The thermal-analysis-based high-temperature contact-angle goniometer is an experimental instrument widely used in materials science, surface science, and liquid–interface research. It enables the measurement of contact angles under elevated temperatures, thereby providing insights into the wettability of material surfaces and the interactions between liquids and solids.

　　The contact angle is an important parameter for characterizing the interfacial properties at the liquid–solid interface. It can be used to evaluate the wettability of a material’s surface, which refers to the extent to which a liquid spreads on that surface. By measuring the contact angle, we can gain insights into the adsorption and desorption behavior of liquids on solid surfaces, thereby assessing the adhesion and stability of liquids on material surfaces.

　　Traditional contact-angle measurement methods are typically conducted at ambient temperature; however, in certain specialized fields—such as materials research and industrial applications under high-temperature conditions—the results obtained at room temperature fail to accurately reflect the true performance of the material. Consequently, the development of thermal-analysis-based, visualized high-temperature contact-angle measurement instruments has filled this gap.

　　The thermal-analysis-based high-temperature contact-angle tester consists of a high-temperature stage and a visualization system. The high-temperature stage provides a high-temperature environment, enabling tests to be conducted at the desired temperature. The visualization system allows real-time observation of changes in the contact angle and, through image processing and data analysis, delivers accurate test results.

　　This type of testing instrument has a wide range of applications. In the field of materials science, it can be used to investigate the wettability, surface activity, and interfacial properties of materials at elevated temperatures. For example, in the case of coating materials, a thermal-analysis-based visual high-temperature contact-angle tester can evaluate their wettability and corrosion resistance under high-temperature conditions, thereby guiding the selection and design of coatings.

　　In the field of surface science, thermal-analysis-based high-temperature contact-angle visualization instruments can be used to investigate the morphology, chemical composition, and wettability of solid surfaces. By monitoring changes in the contact angle, one can determine the hydrophilic or hydrophobic nature of a solid surface, thereby providing a theoretical foundation for the application of liquids on solid surfaces.

　　In industrial applications, thermal-analysis-based high-temperature contact-angle measurement systems can be used to evaluate the heat resistance and thermal stability of materials. For instance, in the aerospace sector, measuring the contact angle of materials at elevated temperatures allows for the assessment of their fire-resistant performance under high-temperature conditions, thereby providing valuable guidance for material selection and application.

　　In summary, the thermal-analysis–based visual high-temperature contact-angle goniometer is a crucial experimental instrument widely used in materials science, surface science, and liquid–interface research. It enables the measurement of contact angles under high-temperature conditions, thereby elucidating the wettability of material surfaces and the interactions between liquids and solids. With continuous advances in science and technology, the significance of this instrument in both research and practical applications is expected to grow even further.