The role of crystallisation process of ferroelectric ceramic gels on the electroactive properties of sol-gel ceramic/polymer composites

Author

Igreja, Rui ; Dias, Carlos J. ; Marat-Mendes, J.N.

Author_Institution

Fac. de Ciencias e Tecnologia, Univ. Nova de Lisboa

fYear

1999

fDate

1999

Firstpage

631

Lastpage

634

Abstract

The method of preparation and the characterisation of lead titanate (PT) and calcium modified lead titanate (PTCa) ceramic gels has been discussed previously. This paper is concerned with the role of the crystallisation process of the dried gels and the relationship between the crystallisation process and the electroactive properties of the final ceramic powders used as a filler material on ferroelectric ceramic/polymer composites. The ferroelectric ceramic powders produced by the sol-gel technique were mixed with P(VDF-TrFE) with a 50% volume of ceramic and films of about 100 μm were made by hot pressing in order to study their electroactive properties

Keywords

ceramics; crystallisation; dielectric polarisation; ferroelectric materials; filled polymers; hot pressing; permittivity; pyroelectricity; sol-gel processing; PbCaTiO₃; PbTiO₃; crystallisation; dielectric polarisation; electroactive properties; ferroelectric ceramic gels; hot pressing; permittivity; pyroelectric coefficient; sol-gel ceramic/polymer composites; Calcium; Ceramics; Composite materials; Crystalline materials; Crystallization; Ferroelectric films; Ferroelectric materials; Polymer gels; Powders; Titanium compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-5025-1

Type

conf

DOI

10.1109/ISE.1999.832125

Filename

832125