Journal Published Online: 01 September 2003
Volume 31, Issue 5

Thermal Conductivity of Alumina Measured with Three Techniques

CODEN: JTEVAB

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.

Author Information

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
Pages: 5
Price: $25.00
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Details
Stock #: JTE12368J
ISSN: 0090-3973
DOI: 10.1520/JTE12368J