Journal article
(Original article)


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


Publication Details
Author(s): Yoshida K, Kakimoto K, Weiß M, Rupitsch S, Lerch R
Publisher: Japan Society of Applied Physics
Publication year: 2016
Volume: 55
Journal issue: 10S
ISSN: 0021-4922
Language: English

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).



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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