Application of Ferromagnetic Microwires as Temperature Sensors in Measurements of Thermal Conductivity
Margarita Churyukanova,
Andrey Stepashkin,
Aida Sarakueva,
Vadim Mashera,
Yury Grebenshchikov,
Vladimir Odintsov,
Valery Petrov,
Sergey Gudoshnikov
Affiliations
Margarita Churyukanova
College of New Materials and Nanotechnologies, National University of Science and Technology «MISiS», Moscow 119049, Russia
Andrey Stepashkin
College of New Materials and Nanotechnologies, National University of Science and Technology «MISiS», Moscow 119049, Russia
Aida Sarakueva
College of New Materials and Nanotechnologies, National University of Science and Technology «MISiS», Moscow 119049, Russia
Vadim Mashera
College of New Materials and Nanotechnologies, National University of Science and Technology «MISiS», Moscow 119049, Russia
Yury Grebenshchikov
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN), Troitsk, Moscow 108840, Russia
Vladimir Odintsov
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN), Troitsk, Moscow 108840, Russia
Valery Petrov
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN), Troitsk, Moscow 108840, Russia
Sergey Gudoshnikov
College of New Materials and Nanotechnologies, National University of Science and Technology «MISiS», Moscow 119049, Russia
A method for the determination of the thermal conductivity of polymer composite materials by using Co-based ferromagnetic microwires is proposed. Microwire segments were integrated into the samples of studied materials during their manufacture and used as current microheaters and resistance thermometers. As a representative material, we used a material based on nitrile butadiene rubber filled with hexagonal boron nitride after its low-temperature carbonization and a significant increase in thermal conductivity. The thermal conductivity values of composite samples determined during experiments varied from 1.0 W/(m·K) to 1.8 W/(m·K) depending on the percentage of boron nitride. The thermal conductivity values obtained are in good agreement with the estimates obtained by the standard laser flash method.
