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Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1−xTixO3 Piezoceramics

Pan, Zhao and Zhang, Mao-Hua and Nishikubo, Takumi and Sakai, Yuki and Yamamoto, Hajime and Hojo, Hajime and Fukuda, Masayuki and Hu, Lei and Ishizaki, Hayato and Kaneko, Satoru and Kawaguchi, Shogo and Koruza, Jurij and Rödel, Jürgen and Azuma, Masaki (2021):
Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1−xTixO3 Piezoceramics.
In: ACS Applied Materials & Interfaces, 13 (4), pp. 5208-5215. ACS Publications, ISSN 1944-8244,
DOI: 10.1021/acsami.0c18482,
[Article]

Abstract

In this work, we show that polarization rotation enhances the piezoresponse in a high-performance lead-free piezoelectric material, Na1/2Bi1/2V1−xTixO3, a solid solution between tetragonal Na1/2Bi1/2VO3 and rhombohedral Na1/2Bi1/2TiO3, obtained by high-pressure synthesis. The system forms a pure perovskite structure with a favorable morphotropic phase boundary (MPB) located around x = 0.90, which separates the tetragonal and rhombohedral phases. In addition, a distinct monoclinic phase with polarization rotation as functions of composition and temperature is observed. XRD measurements revealed the moderately high Curie temperature of 523 K at x = 0.95 in the MPB. The piezoelectric coefficient d33 of the monoclinic x = 0.95 sample, 42 pC/N, is higher than those of the tetragonal and rhombohedral phases. Even though the present lead-free Na1/2Bi1/2V1−xTixO3 ceramics feature smaller d33 values compared to many currently available lead-free piezoelectric materials as a result of insufficient poling and low density, we expect our findings open up opportunities for exploring promising lead-free piezoelectric materials in Na1/2Bi1/2VO3-based perovskites.

Item Type: Article
Erschienen: 2021
Creators: Pan, Zhao and Zhang, Mao-Hua and Nishikubo, Takumi and Sakai, Yuki and Yamamoto, Hajime and Hojo, Hajime and Fukuda, Masayuki and Hu, Lei and Ishizaki, Hayato and Kaneko, Satoru and Kawaguchi, Shogo and Koruza, Jurij and Rödel, Jürgen and Azuma, Masaki
Title: Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1−xTixO3 Piezoceramics
Language: English
Abstract:

In this work, we show that polarization rotation enhances the piezoresponse in a high-performance lead-free piezoelectric material, Na1/2Bi1/2V1−xTixO3, a solid solution between tetragonal Na1/2Bi1/2VO3 and rhombohedral Na1/2Bi1/2TiO3, obtained by high-pressure synthesis. The system forms a pure perovskite structure with a favorable morphotropic phase boundary (MPB) located around x = 0.90, which separates the tetragonal and rhombohedral phases. In addition, a distinct monoclinic phase with polarization rotation as functions of composition and temperature is observed. XRD measurements revealed the moderately high Curie temperature of 523 K at x = 0.95 in the MPB. The piezoelectric coefficient d33 of the monoclinic x = 0.95 sample, 42 pC/N, is higher than those of the tetragonal and rhombohedral phases. Even though the present lead-free Na1/2Bi1/2V1−xTixO3 ceramics feature smaller d33 values compared to many currently available lead-free piezoelectric materials as a result of insufficient poling and low density, we expect our findings open up opportunities for exploring promising lead-free piezoelectric materials in Na1/2Bi1/2VO3-based perovskites.

Journal or Publication Title: ACS Applied Materials & Interfaces
Journal volume: 13
Number: 4
Publisher: ACS Publications
Uncontrolled Keywords: Lead-free, perovskite, polarization rotation, piezoelectric, ferroelectricity
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
LOEWE
LOEWE > LOEWE-Schwerpunkte
LOEWE > LOEWE-Schwerpunkte > FLAME - Fermi Level Engineering Antiferroelektrischer Materialien für Energiespeicher und Isolatoren
Date Deposited: 18 Feb 2021 07:35
DOI: 10.1021/acsami.0c18482
Official URL: https://pubs.acs.org/doi/10.1021/acsami.0c18482
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