Abstract
In this paper, we discuss the unique challenges posed by Silicaf/Silica composite while measuring their thermal conductivity by using Transient Plane Source (TPS) method and specific heat by Differential Scanning Calorimeter (DSC). The measured thermal conductivity values were found reaching a plateau followed by a reduction at temperatures 800 °C and above. Thermal expansion characteristics as measured in Thermomechanical Analyzer (TMA) exhibited strong dependency on static force applied during experiments. Keeping in view the real life application of the developed Silicaf/Silica composite, a novel method of sample preparation was implemented which restricted the sample compression at elevated temperatures during TPS experiments. Experiments utilizing DSC under linear and step heating with sample placement in alumina crucible yielded inconsistent values of specific heat (Cp). With further experimentation, the combination of step heating and direct placement of sample in platinum crucible was found most appropriate for accurate measurement of specific heat of Silicaf/Silica.
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