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Proceedings Paper

Photopyroelectric method using a thermal wave resonator cavity for detection of phase transitions in agar
Author(s): R. Medina-Esquivel; J. Martin Yanez-Limon; Juan Jose Alvarado-Gil
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Paper Abstract

In this work, the Photopyroelectric (PPE) technique using a Thermal Wave Resonator Cavity (TWRC) is used to measure the thermal diffusivity of agar. We, determine the liquid to gel phase transition temperature as a function of agar concentration, detecting a shift in that temperature. As agar concentration decreases, the phase transition temperatures get lower. The thermal diffusivity of agar as a function of temperature was measure by means of a cavity length variation due to thermal expansion of the TWRC. It was compared against the typical mechanic length variation with a micrometer.

Paper Details

Date Published: 14 February 2005
PDF: 8 pages
Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); doi: 10.1117/12.611751
Show Author Affiliations
R. Medina-Esquivel, Ctr. de Investigacion y de Estudios Avanzados del IPN (Mexico)
J. Martin Yanez-Limon, Ctr. de Investigacion y de Estudios Avanzados del IPN (Mexico)
Juan Jose Alvarado-Gil, Ctr. de Investigacion y de Estudios Avanzados del IPN (Mexico)

Published in SPIE Proceedings Vol. 5776:
Eighth International Symposium on Laser Metrology
R. Rodriguez-Vera; F. Mendoza-Santoyo, Editor(s)

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