Thermal conductivity of reference solid materials

M. J. Assael, K. Gialou, Konstantinos Kakosimos, I. Metaxa

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The thermal conductivity of three thermal-conductivity reference materials, Pyrex 7740, Pyroceram 9606, and stainless steel AISI 304L, has been studied. The technique employed is the transient hot-wire technique, and measurements cover a temperature range from room temperature up to 570 K. The technique is applied here in a novel way that eliminates all remaining contact resistances. This allows the apparatus to operate in an absolute way. The method makes use of a soft silicone paste material between the hot wires of the technique and the solid of interest. Measurements of the transient temperature rise of the wires in response to an electrical heating step in the wires over a period of 20 μs up to 20 s allow an absolute determination of the thermal conductivity of the solid, as well as of the silicone paste. The method is based on a full theoretical model with equations solved by a two-dimensional finite-element method applied to the exact geometry. At the 95% confidence level, the standard deviation of the thermal conductivity measurements is 0.1% for Pyrex 7740, 0.4% for Pyroceram 9606, and 0.2% for stainless steel AISI 304L, while the standard uncertainty of the technique is less than 1.5%.

Original languageEnglish
Pages (from-to)397-408
Number of pages12
JournalInternational Journal of Thermophysics
Volume25
Issue number2
DOIs
Publication statusPublished - Mar 2004
Externally publishedYes

Fingerprint

Pyroceram (trademark)
Thermal conductivity
thermal conductivity
wire
Wire
Stainless Steel
borosilicate glass
silicones
Silicones
Ointments
stainless steels
Stainless steel
Contact resistance
contact resistance
Temperature
confidence
standard deviation
finite element method
Finite element method
Heating

Keywords

  • AISI 304L
  • Pyrex 7740
  • Pyroceram 9606
  • Thermal conductivity
  • Transient hot wire

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes
  • Physics and Astronomy (miscellaneous)

Cite this

Thermal conductivity of reference solid materials. / Assael, M. J.; Gialou, K.; Kakosimos, Konstantinos; Metaxa, I.

In: International Journal of Thermophysics, Vol. 25, No. 2, 03.2004, p. 397-408.

Research output: Contribution to journalArticle

Assael, M. J. ; Gialou, K. ; Kakosimos, Konstantinos ; Metaxa, I. / Thermal conductivity of reference solid materials. In: International Journal of Thermophysics. 2004 ; Vol. 25, No. 2. pp. 397-408.
@article{06a298e86237441b8fb3a4b1ce34632c,
title = "Thermal conductivity of reference solid materials",
abstract = "The thermal conductivity of three thermal-conductivity reference materials, Pyrex 7740, Pyroceram 9606, and stainless steel AISI 304L, has been studied. The technique employed is the transient hot-wire technique, and measurements cover a temperature range from room temperature up to 570 K. The technique is applied here in a novel way that eliminates all remaining contact resistances. This allows the apparatus to operate in an absolute way. The method makes use of a soft silicone paste material between the hot wires of the technique and the solid of interest. Measurements of the transient temperature rise of the wires in response to an electrical heating step in the wires over a period of 20 μs up to 20 s allow an absolute determination of the thermal conductivity of the solid, as well as of the silicone paste. The method is based on a full theoretical model with equations solved by a two-dimensional finite-element method applied to the exact geometry. At the 95{\%} confidence level, the standard deviation of the thermal conductivity measurements is 0.1{\%} for Pyrex 7740, 0.4{\%} for Pyroceram 9606, and 0.2{\%} for stainless steel AISI 304L, while the standard uncertainty of the technique is less than 1.5{\%}.",
keywords = "AISI 304L, Pyrex 7740, Pyroceram 9606, Thermal conductivity, Transient hot wire",
author = "Assael, {M. J.} and K. Gialou and Konstantinos Kakosimos and I. Metaxa",
year = "2004",
month = "3",
doi = "10.1023/B:IJOT.0000028477.74595.d5",
language = "English",
volume = "25",
pages = "397--408",
journal = "International Journal of Thermophysics",
issn = "0195-928X",
publisher = "Springer New York",
number = "2",

}

TY - JOUR

T1 - Thermal conductivity of reference solid materials

AU - Assael, M. J.

AU - Gialou, K.

AU - Kakosimos, Konstantinos

AU - Metaxa, I.

PY - 2004/3

Y1 - 2004/3

N2 - The thermal conductivity of three thermal-conductivity reference materials, Pyrex 7740, Pyroceram 9606, and stainless steel AISI 304L, has been studied. The technique employed is the transient hot-wire technique, and measurements cover a temperature range from room temperature up to 570 K. The technique is applied here in a novel way that eliminates all remaining contact resistances. This allows the apparatus to operate in an absolute way. The method makes use of a soft silicone paste material between the hot wires of the technique and the solid of interest. Measurements of the transient temperature rise of the wires in response to an electrical heating step in the wires over a period of 20 μs up to 20 s allow an absolute determination of the thermal conductivity of the solid, as well as of the silicone paste. The method is based on a full theoretical model with equations solved by a two-dimensional finite-element method applied to the exact geometry. At the 95% confidence level, the standard deviation of the thermal conductivity measurements is 0.1% for Pyrex 7740, 0.4% for Pyroceram 9606, and 0.2% for stainless steel AISI 304L, while the standard uncertainty of the technique is less than 1.5%.

AB - The thermal conductivity of three thermal-conductivity reference materials, Pyrex 7740, Pyroceram 9606, and stainless steel AISI 304L, has been studied. The technique employed is the transient hot-wire technique, and measurements cover a temperature range from room temperature up to 570 K. The technique is applied here in a novel way that eliminates all remaining contact resistances. This allows the apparatus to operate in an absolute way. The method makes use of a soft silicone paste material between the hot wires of the technique and the solid of interest. Measurements of the transient temperature rise of the wires in response to an electrical heating step in the wires over a period of 20 μs up to 20 s allow an absolute determination of the thermal conductivity of the solid, as well as of the silicone paste. The method is based on a full theoretical model with equations solved by a two-dimensional finite-element method applied to the exact geometry. At the 95% confidence level, the standard deviation of the thermal conductivity measurements is 0.1% for Pyrex 7740, 0.4% for Pyroceram 9606, and 0.2% for stainless steel AISI 304L, while the standard uncertainty of the technique is less than 1.5%.

KW - AISI 304L

KW - Pyrex 7740

KW - Pyroceram 9606

KW - Thermal conductivity

KW - Transient hot wire

UR - http://www.scopus.com/inward/record.url?scp=3543104403&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3543104403&partnerID=8YFLogxK

U2 - 10.1023/B:IJOT.0000028477.74595.d5

DO - 10.1023/B:IJOT.0000028477.74595.d5

M3 - Article

VL - 25

SP - 397

EP - 408

JO - International Journal of Thermophysics

JF - International Journal of Thermophysics

SN - 0195-928X

IS - 2

ER -