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Proceedings Paper

Design of biocompatible high-piezoelectric BaTiO3 with additives
Author(s): Kazuyoshi Tsuchiya; Yuya Akagawa; Yasutomo Uetsuji; Eiji Nakamachi
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Paper Abstract

Recently, the developments of lead-free materials such as BaTiO3 have been widely investigated. However, the piezoelectricities for those materials are not superior to existing lead-included materials such as PZT. In order to design high piezoelectric materials, we propose the analytical technique, which is able to consider the influence of additives added into biocompatible lead-free piezoelectric materials BaTiO3. Because, the additives are effective technique to improve the piezoelectricities of piezoelectric materials in general. In this research, we proposed the analytical method by using the Rietveld method to quantitatively confirm the changing of diffraction intensities for BaTiO3 (which shows relative relationship with piezoelectricity experimentally) with changing the additive atoms at the appropriate chemical composition. Especially, the factors in the equation in regard to XRD (X-ray diffraction) diffraction intensities in the Rietveld method in order to change and improve piezoelectricities by various additives were investigated by comparing to the XRD intensity for non-added BaTiO3. Firstly, the theoretical diffraction pattern in regard to BaTiO3 Perovskite crystal structure were characterized by using the non-linear least square method. Secondly, the diffraction intensities for BaTiO3 material added various additives to displace B-site of Perovskite structure for BaTiO3 at the rate of 10% were calculated. Finally, the difference diffraction intensities between BaTiO3(111) and BaTiO3(111) added additives such as a periodic atoms were also calculated. As a result, the correlation factor between the atomic scattering factor and the changing amount of the diffraction intensity of BaTiO3(111) shows strong negative correlation of -0.997 to improve piezoelectricity. And also it is confirm that the X-ray absorption rate contributes to the change in the diffraction intensity periodically in local region.

Paper Details

Date Published: 23 December 2011
PDF: 8 pages
Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 82042A (23 December 2011); doi: 10.1117/12.903230
Show Author Affiliations
Kazuyoshi Tsuchiya, Tokai Univ. (Japan)
Yuya Akagawa, Tokai Univ. (Japan)
Yasutomo Uetsuji, Osaka Institute of Technology (Japan)
Eiji Nakamachi, Doshisha Univ. (Japan)

Published in SPIE Proceedings Vol. 8204:
Smart Nano-Micro Materials and Devices
Saulius Juodkazis; Min Gu, Editor(s)

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