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Abstract <p>The paper presents measurements of the thermal conductivity and thermal diffusivity coefficients of graphene oxide (GO) thin films in three mutually perpendicular directions in the temperature ranges from 203 to 373 K. The process and features of measuring GO thin films at temperatures near GO reduction temperatures (approximately 393 K) are described in detail. Using the laser flash method (LFA), the method of differential scanning calorimetry (DSC), and hydrostatic weighing, experimental dependences of specific heat capacity, density, thermal conductivity, and thermal diffusivity coefficients on the temperature of thin GO films were obtained. As a result of the work, the specific heat capacity, thermal diffusivity, and thermal conductivity of thin GO films were measured as functions of temperature, and it was also found that the use of the flash method for measuring thermal diffusivity in the temperature range from 273 to 373 K makes it possible to consider anisotropic materials as orthotropic.</p>

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Physical Measurements of Orthotropy of Graphene Oxide Thin Films

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • D. A. Prokhorov,
  • S. M. Zuev

摘要

Abstract

The paper presents measurements of the thermal conductivity and thermal diffusivity coefficients of graphene oxide (GO) thin films in three mutually perpendicular directions in the temperature ranges from 203 to 373 K. The process and features of measuring GO thin films at temperatures near GO reduction temperatures (approximately 393 K) are described in detail. Using the laser flash method (LFA), the method of differential scanning calorimetry (DSC), and hydrostatic weighing, experimental dependences of specific heat capacity, density, thermal conductivity, and thermal diffusivity coefficients on the temperature of thin GO films were obtained. As a result of the work, the specific heat capacity, thermal diffusivity, and thermal conductivity of thin GO films were measured as functions of temperature, and it was also found that the use of the flash method for measuring thermal diffusivity in the temperature range from 273 to 373 K makes it possible to consider anisotropic materials as orthotropic.