Premium
Simultaneous Determination of Thermal Conductivity and Specific Heat for Refractory Materials
Author(s) -
Ho Kai,
Pehlke Robert D.
Publication year - 1990
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.1151-2916.1990.tb07594.x
Subject(s) - thermal conductivity , heat flux , materials science , work (physics) , thermal , molding (decorative) , transient (computer programming) , refractory (planetary science) , thermodynamics , composite material , thermal conductivity measurement , mechanics , heat transfer , computer science , physics , operating system
The present work describes a transient method for determining thermal properties of refractory materials. Specific to this technique are (1) the experimental measurement of heat flux on the heated surface and (2) a method of data analysis based on the numerical techniques of nonlinear least squares and finite difference. Several mathematical formulations are proposed to minimize computing time requirements. Silica molding sand is used in two examples to illustrate the applicability of the technique to refractory materials. Owing to the measurement of heat flux on the heated surface, both thermal conductivity k and volumetric specific heat C can be determined if their temperature dependencies are not considered. In the case when temperature‐dependent thermal properties are considered, it is found that the inherent accuracy of the experiment does not allow the determination of both temperature‐variable k and C at the same time. It is shown that the present method has advantages in the ease and directness of the required experiment and in greater computational efficiency. Thermal properties are reported for a bonded silica and an unbonded silica sand.