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

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Yoshida K, Kakimoto K, Weiß M, Rupitsch S, Lerch R
Zeitschrift: Japanese Journal of Applied Physics
Verlag: Japan Society of Applied Physics
Jahr der Veröffentlichung: 2016
Band: 55
Heftnummer: 10S
ISSN: 0021-4922
Sprache: Englisch


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).



FAU-Autoren / FAU-Herausgeber

Kakimoto, Kenichi Prof.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Lerch, Reinhard Prof. Dr.-Ing.
Lehrstuhl für Sensorik
Rupitsch, Stefan PD Dr.
Lehrstuhl für Sensorik
Weiß, Manuel
Lehrstuhl für Sensorik


Autor(en) der externen Einrichtung(en)
Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku


Zitierweisen

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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