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A Measurement Approach for Characterizing Temperature-Related Emissivity Variability in High-Emissivity Materials.

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Summary
This summary is machine-generated.

Accurate temperature measurement requires knowing material emissivity, especially in high-temperature applications. This study introduces a novel microwave heating method to determine total emissivity for high-emissivity materials.

Keywords:
emissivityhigh-emissivity materialsmaterial characterizationmicrowaveuncertainty analysis

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Area of Science:

  • Materials Science
  • Thermodynamics
  • Metrology

Background:

  • Accurate non-contact temperature measurements using pyrometry and thermal imaging depend on precise knowledge of material emissivity.
  • Material emissivity is temperature-dependent, a critical factor in high-temperature applications.
  • Renewed interest in high-temperature applications, driven by the need for greener energy solutions in industrial processes, necessitates better characterization of radiant properties.

Purpose of the Study:

  • To develop and validate a measurement procedure for characterizing the total emissivity of high-emissivity materials.
  • To utilize microwave heating as a method for sample preparation in emissivity measurements.
  • To provide a metrologically characterized approach with uncertainty analysis.

Main Methods:

  • A sequential measurement approach is employed, utilizing a reference material with known emissivity.
  • Microwave heating is used to bring the test material to desired high-temperature conditions.
  • Uncertainty analysis is performed to ensure the reliability and metrological traceability of the emissivity measurements.

Main Results:

  • The proposed procedure was validated on target materials with known emissivity, including those used in microwave heating.
  • Results obtained using the novel method show compatibility with existing literature values and material datasheets.
  • The study successfully demonstrated the validity and applicability of the microwave-assisted emissivity characterization technique.

Conclusions:

  • The developed microwave-assisted procedure offers a reliable method for determining the total emissivity of high-emissivity materials.
  • This technique is particularly relevant for materials used in high-temperature industrial processes, including those employing microwave heating.
  • The metrological characterization and validation confirm the accuracy and practical utility of the proposed emissivity measurement approach.