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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Porosity-Graded Piezoelectric Ceramics: Processing...

Porosity-Graded Piezoelectric Ceramics: Processing and Electric-Induced Displacement

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Abstract:

Uniformly porous and porosity-graded piezoelectric ceramics were prepared by sintering powder compacts consisting of lead zirconate titanate (PZT) and organic material powders as pore-forming agents (PFA) in air atmosphere. The dielectric, elastic and piezoelectric properties of uniformly porous PZT ceramics were investigated as a function of the porosity volume fraction. The electric-field-induced deflection characteristics of the beam-shaped actuator samples were measured with electric strain gages, and compared with the values calculated from the modified classical laminate theory using the elastic and piezoelectric constants of the non-FGM porous PZT ceramics.

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Periodical:

Materials Science Forum (Volumes 475-479)

Pages:

1567-1570

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.1567

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Cite this paper

Online since:

January 2005

Authors:

Jing Feng Li, Hai Long Zhang, Kenta Takagi, Ryuzo Watanabe

Keywords:

Ceramic Actuator, Functionally Graded Material (FGM), Piezoelectric Ceramic (PZT), Porous Material

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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[1] J. -F. Li, K. Takagi, N. Terakubo and R. Watanabe: Appl. Phys. Lett. Vol. 79 (2001), p.2441.

[2] K. Takagi, J. -F. Li, S. Yokoyama, R. Watanabe, A. Almajid and M. Taya: Sci. Tech. Adv. Mater. Vol. 3 (2002), p.217.

[3] K. Takagi, J. -F. Li, S. Yokoyama, R. Watanabe, A. Almajid and M. Taya: J. Euro. Ceram. Soc. Vol. 23 (2003), p.1577.

[4] J. -F. Li, K. Takagi, M. Ono, W. Pan, R. Watanabe, A. Almajid and M. Taya: J. Am. Ceram. Soc. Vol. 86 (2003), p.1094.

[5] K. Takagi, J. -F. Li, S. Yokoyama and R. Watanabe: Mater. Sci. Forum Vol. 423-425 (2003), p.405.

[6] J. -F. Li, H. L. Zhang, K. Takagi and R. Watanabe: Key Eng. Mater. (2004), in press. Fig. 5 Cross section of the porosity-graded PZT ceramics with stearic acid addition as a PFA.

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0 0. 5 1. 0 1. 5 2. 0 2. 5 3. 0 3. 5 Composition profile exponent, m Applied voltage = 100V Curvature, k / 10-3 m-1 Fig. 6 Piezoelectric strain induced curvatures of the PZT bending actuator as a function of the composition profile exponent m.