Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9727
Title: PCLT/P(VDF-TrFE) 0-3 nanocomposite thin films for pyroelectric applications
Authors: Zhang, QQ
Chan, HLW 
Zhou, Q
Choy, CL 
Keywords: Lanthanum and calcium modified lead titanate/ vinylidene fluoride-trifluoroethylene (PCLT/P(VDF-TrFE)) composite
Nanocomposite
Pyroelectric sensor
Issue Date: 1999
Publisher: Maney Publishing
Source: Materials research innovations, 1999, v. 2, no. 5, p. 283-288 How to cite?
Journal: Materials research innovations 
Abstract: Nanocrystalline calcium and lanthanum modified lead titanate (PCLT) powder was prepared by a solgel process followed by annealing at 850°C. 0-3 nanocomposite thin films of PCLT powder dispersed in a vinylidene fluoride /trifluoroethylene (P(VDF-TrFE)) copolymer matrix were fabricated on glass substrates using the spin-coating technique. The permittivity, pyroelectric coefficient, specific heat and pyroelectric figures-of-merit were measured as functions of the volume fraction (φ) of ceramic for φ up to 0.16. Single-element pyroelectric sensors with PCLT/P(VDF-TrFE) nanocomposites as the sensing elements were fabricated and characterized. The voltage and current responsivities Rv and Ri of the sensors were measured as functions of frequency and found to agree well with the calculated values. Since the pyroelectric coefficients of PCLT and P(VDF-TrFE) have like signs while the piezoelectric coefficients have opposite signs, the poled composite has high pyroelectric but low piezoelectric activity, thereby reducing the vibration-induced electrical noise in pyroelectric sensor applications.
URI: http://hdl.handle.net/10397/9727
ISSN: 1432-8917
EISSN: 1433-075X
DOI: 10.1007/s100190050099
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