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Reduced leakage current and excellent thermal stability in lead-free BiFeO3–BaTiO3-based piezoelectric ceramics.

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Title: Reduced leakage current and excellent thermal stability in lead-free BiFeO3–BaTiO3-based piezoelectric ceramics.
Authors: Bai, Xudong1 (AUTHOR), Pan, Yongqi1 (AUTHOR), Xia, Zhichao1 (AUTHOR), He, Caiwang1 (AUTHOR), Li, Guannan1 (AUTHOR), Chen, Yi1 (AUTHOR) mrchenyi@swu.edu.cn
Source: Journal of Materials Science: Materials in Electronics. Mar2022, Vol. 33 Issue 7, p3949-3964. 16p.
Subjects: Stray currents, Thermal stability, Piezoelectric ceramics, Electric currents, Electric fields, Curie temperature
Abstract: It is extremely difficult to completely pole BiFeO3–BaTiO3 ceramics, due to the large leakage current under an electric field. In the present work, Ga and MnO2 were added into 0.7BiFO3–0.3BaTiO3 in order to decrease the leakage current, forming new solid solutions with the general formula of 0.7Bi1+xFe0.98Ga0.02O3–0.3BaTiO3 + ywt%MnO2. Additionally, excess Bi was incorporated into the ceramics to compensate for the volatilization of Bi during high-temperature processes. It was found that both-Bi-excess and MnO2 doping could reduce the leakage current as long as they were maintained at a suitable amount. A combination of strong piezoelectric activity (d33 = 167 pC/N) and a high Curie temperature (TC = 502 °C) was achieved in the ceramics with x = 0.05, y = 0.1. Moreover, the piezoelectric properties of the ceramics exhibited superior thermal stability, reflected in the fact that their d33 decreased by only 25%, from room temperature up to 450 °C. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Science: Materials in Electronics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Reduced leakage current and excellent thermal stability in lead-free BiFeO<subscript>3</subscript>–BaTiO<subscript>3</subscript>-based piezoelectric ceramics.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Science%3A+Materials+in+Electronics%22">Journal of Materials Science: Materials in Electronics</searchLink>. Mar2022, Vol. 33 Issue 7, p3949-3964. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Stray+currents%22">Stray currents</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Piezoelectric+ceramics%22">Piezoelectric ceramics</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+currents%22">Electric currents</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+fields%22">Electric fields</searchLink><br /><searchLink fieldCode="DE" term="%22Curie+temperature%22">Curie temperature</searchLink>
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  Data: It is extremely difficult to completely pole BiFeO3–BaTiO3 ceramics, due to the large leakage current under an electric field. In the present work, Ga and MnO2 were added into 0.7BiFO3–0.3BaTiO3 in order to decrease the leakage current, forming new solid solutions with the general formula of 0.7Bi1+xFe0.98Ga0.02O3–0.3BaTiO3 + ywt%MnO2. Additionally, excess Bi was incorporated into the ceramics to compensate for the volatilization of Bi during high-temperature processes. It was found that both-Bi-excess and MnO2 doping could reduce the leakage current as long as they were maintained at a suitable amount. A combination of strong piezoelectric activity (d33 = 167 pC/N) and a high Curie temperature (TC = 502 °C) was achieved in the ceramics with x = 0.05, y = 0.1. Moreover, the piezoelectric properties of the ceramics exhibited superior thermal stability, reflected in the fact that their d33 decreased by only 25%, from room temperature up to 450 °C. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Materials Science: Materials in Electronics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Text: English
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      – TitleFull: Reduced leakage current and excellent thermal stability in lead-free BiFeO3–BaTiO3-based piezoelectric ceramics.
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            NameFull: Bai, Xudong
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            NameFull: He, Caiwang
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              Text: Mar2022
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