Thermal Diffusivity Measurement of High-Conductivity Materials by Dynamic Grating Radiometry

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A new apparatus based on dynamic grating radiometry (DGR) to measure the thermal diffusivity of high-conductivity materials such as graphite and diamond has been developed. In the DGR method, a sample surface is heated by interference of two pulsed laser beams, and the decay of temperature at a spot on the thermal grating is monitored by an infrared detector. In the ideal case where the grating period is much smaller than the light absorption length, the thermal diffusivity parallel to the surface can be determined from the decay constant and the grating period. This paper describes a procedure to extract the thermal diffusivity parallel to the plane while eliminating the effect of anisotropy and gives results for a preliminary measurement using Zr foil. A quadratic dependence of the time constant on fringe space has been observed in the fringe space change. Data are also presented for a 0.1-mm-thick graphite sheet. The results indicate the capability of DGR to measure anisotropic high-conductivity materials.

Original languageEnglish
Pages (from-to)289-299
Number of pages11
JournalInternational Journal of Thermophysics
Volume22
Issue number1
DOIs
Publication statusPublished - 2001

Fingerprint

Radiometry
Thermal diffusivity
thermal diffusivity
Graphite
gratings
conductivity
Diamond
Infrared detectors
Pulsed lasers
Light absorption
Metal foil
Laser beams
Diamonds
Anisotropy
graphite
infrared detectors
decay
electromagnetic absorption
time constant
foils

Keywords

  • Anisotropic graphite sheet
  • Dynamic grating radiometry
  • High-conductivity materials
  • Thermal diffusivity

ASJC Scopus subject areas

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

Cite this

@article{8fbc160c99504fa7be8da47ea4783a1f,
title = "Thermal Diffusivity Measurement of High-Conductivity Materials by Dynamic Grating Radiometry",
abstract = "A new apparatus based on dynamic grating radiometry (DGR) to measure the thermal diffusivity of high-conductivity materials such as graphite and diamond has been developed. In the DGR method, a sample surface is heated by interference of two pulsed laser beams, and the decay of temperature at a spot on the thermal grating is monitored by an infrared detector. In the ideal case where the grating period is much smaller than the light absorption length, the thermal diffusivity parallel to the surface can be determined from the decay constant and the grating period. This paper describes a procedure to extract the thermal diffusivity parallel to the plane while eliminating the effect of anisotropy and gives results for a preliminary measurement using Zr foil. A quadratic dependence of the time constant on fringe space has been observed in the fringe space change. Data are also presented for a 0.1-mm-thick graphite sheet. The results indicate the capability of DGR to measure anisotropic high-conductivity materials.",
keywords = "Anisotropic graphite sheet, Dynamic grating radiometry, High-conductivity materials, Thermal diffusivity",
author = "Yoshihiro Taguchi and Yuji Nagasaka",
year = "2001",
doi = "10.1023/A:1006797117116",
language = "English",
volume = "22",
pages = "289--299",
journal = "International Journal of Thermophysics",
issn = "0195-928X",
publisher = "Springer New York",
number = "1",

}

TY - JOUR

T1 - Thermal Diffusivity Measurement of High-Conductivity Materials by Dynamic Grating Radiometry

AU - Taguchi, Yoshihiro

AU - Nagasaka, Yuji

PY - 2001

Y1 - 2001

N2 - A new apparatus based on dynamic grating radiometry (DGR) to measure the thermal diffusivity of high-conductivity materials such as graphite and diamond has been developed. In the DGR method, a sample surface is heated by interference of two pulsed laser beams, and the decay of temperature at a spot on the thermal grating is monitored by an infrared detector. In the ideal case where the grating period is much smaller than the light absorption length, the thermal diffusivity parallel to the surface can be determined from the decay constant and the grating period. This paper describes a procedure to extract the thermal diffusivity parallel to the plane while eliminating the effect of anisotropy and gives results for a preliminary measurement using Zr foil. A quadratic dependence of the time constant on fringe space has been observed in the fringe space change. Data are also presented for a 0.1-mm-thick graphite sheet. The results indicate the capability of DGR to measure anisotropic high-conductivity materials.

AB - A new apparatus based on dynamic grating radiometry (DGR) to measure the thermal diffusivity of high-conductivity materials such as graphite and diamond has been developed. In the DGR method, a sample surface is heated by interference of two pulsed laser beams, and the decay of temperature at a spot on the thermal grating is monitored by an infrared detector. In the ideal case where the grating period is much smaller than the light absorption length, the thermal diffusivity parallel to the surface can be determined from the decay constant and the grating period. This paper describes a procedure to extract the thermal diffusivity parallel to the plane while eliminating the effect of anisotropy and gives results for a preliminary measurement using Zr foil. A quadratic dependence of the time constant on fringe space has been observed in the fringe space change. Data are also presented for a 0.1-mm-thick graphite sheet. The results indicate the capability of DGR to measure anisotropic high-conductivity materials.

KW - Anisotropic graphite sheet

KW - Dynamic grating radiometry

KW - High-conductivity materials

KW - Thermal diffusivity

UR - http://www.scopus.com/inward/record.url?scp=0042281522&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042281522&partnerID=8YFLogxK

U2 - 10.1023/A:1006797117116

DO - 10.1023/A:1006797117116

M3 - Article

AN - SCOPUS:0042281522

VL - 22

SP - 289

EP - 299

JO - International Journal of Thermophysics

JF - International Journal of Thermophysics

SN - 0195-928X

IS - 1

ER -