A Thermal Comparator Apparatus for Thermal Conductivity Measurements from 50 to 400 [degrees] C

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Description

The experimental details, mathematical models, and typical data for a rapid comparative method for thermal conductivity measurements are presented. The method consists of measuring the temperature change of a small silver sphere after it is brought in contact with a small disk-shaped specimen which was initially at ta higher temperature. This temperature change was calibrated in the range of 50 to 400 degrees C by making measurements on samples of know thermal conductivity. The accuracy of this technique was shown to be between than +-10% with a reproducibility of at least +-2.5%. Using known transport mechanisms for heat conduction in … continued below

Physical Description

47 pages : illustrations

Creation Information

Kollie, T. G.; McElroy, D. L.; Graves, R. S. & Fulkerson, W. August 11, 1964.

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Titles

  • Main Title: A Thermal Comparator Apparatus for Thermal Conductivity Measurements from 50 to 400 [degrees] C
  • Series Title: ORNL (Series)
  • Series Title: Oak Ridge National Laboratory Reports
  • Added Title: Oak Ridge National Laboratory Report ORNL-P-148

Description

The experimental details, mathematical models, and typical data for a rapid comparative method for thermal conductivity measurements are presented. The method consists of measuring the temperature change of a small silver sphere after it is brought in contact with a small disk-shaped specimen which was initially at ta higher temperature. This temperature change was calibrated in the range of 50 to 400 degrees C by making measurements on samples of know thermal conductivity. The accuracy of this technique was shown to be between than +-10% with a reproducibility of at least +-2.5%. Using known transport mechanisms for heat conduction in solids and the temperature dependency of the electrical conductivity, a means to judiciously extrapolate thermal conductivity data obtained between 50 and 400 degree C to high temperature is presented.

Physical Description

47 pages : illustrations

Notes

Digitized from microopaque cards (2).

Paper to be presented at the National Physical Laboratory Thermal Conductivity Conference, Teddington, England, July 15-17, 1964.

Includes bibliographic references (page 47).

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  • SuDoc Number: Y 3.At 7:22/ORNL-P-148
  • Report No.: ORNL-P-148
  • Accession or Local Control No: metadc1257320
  • Archival Resource Key: ark:/67531/metadc1257320

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TRAIL Microcard Collection

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Creation Date

  • August 11, 1964

Added to The UNT Digital Library

  • June 18, 2021, 7:17 a.m.

Description Last Updated

  • April 4, 2023, 10:47 a.m.

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Kollie, T. G.; McElroy, D. L.; Graves, R. S. & Fulkerson, W. A Thermal Comparator Apparatus for Thermal Conductivity Measurements from 50 to 400 [degrees] C, report, August 11, 1964; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1257320/: accessed June 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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