Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3–Ba2NaNb5O15 piezoceramics by inverse method
Yoshida K, Kakimoto K, Weiß M, Rupitsch S, Lerch R (2016)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2016
Journal
Publisher: Japan Society of Applied Physics
Book Volume: 55
Article Number: 10TD02
Journal Issue: 10S
URI: http://iopscience.iop.org/article/10.7567/JJAP.55.10TD02/pdf
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)-NbO3–0.015Ba2NaNb5O15 (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 °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).
Authors with CRIS profile
Kenichi Kakimoto
Lehrstuhl für Glas und Keramik
Manuel Weiß
Lehrstuhl für Autonome Systeme und Mechatronik
Stefan Rupitsch
Lehrstuhl für Autonome Systeme und Mechatronik
Reinhard Lerch
Lehrstuhl für Autonome Systeme und Mechatronik
Involved external institutions
Japan (JP)How to cite
APA:
Yoshida, K., Kakimoto, K., 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. Japanese Journal of Applied Physics, 55(10S).
MLA:
Yoshida, Katsuya, et al. "Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3–Ba2NaNb5O15 piezoceramics by inverse method." Japanese Journal of Applied Physics 55.10S (2016).
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