± 0.0004) · T1.4 ± 0.04 W m- 1 K- 1.

Original languageEnglish (US)
Pages (from-to)421-424
Number of pages4
JournalCryogenics
Volume49
Issue number8
DOIs
StatePublished - Aug 2009

Keywords

  • A. Epoxy
  • C. Heat capacity
  • C. Thermal conductivity
  • F. RF applications

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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