About: Factors Influencing Thermal Radiative Properties of Metals

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Data on thermal absorptivity and emissivity are important for calculations of heat flows in cryogenic devices. Although thermal radiative properties of materials used in cryogenics are measured, published and used for more than sixty years we have noticed that sometimes users of that data don’t well understand the significance of individual factors influencing thermal radiative properties. The sensitivity of the thermal radiative properties of metals to the condition of the surface and the difficulty of measurement, especially at low temperatures is probably the reason of dispersion of the published values. The effect of the material and its purity, finishing (machining, mechanical or chemical polishing) and of the protective coatings or accidental layers (water, oxidation) on the thermal radiative properties is not always obvious. Influence of the material, surface treatment, roughness and layers on the surface is discussed on the basis of our 20 year experience with measurement of the emissivity and absorptivity in the range from 20 K to 300 K. Data on thermal absorptivity and emissivity are important for calculations of heat flows in cryogenic devices. Although thermal radiative properties of materials used in cryogenics are measured, published and used for more than sixty years we have noticed that sometimes users of that data don’t well understand the significance of individual factors influencing thermal radiative properties. The sensitivity of the thermal radiative properties of metals to the condition of the surface and the difficulty of measurement, especially at low temperatures is probably the reason of dispersion of the published values. The effect of the material and its purity, finishing (machining, mechanical or chemical polishing) and of the protective coatings or accidental layers (water, oxidation) on the thermal radiative properties is not always obvious. Influence of the material, surface treatment, roughness and layers on the surface is discussed on the basis of our 20 year experience with measurement of the emissivity and absorptivity in the range from 20 K to 300 K. (en)
Title	Factors Influencing Thermal Radiative Properties of Metals Factors Influencing Thermal Radiative Properties of Metals (en)
skos:prefLabel	Factors Influencing Thermal Radiative Properties of Metals Factors Influencing Thermal Radiative Properties of Metals (en)
skos:notation	RIV/68081731:_____/14:00434010!RIV15-GA0-68081731
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED0017/01/01), P(GA14-07397S), P(LO1212)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Hanzelka, Pavel Srnka, Aleš Musilová, Věra Králík, Tomáš
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav přístrojové techniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	16354
http://linked.open...ai/riv/idVysledku	RIV/68081731:_____/14:00434010
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	emissivity; absorptivity; radiative heat transfer; surface finish; cryogenics (en)
http://linked.open.../riv/klicoveSlovo	radiative heat transfer surface finish absorptivity cryogenics emissivity
http://linked.open...ontrolniKodProRIV	[CA623595B60A]
http://linked.open...v/mistoKonaniAkce	Praha
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	Cryogenics 2014. The 13th IIR International Conference Proceedings
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	ALISI - Centre of advanced diagnostic methods and technologies APPLICATION LABORATORIES OF ADVANCED MICROTECHNOLOGIES AND NANOTECHNOLOGIES Vliv blízkého pole na přenos tepla zářením za nízkých teplot
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Hanzelka, Pavel Králík, Tomáš Musilová, Věra Srnka, Aleš
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open...ain/vavai/riv/wos	000346089100039
http://linked.open.../riv/zahajeniAkce	2014-04-07 (xsd:date)
issn	0151-1637
number of pages	9 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Icaris
https://schema.org/isbn	978-2-36215-002-9

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