Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3-Ba2NaNb5O15 piezoceramics by inverse method

Conference contribution


Publication Details

Author(s): Yoshida K, Kakimoto KI, Weiß M, Rupitsch S, Lerch R
Publisher: IOP PUBLISHING LTD
Publication year: 2016
Volume: 55
Journal issue: 10
ISSN: 0021-4922


Abstract


The enhancement of the piezoelectric, dielectric, and elastic properties of lead-free piezoceramics is essential to achieving a usable alternative to common lead-based piezoceramics. In this contribution, the temperature dependences of the material constants for 0.985(Na0.5K0.5)NbO3- 0.015Ba(2)NaNb(5)O(15) (NKN-1.5BNN) were characterized and compared with those of MnO-doped (Na0.5K0.5)NbO3 (NKN-Mn). The material constants were determined by the simulation-based inverse method. As a result, NKN-Mn and NKN-1.5BNN were found to show significant differences in the temperature behaviors of piezoelectric, elastic, and dielectric constants. In particular, for temperatures less than 40 degrees C, material constants that mainly affect shear mode vibration in NKN-1.5BNN gradually increased with increasing temperature, whereas those of NKN-Mn remained constant because of a different crystal structure. In addition, we explain the observed mechanical softness of NKN-1.5BNN in the shear direction on the basis of characteristic material constant relations, macroscopic (scanning electron microscopy), and crystal structure examinations (X-ray diffractometry). (C) 2016 The Japan Society of Applied Physics



FAU Authors / FAU Editors

Lerch, Reinhard Prof. Dr.-Ing.
Lehrstuhl für Sensorik
Rupitsch, Stefan PD Dr.
Lehrstuhl für Sensorik
Weiß, Manuel
Lehrstuhl für Sensorik


External institutions with authors

Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku


How to cite

APA:
Yoshida, K., Kakimoto, K.-I., Weiß, M., Rupitsch, S., & Lerch, R. (2016). Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3-Ba2NaNb5O15 piezoceramics by inverse method. IOP PUBLISHING LTD.

MLA:
Yoshida, Katsuya, et al. "Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3-Ba2NaNb5O15 piezoceramics by inverse method." IOP PUBLISHING LTD, 2016.

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Last updated on 2018-07-08 at 01:25