Chapter 12. Operational Features and Results of a Computerized, Radial Heat Flow Instrument for Determining Thermal Diffusivity and Conductivity

  1. William J. Smothers
  1. G. S. Sheffield and
  2. M. Vukovich Jr

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320372.ch12

Application of Refractories: Ceramic Engineering and Science Proceedings, Volume 8, Issue 1/2

Application of Refractories: Ceramic Engineering and Science Proceedings, Volume 8, Issue 1/2

How to Cite

Sheffield, G. S. and Vukovich, M. (1987) Operational Features and Results of a Computerized, Radial Heat Flow Instrument for Determining Thermal Diffusivity and Conductivity, in Application of Refractories: Ceramic Engineering and Science Proceedings, Volume 8, Issue 1/2 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320372.ch12

Author Information

  1. The Edward Orton Jr. Ceramic Foundation 6991 Old 3C Hwy., Westerville, OH 43081

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780470374702

Online ISBN: 9780470320372

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Keywords:

  • operational features;
  • thermal diffusivity;
  • ceramic materials;
  • polycrytallfne alumina;
  • thermal conductuctivities

Summary

A radial heat flow instrument has been developed and computerized for essentially automatic determination of thermal diffusivity of ceramic materials from 200°–1140°C in a single scan from which thermal conductivity values were calculated. The basic operation of the instrument and its unique features are discussed with respect to procedural simplicity, rapidity, and ease by which tabular and graphical results are obtained. The Instrument has been tested with high density, high purity polycrystallne alumina and the results obtained were in statistical agreement with literature values to within a few percent. A repeatability of about ±1.5% has been obtained with both alumina and insulating firebrick. The system is applicable to materials with thermal conductivities of 0.05 cal-sec−1cm−10C−1 (21 W m-10K-t) or less.