Simple and tractable analytical expressions for determining the pyroelectricity in ferroelectric 0-3 composites have been developed. For the dilute suspension limit, expressions for the effective pyroelectric and other thermal electromechanical properties are derived within the framework of the Maxwell–Wagner approach. Then, an effective-medium theory is employed to examine the first and second pyroelectric coefficients in the concentrated suspension regime. The effective-medium approach as compared to the Maxwell–Wagner approach results in a better agreement with known experimental data up to higher volume fraction of inclusions. The pyroelectricity of 0-3 composites of ceramic inclusions embedded in the P(VDF–TrFE) copolymer matrix and of P(VDF–TrFE) inclusions embedded in a ceramic matrix are analyzed numerically under different polarization configurations. The theoretical predictions show that the secondary pyroelectric effects in composite systems with ceramic as the matrix are stronger than those with the copolymer as the matrix and can sometimes dominate the pyroelectricity for certain compositions.
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15 July 2003
Research Article|
July 15 2003
Primary and secondary pyroelectric effects of ferroelectric 0-3 composites
K.-H. Chew;
K.-H. Chew
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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F. G. Shin;
F. G. Shin
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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B. Ploss;
B. Ploss
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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H. L. W. Chan;
H. L. W. Chan
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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C. L. Choy
C. L. Choy
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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K.-H. Chew
F. G. Shin
B. Ploss
H. L. W. Chan
C. L. Choy
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
J. Appl. Phys. 94, 1134–1145 (2003)
Article history
Received:
December 11 2002
Accepted:
April 28 2003
Citation
K.-H. Chew, F. G. Shin, B. Ploss, H. L. W. Chan, C. L. Choy; Primary and secondary pyroelectric effects of ferroelectric 0-3 composites. J. Appl. Phys. 15 July 2003; 94 (2): 1134–1145. https://doi.org/10.1063/1.1583154
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