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Method of Measurement of Thermal Diffusivity to 1000°C
Author(s) -
PLUMMER W. A.,
CAMPBELL D. E.,
COMSTOCK A. A.
Publication year - 1962
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.1151-2916.1962.tb11157.x
Subject(s) - thermal diffusivity , materials science , ceramic , thermodynamics , thermal , steady state (chemistry) , laser flash analysis , composite material , mechanics , chemistry , physics
A non‐steady‐state method of measuring thermal diffusivity is described. The method has been used for measurements on glasses, ceramics, and refractories up to 1000°C with satisfactory results. The choice of a non‐steady‐state method permits simplification of the equipment and the specimen preparation required. In addition, only temperature differences, times, and specimen thickness need to be known. The temperature rise of a flat heating element and that of a heat sink in the medium are measured. For a given thickness and time, the diffusivity is a function of the ratio of the foregoing two temperatures. The applications and limitations of the method are discussed.