PYROELECTRIC PROPERTIES OF PBTIO3 P(VDF-TRFE) 0-3 NANOCOMPOSITE FILMS/

Nanocrystalline lead titanate (PbTiO3 or PT) powder has been prepared by the sol-gel process followed by annealing at 700 degrees C. Using t he spin-coating technique, 0-3 nanocomposite thin films of PT powder d ispersed in a vinylidene fluoride-trifluoroethylene P(VDF-TrFE) copoly mer matrix have been fabricated on glass substrates. The permittivity, pyroelectric coefficient, specific heat and pyroelectric figures-of-m erit have been measured as functions of the volume fraction (phi) of c eramic for phi up to 0.12. All three figures-of-merit (current, voltag e and detectivity) were found to increase with increasing phi. (C) 199 8 Published by Elsevier Science S.A. All rights reserved.