0478278 - ÚPT 2018 RIV CZ eng C - Conference Paper (international conference)
Králík, Tomáš - Musilová, Věra - Srnka, Aleš - Fořt, Tomáš - Frolec, Jiří
Role of the superconductivity in radiative heat transfer.
14th Cryogenics 2017. IIR International Conference. Proceedings. Praha: ICCEX, 2017, s. 132-138. ISBN 978-2-36215-022-7. ISSN 0151-1637.
[Cryogenics 2017 /14./. IIR International Conference. Dresden (DE), 15.05.2017-19.05.2017]
R&D Projects: GA MŠMT(CZ) LO1212; GA ČR(CZ) GA14-07397S
Institutional support: RVO:68081731
Keywords : thermal radiation * near field * superconductivity
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

The absorption and emission of thermal radiation by metals is related to their electrical properties that are influenced by impurities, defects and temperature. We show by some examples of measurements on common metals how different can be the thermal radiative properties. When the heat is transferred across a microscopic vacuum gap in the near field regime, it is possible to achieve a step-like change of the heat
transfer based on a superconducting transition. An interesting feature of this effect is the nonlinear thermal conductivity effecting a change of the sign of the differential thermal conductivity across the vacuum gap.
Permanent Link: http://hdl.handle.net/11104/0274397