Electropyroelectric technique for measurement of the thermal effusivity of liquids

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Título :	Electropyroelectric technique for measurement of the thermal effusivity of liquids
Palabras clave :	PHOTOPYROELECTRIC PHOTOTHERMAL
Fecha de publicación :	16-ene-2013
Editorial :	JOURNAL OF PHYSICS D: APPLIED PHYSICS
Descripción :	The photopyroelectric method has been recognized as a reliable and useful tool for the measurement of the thermal properties of condensed matter samples. Usually the photothermal signal is generated using intensity modulated light beams, whose amplitudes are difficult to maintain stable. In this paper we describe a variant of this technique that uses amplitude modulated electrical current as excitation source, via Joule heating of the metal contact on one side of the pyroelectric sensor. The possibilities of this method, called by us the electropyroelectric technique, for thermal effusivity measurements of liquid samples are shown using test samples of distilled water, ethanol and glycerine. The results obtained for this parameter agree well with the values reported in the literature . Our measurement uncertainties are about 3%, a fact that opens several possible applications. INSTITUTO POLITECNICO NACIONAL, CONACYT
URI :	http://www.repositoriodigital.ipn.mx/handle/123456789/11596
Otros identificadores :	doi:10.1088/0022-3727/43/22/225501 http://hdl.handle.net/123456789/1130
Aparece en las colecciones:	Doctorado

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