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Simple and Inexpensive Flash Technique for Determining Thermal Diffusivity of Ceramics
Author(s) -
Log Torgrim,
Jackson T. Barrett
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb04325.x
Subject(s) - laser flash analysis , thermal diffusivity , flash (photography) , thermocouple , materials science , ceramic , flash lamp , thermal conductivity measurement , thermal , atmospheric temperature range , laser , nuclear engineering , composite material , mineralogy , thermodynamics , optics , optoelectronics , thermal conductivity , chemistry , physics , engineering
A simple technique for determining the thermal diffusivity of ceramics at room temperature is presented. The technique is a variant of the well‐known flash technique, but uses an inexpensive photo flash as the energy source, a fast‐response paste‐on thermocouple, and a precision digital voltmeter to measure the temperature rise. A data analysis technique, which does not need any knowledge of either the initial or the maximum sample temperature, is presented. Good agreement with the laser‐flash technique for ceramics with thermal diffusivities in the range 0.5 × 10 −6 to 75 × 10 −6 m 2 · s −1 is obtained. Measurements of thermal diffusivity of stainless steel and graphite (standard reference materials) indicate that the method is accurate to within 3%.