Smart materials: the functional properties of ceramic/polymer composites and their relation to sol-gel powder preparation

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Abstract

Ferroelectric powders of lead titanate (PT) and calcium modified lead titanate (PTCa) were prepared by the sol-gel process. The gels were dried and heat treated near 500°C (crystallisation temperature) using various procedures. The final ceramic powders were mixed with a polymer, in this case P(VDF-TrFE), 50 % in volume and films of about 100 μm were obtained by hot pressing. The DC conductivity of the composite films at high fields (>10 MV/m) seems to be dependent on the crystallisation process to which the sample was submited. The electroactive properties of the composites were studied.

Original languageEnglish
Title of host publicationAdvanced Materials Forum I: Proceedings of the 1st International Materials Symposium (Materials 2001)
EditorsT. Vieira
PublisherTrans Tech Publications Ltd
Pages177-180
Number of pages4
ISBN (Print)0-87849-905-9
DOIs
Publication statusPublished - 2 Dec 2002
Event1st International Materials Symposium (Materials 2001) - Universidade de Coimbra, Coimbra, Portugal
Duration: 9 Apr 200111 Apr 2001

Publication series

NameKey Engineering Materials
PublisherTrans Tech Publications Ltd
Volume230-232
ISSN (Print)1013-9826

Conference

Conference1st International Materials Symposium (Materials 2001)
CountryPortugal
CityCoimbra
Period9/04/0111/04/01

Keywords

  • Electroactive Materials
  • Ferroelectrics
  • Lead Titanate
  • Piezoelectric Materials
  • Polymer/Ceramic Composites
  • Smart Materials
  • Sol-Gel

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