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Fabrication of Piezoelectric PZT Film Actuators on Thin Metal Plates Prepared by a Hydrothermal Method

Published online by Cambridge University Press:  26 February 2011

Tuyoshi Aoki ,
Shigeyoshi Umemiya ,
Masaharu Hida ,
Keisuke Satoh ,
Masao Kondo  and
Kazuaki Kurihara
Tuyoshi Aoki
Affiliation:
aoki-t@jp.fujitsu.com, Fujitsu Ltd., Advanced Materials Laboratory, 10-1 Moriyonosato, Wakamiya, Atsugi, 243-0197, Japan, +81-46-250-8362, +81-46-248-8812
Shigeyoshi Umemiya
Affiliation:
umemiya.shigeyo@jp.fujitsu.com, Fujitsu Ltd., Atsugi, 243-0197, Japan
Masaharu Hida
Affiliation:
hida.masaharu@jp.fujitsu.com, Fujitsu Ltd., Atsugi, 243-0197, Japan
Keisuke Satoh
Affiliation:
ksatoh@flab.fujitsu.co.jp, Fujitsu Ltd., Atsugi, 243-0197, Japan
Masao Kondo
Affiliation:
condor@labs.fujitsu.com, Fujitsu Ltd., Atsugi, 243-0197, Japan
Kazuaki Kurihara
Affiliation:
kurihara@flab.fujitsu.co.jp, Fujitsu Ltd., Atsugi, 243-0197, Japan
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Abstract

Hydrothermal lead zirconate titanate (Pb(Zr,Ti)O3: PZT) films with a thick of about 10 μm on both a Ti foil and a Ti layer sputtered stainless steel (SS) foil were obtained. Both PZT films showed same morphology and crystalinity. After repeating the hydrothermal process, the films were formed to cantilever shape. A tip displacement measurement of the cantilevers was carried out in order to estimate transverse piezoelectric constant (d31). The obtained d31 value of the PZT films on Ti sputtered SS foils is -29 pm/V, which is larger than that on Ti foil (-24 pm/V). Amorphous layer consist of Pb and Ti was observed at the interfaces between the both PZT film and the Ti metals. The thickness of the layer for PZT film on Ti foil (350 nm) is thicker than that for PZT film on SS foil (200 nm). The relative permittivity of the layer is estimated to be small compared with that of PZT. Accordingly, the effective electric field for PZT layer is decreased. The deference of d31 values between the obtained PZT films is thought to be attributed to the thickness of amorphous layer.

Keywords

piezoelectrichydrothermalferroelectric
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 966: Symposium T – Ferroelectrics and Multiferroics , 2006 , 0966-T07-01
Copyright
Copyright © Materials Research Society 2007

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