On the effective properties of thermo-piezoelectric matrix composites

Explicit expressions for the effective pyroelectric, dielectric, piezoelectric, elastic and thermoelastic constants of a matrix composite have been obtained in closed form. A numerical analysis has been carried out of the concentration dependences of constants of a composite in which the BaTiO3 cera...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2001-10, Vol.34 (20), p.3058-3063
Main Authors: Levin, V M, Luchaninov, A G
Format: Article
Language:English
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Summary:Explicit expressions for the effective pyroelectric, dielectric, piezoelectric, elastic and thermoelastic constants of a matrix composite have been obtained in closed form. A numerical analysis has been carried out of the concentration dependences of constants of a composite in which the BaTiO3 ceramics is the matrix while the inclusions are represented by spheroidal ceramic particles of PZT-19. A case is examined when the matrix and the inclusions possess opposite polarization. At a certain concentration of PZT-19 the composite exhibits pronounced pyroelectric properties without having any appreciable piezoeffect. At another concentration, it manifests marked piezoelectric properties, but does not possess the pyroeffect. Practical implementations of the results are discussed. (Author)
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/34/20/309