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Title: Measurement of thermal conductivity of polycrystalline CVD diamond by laser-induced transient grating technique

Abstract

The tangential thermal diffusivity D{sub ||} and thermal conductivity k{sub ||} of diamond plates grown from the gaseous phase by chemical vapour deposition (CVD diamond) are determined by the transient grating technique in the temperature range 25 - 200 {sup 0}C. Samples of insulating and boron-doped polycrystalline diamond of thickness about 0.3 mm and diameter 63 mm were synthesised in a microwave discharge in mixtures of methane and hydrogen. In view of the intense light scattering by the samples, a photosensitive grating recording technique was developed and used for measurements. It was found that the value k{sub ||} amounts to 18 - 20 W cm{sup -1} K{sup -1} at room temperature, approaching the thermal conductivity of the highest purity single crystals of diamond. A comparison of the value of k{sub ||} with the normal thermal conductivity k{sub perpendicular} determined by the flash method reveals a thermal conductivity anisotropy of about 10% - 20% associated with the texture of the diamond film, the normal component of thermal conductivity being larger than the tangential component. Boron-doped diamond displays a dependence of the transient grating kinetics on the excitation wavelength. The obtained results indicate that CVD diamond is a promising material for preparingmore » efficient heat sinks, especially of large size, used in microelectronic devices and laser engineering. (laser applications and other topics in quantum electronics)« less

Authors:
;  [1]; ;  [2];  [3]
  1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk (Belarus)
  2. Natural Science Center, A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
  3. Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
21454780
Resource Type:
Journal Article
Journal Name:
Quantum Electronics (Woodbury, N.Y.)
Additional Journal Information:
Journal Volume: 32; Journal Issue: 4; Other Information: DOI: 10.1070/QE2002v032n04ABEH002200; Journal ID: ISSN 1063-7818
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; BORON; CHEMICAL VAPOR DEPOSITION; CRYSTAL GROWTH; DIAMONDS; DOPED MATERIALS; EXCITATION; GRATINGS; HEAT SINKS; HIGH-FREQUENCY DISCHARGES; HYDROGEN; LASERS; LIGHT SCATTERING; METHANE; MONOCRYSTALS; PLATES; POLYCRYSTALS; TEMPERATURE RANGE 0273-0400 K; THERMAL CONDUCTIVITY; THERMAL DIFFUSIVITY; THIN FILMS; WAVELENGTHS; ALKANES; CARBON; CHEMICAL COATING; CRYSTALS; DEPOSITION; ELECTRIC DISCHARGES; ELEMENTS; ENERGY-LEVEL TRANSITIONS; FILMS; HYDROCARBONS; MATERIALS; MINERALS; NONMETALS; ORGANIC COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SEMIMETALS; SINKS; SURFACE COATING; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES

Citation Formats

Ivakin, E V, Sukhodolov, A V, Ralchenko, V G, Vlasov, A V, and Khomich, A V. Measurement of thermal conductivity of polycrystalline CVD diamond by laser-induced transient grating technique. United States: N. p., 2002. Web. doi:10.1070/QE2002V032N04ABEH002200.
Ivakin, E V, Sukhodolov, A V, Ralchenko, V G, Vlasov, A V, & Khomich, A V. Measurement of thermal conductivity of polycrystalline CVD diamond by laser-induced transient grating technique. United States. doi:10.1070/QE2002V032N04ABEH002200.
Ivakin, E V, Sukhodolov, A V, Ralchenko, V G, Vlasov, A V, and Khomich, A V. Tue . "Measurement of thermal conductivity of polycrystalline CVD diamond by laser-induced transient grating technique". United States. doi:10.1070/QE2002V032N04ABEH002200.
@article{osti_21454780,
title = {Measurement of thermal conductivity of polycrystalline CVD diamond by laser-induced transient grating technique},
author = {Ivakin, E V and Sukhodolov, A V and Ralchenko, V G and Vlasov, A V and Khomich, A V},
abstractNote = {The tangential thermal diffusivity D{sub ||} and thermal conductivity k{sub ||} of diamond plates grown from the gaseous phase by chemical vapour deposition (CVD diamond) are determined by the transient grating technique in the temperature range 25 - 200 {sup 0}C. Samples of insulating and boron-doped polycrystalline diamond of thickness about 0.3 mm and diameter 63 mm were synthesised in a microwave discharge in mixtures of methane and hydrogen. In view of the intense light scattering by the samples, a photosensitive grating recording technique was developed and used for measurements. It was found that the value k{sub ||} amounts to 18 - 20 W cm{sup -1} K{sup -1} at room temperature, approaching the thermal conductivity of the highest purity single crystals of diamond. A comparison of the value of k{sub ||} with the normal thermal conductivity k{sub perpendicular} determined by the flash method reveals a thermal conductivity anisotropy of about 10% - 20% associated with the texture of the diamond film, the normal component of thermal conductivity being larger than the tangential component. Boron-doped diamond displays a dependence of the transient grating kinetics on the excitation wavelength. The obtained results indicate that CVD diamond is a promising material for preparing efficient heat sinks, especially of large size, used in microelectronic devices and laser engineering. (laser applications and other topics in quantum electronics)},
doi = {10.1070/QE2002V032N04ABEH002200},
journal = {Quantum Electronics (Woodbury, N.Y.)},
issn = {1063-7818},
number = 4,
volume = 32,
place = {United States},
year = {2002},
month = {4}
}