Dielectric and pyroelectric properties of a composite of ferroelectric ceramic and polyurethane |
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| Authors: | Walter K Sakamoto Darcy H Kanda D Das-Gupta |
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| Affiliation: | (1) Departamento de Fisica e Quimica, Universidade Estadual Paulista, UNESP, Campus de Ilha Solteira, Av. Brasil 56, 15.385-000 Ilha Solteira (SP) Brasil,;(2) School of Informatics, University of Wales Bangor, Dean Street, Bangor, Gwynedd, LL57 1UT, UK, |
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| Abstract: | Flexible piezo- and pyroelectric composite was made in the thin film form by spin coating. Lead Zirconate Titanate (PZT) ceramic
powder was dispersed in a castor oil-based polyurethane (PU) matrix, providing a composite with 0–3 connectivity. The dielectric
data, measured over a wide range of frequency (10–5 Hz to 105 Hz), shows a loss peak around 100 Hz related with impurities in the polymer matrix. There is also an evidence of a peak in
the range 10–4 Hz, possibly originating from the glass transition temperature Tg of the polymer. The pyroelectric coefficient at 343 K is 7.0×10–5 C·m–2·K–1 which is higher than that of β-PVDF (1×10–5 C·m–2·K–1).
Electronic Publication |
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| Keywords: | Composites Sensors Dielectric Relaxation Pyroelectric Coefficient Polyurethane |
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