NDLI: Determination of the pyroelectric coefficient within pyroelectric materials by using space charge measurements

Content Provider	IEEE Xplore Digital Library
Author	Banet, L. Castellon, J. Malucelli, G. Bouanga, C.V. Frechette, M. Toureille, A. Agnel, S.
Copyright Year	2012
Description	Author affiliation: Institut d'Electronique du Sud, Université Montpellier 2, France (Banet, L.; Castellon, J.; Toureille, A.; Agnel, S.) \|\| Politecnico di Torino (POLITO), Torino, Italy (Malucelli, G.) \|\| Institut de recherche d'Hydro-Québec (IREQ), Canada (Bouanga, C.V.; Frechette, M.)
Abstract	In this paper, a new theory allowed calculating the pyroelectric coefficient “p” using the diffusion of a thermal wave within materials having a pyroelectric effect. The demonstration is performed on materials composed by various percentages of a cycloaliphatic epoxy (CE) resin and of a flexibilizing comonomer (1,6-hexanediol diglycidyl ether — HDGE). By using an electric field measurement technique (the Thermal Step Method — TSM), the signal obtained on these materials (a current) presents an atypical form, which requires the modification of the theoretical model of the TSM. Indeed, the theory of the TSM technique has been initially developed for insulating materials with a high dielectric time constant. An adaptation of the technique is thus necessary to analyze the behavior of materials, which present a modification of their molecular structure during the application of the thermal wave. During a space charge characterization performed on these materials, we have observed an atypical shape for the thermal step currents. To help in the interpretation, the broadband dielectric spectroscopy and the Differential Scanning Calorimetry technique (DSC) were used to obtain additional information. Considering these results, a circuit containing a resistor and a capacitor in series has been used for modeling the materials. This equivalent circuit constitutes the beginning of the new theory, which is developed in this paper. The pyroelectric coefficient generated by the thermal step diffusion, due to the presence of a pyroelectric effect of these studied materials, has been calculated using the detailed model.
Starting Page	215
Ending Page	218
File Size	462306
Page Count	4
File Format	PDF
ISBN	9781467312530
ISSN	00849162
e-ISBN	9781467312523
e-ISBN	9781467312516
DOI	10.1109/CEIDP.2012.6378759
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Materials Dielectrics Space charge Dielectric measurements Temperature measurement Spectroscopy Current measurement
Content Type	Text
Resource Type	Article

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