Design of biocompatible high-piezoelectric BaTiO3 with additives

Kazuyoshi Tsuchiya; Yuya Akagawa; Yasutomo Uetsuji; Eiji Nakamachi

doi:10.1117/12.903230

23 December 2011 Design of biocompatible high-piezoelectric BaTiO₃ with additives

Kazuyoshi Tsuchiya, Yuya Akagawa, Yasutomo Uetsuji, Eiji Nakamachi

Proceedings Volume 8204, Smart Nano-Micro Materials and Devices; 82042A (2011) https://doi.org/10.1117/12.903230
Event: SPIE Smart Nano + Micro Materials and Devices, 2011, Melbourne, Australia

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 BaTiO₃Perovskite 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.

Citation Download Citation

Kazuyoshi Tsuchiya, Yuya Akagawa, Yasutomo Uetsuji, and Eiji Nakamachi "Design of biocompatible high-piezoelectric BaTiO₃ with additives", Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 82042A (23 December 2011); https://doi.org/10.1117/12.903230

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