Thermal Conductivity of Alumina Measured with Three Techniques

    Volume 31, Issue 5 (September 2003)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 5


    Hemrick, JG
    Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

    Kistler, CW
    Orton Ceramic Foundation, Westerville, OH

    Wereszczak, AA
    Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

    Ferber, MK
    Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

    (Received 19 August 2002; accepted 23 April 2003)

    Abstract

    Three common ASTM methods (calorimetry, hot-wire, and laser-flash) for determining the thermal conductivity of refractory ceramics were compared using a commonly available bulk material having a microstructure sufficient for all three methods of analysis. Experimental measurements were made between 20–1200°C on a fine-grained, 94 % pure aluminum oxide using each technique. Results from the hot-wire and laser-flash methods were found to be similar and in line with theoretical and literature values. Values obtained by the calorimetry method were found to be lower than those of the other two methods, with a greater deviation at lower temperatures than at higher temperatures.


    Paper ID: JTE12368J

    DOI: 10.1520/JTE12368J

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    Author
    Title Thermal Conductivity of Alumina Measured with Three Techniques
    Symposium , 0000-00-00
    Committee D09