Abstract
The piezoelectric constants d31, d32, d33a were measured for the undrawn and uniaxially drawn copolymer of vinylidene fluoride (80 mol%) and tetrafluoroethylene (20 mol%) as a function of remanent polarization Pr. The data of undrawn samples are consistent with the assumption that the piezoelectric activity mainly arises from macroscopic dimensional changes. Drawn samples show a strong in-plane anisotropy so that d31 is much larger than d32. Such an anisotropy is mostly attributable to anisotropic Poisson’s ratio. The temperature dependence of the piezoelectric constants is discussed. The pyroelectric constant p3 was measured as a function of Pr. Using piezoelectric and thermal expansion data, the contribution from the secondary effect was calculated and found to be 1/4 the total activity.
Similar content being viewed by others
Article PDF
References
H. Kawai, Jpn. J. Appl. Phys., 8, 976 (1969).
J. G. Bergman, Jr., J. H. Mcfee, and G. R. Grane, Appl. Phys. Lett., 18, 203 (1971).
R. Hayakawa and Y. Wada, Adv. Polym. Sci., 11, 1 (1973).
N. Murayama, K. Nakamura, H. Obara, and M. Segawa, Ultrasonics, 14, 15 (1976).
R. G. Kepler, Ann. Rev. Phys., Chem., 29, (1979).
E. Fukuda, Proceedings of the 2nd Meeting on Ferroelectric Materials and Their Applications, Kyoto, 1979.
R. G. Kepler and R. A. Anderson, J. Appl. Phys., 49, 1232 (1978).
D. Naegele and D. Y. Yoon, Appl. Phys. Lett., 33, 132 (1978).
T. Furukawa, M. Date, and E. Fukada, J. Appl. Phys., 51, 1135 (1980).
T. Furukawa and G. E. Johnson, Appl. Phys. Lett., 38, 1027 (1981).
J. B. Lando and W. W. Doll, J. Macromol. Sci., Phys., B, 2, 205 (1968).
A. I. Baise, H. Lee, B. Oh, R. E. Salomon, and M. M. Labes, Appl. Phys. Lett., 26, 428 (1975).
G. T. Davis and M. G. Broadhurst, “Piezoelectricity and Pyroelectricity in polar polymers,” in International Symposium on Electrets and Dielectrics,” M. S. de Campos, Ed., Academia Brasileira de Ciencias, Rio de Janeiro, 1977, p 299.
R. E. Collins, M. G. Broadhurst, and G. T. Davis, “Studies in Electrical and Electronic Engineering, 2, Charge Storage, Charge Transport and Electrostatics with Their Applications,” Y. Wada, M. M. Perlman, and H. Kokado Ed., 1979.
H. Stefanou, J. Appl. Phys., 50, 1480 (1979).
J. C. Hicks, T. E. Jones, and J. C. Logan, J. Appl. Phys., 51, 1135 (1980).
M. G. Broadhurst, G. T. Davis, J. E. McKinney, and R. E. Collions, J. Appl. Phys., 49, 4992 (1978).
W. G. Cady, “Piezoelectricity,” Dover, New York, 1964.
T. Furukawa, J. X. Wen, K. Suzuki, Y. Takashina, and M. Date, J. Appl. Phys., 56, 829 (1984).
T. Furukawa, J. Aiba, and E. Fukada, J. Appl. Phys., 50, 3615 (1979).
N. Koizumi, J. Hagino, and Y. Murata, Ferroelectrics, 32, 141 (1981).
E. Fukada and S. Takashita, Jpn. J. Appl. Phys., 8, 960 (1969).
M. Date, T. Furukawa, and E. Fukada, J. Appl. Phys., 51, 3830 (1980).
Y. Wada and R. Hayakawa, Ferroelectrics, 32, 116 (1981).
S. Tasaka and S. Miyata, Ferroelectrics, 32, 17 (1981).
J. X. Wen, Jpn. J. Appl. Phys., submitted.
H. Sussner, Phys. Lett., 58A, 426 (1976).
H. Ohigashi, J. Appl. Phys., 47, 949 (1976).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wen, J. Piezoelectricity and Pyroelectricity in a Copolymer of Vinylidene Fluoride and Tetrafluoroethylene. Polym J 17, 399–407 (1985). https://doi.org/10.1295/polymj.17.399
Issue Date:
DOI: https://doi.org/10.1295/polymj.17.399