SYMPOSIA PAPER Published: 01 January 2002

Thermal Physical and Optical Properties of Fiber Insulation Materials in the Temperature Range 200 – 1800 °C


Thermal physical (thermal diffusivity and conductivity) and optical (attenuation, absorption and scattering) properties of alumina fiber insulation materials were measured. The measurements of apparent thermophysical properties are based on the method of heating of plate specimens at a constant rate. The determination of the conductive and the radiative components of apparent properties is based on the combined radiative-conductive heat transfer theory (RCHT) and the measurement of optical properties.

The significant influence of the heat radiation component on the apparent thermal physical properties is demonstrated. Other heat transfer mechanisms that affect the apparent thermal conductivity are also analyzed. Limitations of standard methods for measurement of apparent thermal physical properties of semitransparent fiber materials, including anisotropic materials, are discussed.

Author Information

Litovsky, E
Integrity Testing Laboratory Inc., Markham, ON, Canada
Kleiman, JI
Integrity Testing Laboratory Inc., Markham, ON, Canada
Menn, N
LUMINOS Computerized Systems Ltd., Tirat Carmel, Israel
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Developed by Committee: C16
Pages: 257–269
DOI: 10.1520/STP11017S
ISBN-EB: 978-0-8031-5469-8
ISBN-13: 978-0-8031-2898-9