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Na1/2Bi1/2VO3 and K1/2Bi1/2VO3: New Lead-Free Tetragonal Perovskites with Moderate c/a Ratios

Yamamoto, Hajime and Ogata, Takahiro and Patel, Satyanarayan and Koruza, Jurij and Rödel, Jürgen and Paul, Atanu and Saha-Dasgupta, Tansuri and Itoh, Mitsuru and Azuma, Masaki (2018):
Na1/2Bi1/2VO3 and K1/2Bi1/2VO3: New Lead-Free Tetragonal Perovskites with Moderate c/a Ratios.
2018, In: Chemistry of Materials, (30), pp. 6728-6736. American Chemical Society, ISSN 0897-4756,
DOI: 10.1021/acs.chemmater.8b02379,
[Article]

Abstract

New lead-free tetragonal perovskites Na1/2Bi1/2VO3 and K1/2Bi1/2VO3 were synthesized under high pressure (6 GPa) and high temperature (1473 K), based on the design of materials optimizing the lone pair effect of the A-site ion and utilizing the Jahn−Teller effect in the B-siteV4+. The magnitudes of the c/a ratio and spontaneous polarization, PS, were 1.085 and 108 μC/cm2, respectively (73 μC/cm2 by the point charge model), for Na1/2Bi1/2VO3 and 1.054 and 92 μC/cm2, respectively (56 μC/cm2 by the point charge model), for K1/2Bi1/2VO3, which are comparable to the well-known lead-based ferroelectric PbTiO3. This approach can guide the design of new lead-free ferroelectric and piezoelectric materials.

Item Type: Article
Erschienen: 2018
Creators: Yamamoto, Hajime and Ogata, Takahiro and Patel, Satyanarayan and Koruza, Jurij and Rödel, Jürgen and Paul, Atanu and Saha-Dasgupta, Tansuri and Itoh, Mitsuru and Azuma, Masaki
Title: Na1/2Bi1/2VO3 and K1/2Bi1/2VO3: New Lead-Free Tetragonal Perovskites with Moderate c/a Ratios
Language: English
Abstract:

New lead-free tetragonal perovskites Na1/2Bi1/2VO3 and K1/2Bi1/2VO3 were synthesized under high pressure (6 GPa) and high temperature (1473 K), based on the design of materials optimizing the lone pair effect of the A-site ion and utilizing the Jahn−Teller effect in the B-siteV4+. The magnitudes of the c/a ratio and spontaneous polarization, PS, were 1.085 and 108 μC/cm2, respectively (73 μC/cm2 by the point charge model), for Na1/2Bi1/2VO3 and 1.054 and 92 μC/cm2, respectively (56 μC/cm2 by the point charge model), for K1/2Bi1/2VO3, which are comparable to the well-known lead-based ferroelectric PbTiO3. This approach can guide the design of new lead-free ferroelectric and piezoelectric materials.

Journal or Publication Title: Chemistry of Materials
Volume: 2018
Number: 30
Publisher: American Chemical Society
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
Date Deposited: 17 Oct 2018 10:39
DOI: 10.1021/acs.chemmater.8b02379
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