Microscopic evaluation of charged domain wall structure in niobium-based piezoceramics

Urushihara D, Kobayashi R, Martin A, Asaka T, Webber KG, Kakimoto KI (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 125

Article Number: 192904

Journal Issue: 19

DOI: 10.1063/5.0228587

Abstract

In this study, we investigated the charged domain wall structure of lead-free piezoceramics (Na0.55K0.45)NbO3 using multiple microscopy techniques. It was found that the oxygen partial pressure during sintering affected the volatilization of A2O (A = Na, K), whereby the resulting vacancies were found to be related to grain sizes. In the polycrystals sintered under the air atmosphere condition, almost all grains show rapid grain growth and complex domain structures containing striped and indefinite shaped domains as revealed by confocal laser microscope and piezoelectric force microscope images. Transmission electron microscopy showed that a part of these domain structures has charged domain walls due to bending the 180° domain walls. The A-site vacancies, such as Na and K, lead to forming large grains and charged domain wall structures.

Authors with CRIS profile

Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Additional Organisation(s)

Graduiertenkolleg 2495/2 - Energiekonvertierungssysteme: von Materialien zu Bauteilen

Involved external institutions

Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku JP Japan (JP)

How to cite

APA:

Urushihara, D., Kobayashi, R., Martin, A., Asaka, T., Webber, K.G., & Kakimoto, K.I. (2024). Microscopic evaluation of charged domain wall structure in niobium-based piezoceramics. Applied Physics Letters, 125(19). https://doi.org/10.1063/5.0228587

MLA:

Urushihara, Daisuke, et al. "Microscopic evaluation of charged domain wall structure in niobium-based piezoceramics." Applied Physics Letters 125.19 (2024).

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