Dielectric and pyroelectric properties of a composite of ferroelectric ceramic and polyurethane
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Data
2002-05-01
Autores
Sakamoto, W. K.
Kanda, DHF
Das-Gupta, D. K.
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Editor
Springer
Resumo
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 T of the polymer. The pyroelectric coefficient at 34 K is 7.0x10(-5) C(.)m(-2.)K(-1) which is higher than that of P-PVDF (1X10(-5) C(.)m(-2.)K(-1)).
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Palavras-chave
composites, sensors, dielectric relaxation, pyroelectric coefficient, polyurethane
Como citar
Materials Research Innovations. New York: Springer-verlag, v. 5, n. 6, p. 257-260, 2002.