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High accuracy photopyroelectric investigations of dynamic thermal parameters of fluids

D. DADARLAT1, C. NEAMTU1, M. STREZA1, D. CHICEA2,* , A. PASCA2

Affiliation

  1. National R&D Institute for Isotopic and Molecular Technologies, Cluj-Napoca, 400293, Romania
  2. Physics Department, “Lucian Blaga” University, Str. Dr. Ion Ratiu 5-7, Sibiu, 550012, Romania

Abstract

The photopyroelectric calorimetry, in two detection configurations, was applied in order to accurately measure the thermal diffusivity and effusivity of several liquid samples. The thermal diffusivity was investigated in a back PPE configuration using a thermal-wave-resonator-cavity. The thermal effusivity was measured by making use of a frequency scan in a front PPE detection configuration. In both configurations, the pyroelectric sensor and sample were thermally thick and the incident layer optically opaque. The selected particular PPE detection schemes, allowing for high accuracy results (error within ±1%), are used in the paper for some applications on CoFe2O4 ferrofluid..

Keywords

Photopyroelectric calorimetry, Thermal diffusivity, Thermal effusivity, CoFe2O4 ferrofluid.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

D. DADARLAT, C. NEAMTU, M. STREZA, D. CHICEA, A. PASCA, High accuracy photopyroelectric investigations of dynamic thermal parameters of fluids, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 284-287 (2008)