Effect of domain structure on the mechanical and piezoelectric properties of lead-free alkali niobate ceramics

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Details zur Publikation

Autor(en): Martin A, Kakimoto KI
Zeitschrift: Japanese Journal of Applied Physics
Verlag: Japan Society of Applied Physics
Jahr der Veröffentlichung: 2014
Band: 53
Heftnummer: 9
ISSN: 0021-4922


Abstract


Load-bearing applications, such as actuators, require sufficient mechanical properties to guarantee long lifetime and reliability. Lead zirconate titanate (PZT) ceramics show relatively low mechanical strength which decreases after applying an electric field. Thus far, evaluations of the mechanical properties have not been the focus in the case of alkali niobate-based (NKN) ceramics. For this purpose, differently poled Li-x(Na0.5K0.5)(1-x)NbO3 ceramics have been observed by means of 3-point bending tests. Best results were achieved with Li0.02Na0.49K0.49NbO3, with a flexural strength of 115 MPa in unpoled state. This value was maximized at a 90 degrees domain switching fraction eta of about 20% to 134 MPa. Other compositions showed similar behavior, which led to the idea that domain switching can be used to enhance the mechanical properties of NKN ceramics. Internal stresses induced via domain reorientation might be the cause of this phenomenon and will be examined in this study. (C) 2014 The Japan Society of Applied Physics



FAU-Autoren / FAU-Herausgeber

Martin, Alexander Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)


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


Zitierweisen

APA:
Martin, A., & Kakimoto, K.-I. (2014). Effect of domain structure on the mechanical and piezoelectric properties of lead-free alkali niobate ceramics. Japanese Journal of Applied Physics, 53(9). https://dx.doi.org/10.7567/JJAP.53.09PB09

MLA:
Martin, Alexander, and Ken-Ichi Kakimoto. "Effect of domain structure on the mechanical and piezoelectric properties of lead-free alkali niobate ceramics." Japanese Journal of Applied Physics 53.9 (2014).

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Zuletzt aktualisiert 2018-10-08 um 09:25