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Proceedings Paper

Fabrication of high-performance PNN-PZT ceramic using microwave and hot-press hybrid sintering process
Author(s): Hirofumi Takahashi; Jinhao Qiu; Junji Tani; Kunihiro Nagata; Koji Hirose
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Paper Abstract

It has been reported in the author's previous work that the hybrid sintering process, a combination of 28GHz microwave heating and hot-press, yields higher performance in the sintering of PZT ceramics than conventional technologies. The improvement of properties with the hybrid sintering process is due to the increase in the grain size and due to the suppression of Pb evaporation on account of reduction in sintering time. In this study, the hybrid sintering process was applied to the fabrication of PNN-PZT and the influence of the pressure and sintering temperature on the density, electro-mechanical coupling factor and the piezoelectric constants of the sintered specimens were extensively investigated. In the optimized sintering conditions, the maximum achieved value of the piezoelectric constant d31 was about 390 X 10-12 m/V, which is nearly 26 percent high than 310 X 10-12 m/V, the value of d31 of the conventionally sintered specimen. It can be concluded that the hybrid sintering process is an effective means to improve the performance of the materials of Pb extraction.

Paper Details

Date Published: 11 July 2002
PDF: 7 pages
Proc. SPIE 4699, Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics, (11 July 2002); doi: 10.1117/12.474964
Show Author Affiliations
Hirofumi Takahashi, Fuji Ceramics Corp. (Japan)
Jinhao Qiu, Tohoku Univ. (Japan)
Junji Tani, Tohoku Univ. (Japan)
Kunihiro Nagata, National Defense Academy (Japan)
Koji Hirose, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 4699:
Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

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