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Calcium‐ and Lanthanum‐Modified Lead Titanate (PCLT) Ceramic and PCLT/Vinylidene Fluoride‐Trifluoroethylene 0‐3 Nanocomposites
Author(s) -
Zhang Q. Q.,
Chan H. L. W.,
Zhou Q. F.,
Choy C. L.
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01539.x
Subject(s) - materials science , lead titanate , ceramic , nanocomposite , poling , lanthanum , pyroelectricity , composite material , grain size , calcium titanate , particle size , sintering , piezoelectricity , titanate , sol gel , mineralogy , ferroelectricity , chemical engineering , dielectric , nanotechnology , inorganic chemistry , chemistry , optoelectronics , engineering
Calcium‐ and lanthanum‐modified lead titanate (PCLT) powders with size in the nanometer range were prepared by a sol–gel process. The PCLT gel was annealed at 850°C to produce powder with an average particle diameter of 80 nm. A dense and fine‐grained PCLT ceramic, with grain size of ∼0.7 μm, was prepared by sintering the sol–gel‐derived powder at 1150°C. The piezoelectric and pyroelectric properties of the PCLT ceramic varied linearly with the degree of poling in the ceramic. PCLT/vinylidene fluoride‐trifluoroethylene (P(VDF‐TrFE)) 0‐3 nanocomposites with PCLT volume fractions of 0.1–0.5 were fabricated, using PCLT powders imbedded in a P(VDF‐TrFE) matrix. The ceramic data were used to model the piezoelectric and pyroelectric properties of the PCLT/P(VDF‐TrFE) composites, and good agreements were obtained.