Study of thermal parameters' temperature dependence in solids using photothermal radiometry

Area of Science:

• Materials Science
• Thermal Physics
• Analytical Chemistry

Background:

• Accurate measurement of thermal properties is crucial for material characterization.
• Understanding temperature dependence of thermal parameters is essential for predicting material behavior under varying conditions.
• Photothermal radiometry (PTR) is a versatile, non-contact technique for thermal analysis.

Purpose of the Study:

• To develop and validate a photothermal radiometry (PTR) configuration for measuring temperature-dependent thermal parameters in solid materials.
• To present two distinct methodologies within the PTR framework for enhanced thermal analysis.
• To provide a reliable method for calorimetric studies involving temperature scans.

Main Methods:

• A novel PTR setup designed for temperature-dependent measurements.
• Method 1: Utilizes combined phase and amplitude signal data at a single chopping frequency.
• Method 2: Employs phase signal data acquired at two different chopping frequencies.

Main Results:

• Demonstration of a PTR configuration capable of accurately determining thermal parameters as a function of temperature.
• Validation of two distinct analytical procedures for thermal property extraction.
• Successful application of the proposed methods for temperature-dependent calorimetric studies.

Conclusions:

• The described photothermal radiometry configuration and procedures offer a robust approach for investigating the temperature dependence of thermal properties in solids.
• The presented methods are particularly suitable for calorimetric studies requiring precise temperature scanning.
• This work advances the capabilities of PTR for detailed material thermal analysis.