Speaker
Description
Accurate high-temperature measurement is a critical challenge in various industrial applications, including metallurgy, aerospace, and power generation. Traditional thermocouples and resistance temperature detectors (RTDs) suffer from drift, material degradation, and signal loss at extreme temperatures, necessitating alternative solutions for reliable temperature monitoring. In this work, we explore the potential of glass-coated bistable microwires [1] as a novel method for contactless temperature sensing in environments reaching up to $500$ °C.
Bistable ferromagnetic microwires exhibit a sharp magnetization switching behavior, which is highly sensitive to external temperature variations. By leveraging the temperature dependence of their switching field, we develop a contactless measurement technique that enables real-time monitoring of high-temperature processes. Protective glass coating enhances thermal stability and prevents oxidation, extending the sensor's operational lifetime compared to conventional alternatives [2].
Experimental results demonstrate that the microwires maintain their bistable behavior and provide a measurable and reproducible signal up to $500$ °C. This technology offers a non-invasive, wireless, and durable alternative for high-temperature sensing in industrial settings where conventional probes fail. The proposed method paves the way for innovative, cost-effective solutions for real-time temperature monitoring in extreme environments.
Acknowledgements
This work was partially supported by the projects APVV-16-0079 and VEGA-1/0180/23
References
[1] R. Varga et al., “Magnetically Bistable Microwires: Properties and Applications for Magnetic Field, Temperature, and Stress Sensing,” Springer Series in Materials Science. Springer International Publishing, pp. 169–212, 2017. https://doi.org/10.1007/978-3-319-49707-5_8
[2] P. Klein et al., “Bistable FeCoMoB microwires with nanocrystalline microstructure and increased Curie temperature,” Journal of Physics D: Applied Physics, vol. 43, no. 4. IOP Publishing, p. 045002, Jan. 12, 2010. https://doi.org/10.1088/0022-3727/43/4/045002
