Development of 0.8Pb(Zr0.48Ti0.52)O3–0.2Pb [(Zn1/3Nb2/3)0.625(Mn1/3Nb2/3)0.375]O3 Ceramics for High-Intensity Ultrasound Applications

Autor: Tran Dai Hieu, Phan Dinh Gio, Tran Phuong Nam, Le Dai Vuong, Nguyen Duc Vinh Quang
Rok vydání: 2018
Předmět:
Zdroj: Journal of Electronic Materials. 47:5944-5951
ISSN: 1543-186X
0361-5235
DOI: 10.1007/s11664-018-6454-8
Popis: The B-site oxide mixing technique has been used to fabricate 0.8Pb(Zr0.48 Ti0.52)O3–0.2Pb[(Zn1/3Nb2/3)0.625(Mn1/3Nb2/3)0.375]O3 (PZT–PZMnN) + x wt.% ZnO nanoparticle ceramics, where x = 0.0, 0.20, 0.25, 0.30, 0.35, 0.40, and 0.45. The perovskite PZT–PZMnN + x wt.% ZnO solid solution was sintered at 950°C. Presence of tetragonal and rhombohedral phases in the sintered PZT–PZMnN + 0.35 wt.% ZnO compound at room temperature was confirmed by simultaneously investigating the structure, microstructure, and dielectric properties. The largest grain size was exhibited by the PZT–PZMnN + 0.35 wt.% ZnO nanoparticle ceramic near the morphotropic phase boundary. For this composition, small rhombohedral domains with 71° or 108° domain walls were observed around relatively large tetragonal domains with 180° and 90° domain walls. The width of these domains was found to be about 100 nm. The PZT–PZMnN ceramics exhibited the following optimal properties at this ZnO nanoparticle content of 0.35 wt.%: electromechanical coupling factors of kp of 0.60 and kt of 0.46, piezoelectric constant d31 of 130 pC N−1, mechanical quality factor Qm of 1280, high remanent polarization Pr of 30.4 μC cm−2, and low coercive field Ec of 6.2 kV cm−1, making it a promising material for use in high-intensity ultrasound applications.
Databáze: OpenAIRE
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