High Temperature Thermal Conductivity Testing with Mica TPS Sensor

By Landen MacDonald, Market Research Analyst

Thermal conductivity is an essential property of materials that affects their performance and durability in various applications. Using the transient plane source method for testing thermal conductivity has many benefits as a quick, easy, and accurate test method. With C-Therm’s new Mica TPS Sensor, high-temperature testing capabilities have been added to the ever-expanding techniques available on the TRIDENT Thermal Conductivity Instrument.

The new Mica TPS Sensor has an operational temperature range between 300°C and 500°C, which is wider than the standard high-temp TPS range of 400°C to 500°C. This capability is advantageous as there have previously been data gaps between the 300°C to 400°C range regarding high-temperature thermal conductivity measurements using the TPS method. [1,2,3,4,5]

Figures 4 and 5 show that the Mica TPS Sensor can accurately measure thermal conductivity and diffusivity in the range of 300 to 500°C. As shown in Figure 4, the measurements obtained between 300 to 400°C are accurate within 5% bias. These results are significant as this area has previously had inaccurate results with ±40-50% bias. Similarly, the diffusivity values shown in Figure 5, measured between 300 to 400°C, all had acceptable values within 5% bias.

With these new capabilities, TRIDENT allows professionals to fill in missing thermal conductivity data with an easy-to-use TPS sensor. As thermal conductivity is a temperature-dependent property, high-temperature testing can provide valuable insight into materials’ thermal behavior and reliability under realistic operating conditions. High-temperature testing can also improve the quality and safety of products and processes that involve heating or cooling.

If you want to learn more about the new Mica TPS500 sensor, contact us at info@ctherm.com or request a quote here.

Reference

[1] Bonacina, Cesare et al. “EXPERIMENTAL EVALUATION OF THERMAL PROPERTIES OF AUTOCLAVED AERATED CONCRETE AT HIGH TEMPERATURE.” (2011).

[2] Jansson, Robert E.. “Measurement of thermal properties at elevated temperatures – Brandforsk project 328-031.” (2004).

[3] White, J.F., Rigas, K., Peter Andersson, S. et al. Thermal Properties of Söderberg Electrode Materials. Metall Mater Trans B 51, 1928–1932 (2020). doi.org/10.1007/s11663-020-01890-0

[4] Xie, Bingyu. Effect of Heating Rate on the Thermal…, University of Alberta, 2019, doi.org/10.7939/r3-rbyq-cz88.

[5] Venkatesh, K., Wasim, K. “Effect of Temperature on Thermal Properties of Different Types of High-Strength Concrete.” American Society of Civil EngineersHigh. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000225