Method for emissivity measurement of semitransparent coatings at ambient temperature

Abstract Coatings deposited on a material surface are effective way of changing its surface properties. For increasing or decreasing radiation heat transfer, coatings with high or low emissivity are used. Measurement of spectral emissivity is a fundamental step to effective use of coatings for this...

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Autores principales:	Petra Honnerová, Jiří Martan, Zdeněk Veselý, Milan Honner
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7625350459d54c37918eca8826007d1f
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spelling	oai:doaj.org-article:7625350459d54c37918eca8826007d1f2021-12-02T11:53:02ZMethod for emissivity measurement of semitransparent coatings at ambient temperature10.1038/s41598-017-01574-x2045-2322https://doaj.org/article/7625350459d54c37918eca8826007d1f2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01574-xhttps://doaj.org/toc/2045-2322Abstract Coatings deposited on a material surface are effective way of changing its surface properties. For increasing or decreasing radiation heat transfer, coatings with high or low emissivity are used. Measurement of spectral emissivity is a fundamental step to effective use of coatings for this application. Up to now the measurement methods are focused on bulk samples and mainly opaque ones. Here we present a method enabling measurement of emissivity of semitransparent coating itself, although it is deposited on a substrate. The method is based on measurement of transmittance and reflectance using an integration sphere system and Fourier transform infrared (FTIR) spectrometer for samples with two different coating thicknesses deposited on transparent substrates. Measured transmittance of the coating indicates spectral regions of potential emissivity differences using different substrates. From all the measured values, spectral emissivity can be characterized for different coating thicknesses. The spectral range of the method is from 2 μm to 20 μm. The measurement is done at ambient temperature enabling measurement of samples sensitive to heating like biomedical or nanocoatings. The method was validated on known bulk samples and an example of semitransparent coating measurement is shown on high-temperature high-emissivity coating.Petra HonnerováJiří MartanZdeněk VeselýMilan HonnerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Petra Honnerová Jiří Martan Zdeněk Veselý Milan Honner Method for emissivity measurement of semitransparent coatings at ambient temperature
description	Abstract Coatings deposited on a material surface are effective way of changing its surface properties. For increasing or decreasing radiation heat transfer, coatings with high or low emissivity are used. Measurement of spectral emissivity is a fundamental step to effective use of coatings for this application. Up to now the measurement methods are focused on bulk samples and mainly opaque ones. Here we present a method enabling measurement of emissivity of semitransparent coating itself, although it is deposited on a substrate. The method is based on measurement of transmittance and reflectance using an integration sphere system and Fourier transform infrared (FTIR) spectrometer for samples with two different coating thicknesses deposited on transparent substrates. Measured transmittance of the coating indicates spectral regions of potential emissivity differences using different substrates. From all the measured values, spectral emissivity can be characterized for different coating thicknesses. The spectral range of the method is from 2 μm to 20 μm. The measurement is done at ambient temperature enabling measurement of samples sensitive to heating like biomedical or nanocoatings. The method was validated on known bulk samples and an example of semitransparent coating measurement is shown on high-temperature high-emissivity coating.
format	article
author	Petra Honnerová Jiří Martan Zdeněk Veselý Milan Honner
author_facet	Petra Honnerová Jiří Martan Zdeněk Veselý Milan Honner
author_sort	Petra Honnerová
title	Method for emissivity measurement of semitransparent coatings at ambient temperature
title_short	Method for emissivity measurement of semitransparent coatings at ambient temperature
title_full	Method for emissivity measurement of semitransparent coatings at ambient temperature
title_fullStr	Method for emissivity measurement of semitransparent coatings at ambient temperature
title_full_unstemmed	Method for emissivity measurement of semitransparent coatings at ambient temperature
title_sort	method for emissivity measurement of semitransparent coatings at ambient temperature
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7625350459d54c37918eca8826007d1f
work_keys_str_mv	AT petrahonnerova methodforemissivitymeasurementofsemitransparentcoatingsatambienttemperature AT jirimartan methodforemissivitymeasurementofsemitransparentcoatingsatambienttemperature AT zdenekvesely methodforemissivitymeasurementofsemitransparentcoatingsatambienttemperature AT milanhonner methodforemissivitymeasurementofsemitransparentcoatingsatambienttemperature
_version_	1718394872970346496

Method for emissivity measurement of semitransparent coatings at ambient temperature

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