Negative Thermal Expansion in Lead-Free La-Substituted Bi0.5Na0.5VO3

Hayato Ishizaki; Yuki Sakai; Takumi Nishikubo; Zhao Pan; Kengo Oka; Hajime Yamamoto; Masaki Azuma

doi:10.1021/acs.chemmater.0c01709

Negative Thermal Expansion in Lead-Free La-Substituted Bi_0.5Na_0.5VO₃

Hayato Ishizaki, Yuki Sakai, Takumi Nishikubo, Zhao Pan, Kengo Oka, Hajime Yamamoto, Masaki Azuma

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Research output: Contribution to journal › Article › peer-review

Abstract

Negative thermal expansion (NTE) materials, which shrink upon heating, are required in modern technologies. In this study, new lead-free NTE compounds were obtained by substitution of La in PbTiO3 (PT)-type compounds, Bi0.5Na0.5VO3. Decreasing the stereochemical activity by substitution of La for Bi3+ and electron doping by substitution of La for Na+ were found to destabilize the tetragonal phase and cause a temperature-induced transition to a small cubic phase accompanied by NTE. The temperature hysteresis was suppressed because the phase transition was second order-like.

Original language	English
Pages (from-to)	4832-4837
Number of pages	6
Journal	Chemistry of Materials
Volume	32
Issue number	11
DOIs	https://doi.org/10.1021/acs.chemmater.0c01709
Publication status	Published - 2020 Jun 9

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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@article{21326890a260462ebf87c36d80a6e30b,

title = "Negative Thermal Expansion in Lead-Free La-Substituted Bi0.5Na0.5VO3",

abstract = "Negative thermal expansion (NTE) materials, which shrink upon heating, are required in modern technologies. In this study, new lead-free NTE compounds were obtained by substitution of La in PbTiO3 (PT)-type compounds, Bi0.5Na0.5VO3. Decreasing the stereochemical activity by substitution of La for Bi3+ and electron doping by substitution of La for Na+ were found to destabilize the tetragonal phase and cause a temperature-induced transition to a small cubic phase accompanied by NTE. The temperature hysteresis was suppressed because the phase transition was second order-like.",

author = "Hayato Ishizaki and Yuki Sakai and Takumi Nishikubo and Zhao Pan and Kengo Oka and Hajime Yamamoto and Masaki Azuma",

note = "Funding Information: This work was partially supported by Grants-in-Aid for Scientific Research, 18H05208 and 19H05625, from the Japan Society for the Promotion of Science (JSPS) and by Kanagawa Institute of Industrial Science and Technology. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (2018B1222, 2018B1860, 2019A1045, and 2019A1688). Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = jun,

day = "9",

doi = "10.1021/acs.chemmater.0c01709",

language = "English",

volume = "32",

pages = "4832--4837",

journal = "Chemistry of Materials",

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publisher = "American Chemical Society",

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T1 - Negative Thermal Expansion in Lead-Free La-Substituted Bi0.5Na0.5VO3

AU - Ishizaki, Hayato

AU - Sakai, Yuki

AU - Nishikubo, Takumi

AU - Pan, Zhao

AU - Oka, Kengo

AU - Yamamoto, Hajime

AU - Azuma, Masaki

N1 - Funding Information: This work was partially supported by Grants-in-Aid for Scientific Research, 18H05208 and 19H05625, from the Japan Society for the Promotion of Science (JSPS) and by Kanagawa Institute of Industrial Science and Technology. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (2018B1222, 2018B1860, 2019A1045, and 2019A1688). Publisher Copyright: Copyright © 2020 American Chemical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/6/9

Y1 - 2020/6/9

N2 - Negative thermal expansion (NTE) materials, which shrink upon heating, are required in modern technologies. In this study, new lead-free NTE compounds were obtained by substitution of La in PbTiO3 (PT)-type compounds, Bi0.5Na0.5VO3. Decreasing the stereochemical activity by substitution of La for Bi3+ and electron doping by substitution of La for Na+ were found to destabilize the tetragonal phase and cause a temperature-induced transition to a small cubic phase accompanied by NTE. The temperature hysteresis was suppressed because the phase transition was second order-like.

AB - Negative thermal expansion (NTE) materials, which shrink upon heating, are required in modern technologies. In this study, new lead-free NTE compounds were obtained by substitution of La in PbTiO3 (PT)-type compounds, Bi0.5Na0.5VO3. Decreasing the stereochemical activity by substitution of La for Bi3+ and electron doping by substitution of La for Na+ were found to destabilize the tetragonal phase and cause a temperature-induced transition to a small cubic phase accompanied by NTE. The temperature hysteresis was suppressed because the phase transition was second order-like.

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