Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications
The sodium (Na) and Ce co-doped calcium bismuth titanate (CBT; CaBi4Ti4O15) Aurivillius ceramics in a Ca1−x(Na0.5Ce0.5)xBi4Ti4O15 (CNCBT; doping content (x) = 0, 0.03, 0.05, 0.08 and 0.12) system were synthesized by the conventional solid-state sintering method. All compositions show a single-phase...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-07-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2023.9220754 |
| _version_ | 1827892958423154688 |
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| author | Zimeng Hu Vladimir Koval Hangfeng Zhang Kan Chen Yajun Yue Dou Zhang Haixue Yan |
| author_facet | Zimeng Hu Vladimir Koval Hangfeng Zhang Kan Chen Yajun Yue Dou Zhang Haixue Yan |
| author_sort | Zimeng Hu |
| collection | DOAJ |
| description | The sodium (Na) and Ce co-doped calcium bismuth titanate (CBT; CaBi4Ti4O15) Aurivillius ceramics in a Ca1−x(Na0.5Ce0.5)xBi4Ti4O15 (CNCBT; doping content (x) = 0, 0.03, 0.05, 0.08 and 0.12) system were synthesized by the conventional solid-state sintering method. All compositions show a single-phase orthorhombic (space group: A21am) structure at room temperature. The shift of the Curie point (TC) towards lower temperatures (T) on doping results from the increased tolerance factor (t). The substitution-enhanced ferroelectric performance with large maximum polarization (Pm) and facilitated domain switching is evidenced by the developed electrical polarization–electric field (P–E) and electrical current–electric field (I–E) hysteresis loops. The piezoelectric coefficient (d33 = 20.5± 0.1 pC/N) of the x = 0.12 sample is about four times larger than that of pure CBT. The improved piezoelectric properties can be attributed to the high remanent polarization (Pr) and relatively high dielectric permittivity (ε′). In addition, multi-sized (micron and sub-micron) domain structures were observed in the CNCBT ceramics by the piezoresponse force microscope (PFM). The multiple-sized ferroelectric domain structure with smaller domains is beneficial to the easy domain switching, enhanced ferroelectric performance, and improved piezoelectric properties of the CNCBT ceramics. The designed Aurivillius-phase ferroelectric ceramics with the TC around 765 ℃ and high piezoelectric coefficient (d33) are suitable for high-temperature piezoelectric applications. |
| first_indexed | 2024-03-12T21:47:24Z |
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| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T21:47:24Z |
| publishDate | 2023-07-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-907abf6bc71f4fd5a957e9efaccf92fb2023-07-26T10:09:29ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082023-07-011271331134410.26599/JAC.2023.9220754Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applicationsZimeng Hu0Vladimir Koval1Hangfeng Zhang2Kan Chen3Yajun Yue4Dou Zhang5Haixue Yan6School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UKInstitute of Materials Research, Slovak Academy of Sciences, Kosice 04001, SlovakiaSchool of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UKSchool of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UKSpallation Neutron Source Science Center, Dongguan 523803, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaSchool of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UKThe sodium (Na) and Ce co-doped calcium bismuth titanate (CBT; CaBi4Ti4O15) Aurivillius ceramics in a Ca1−x(Na0.5Ce0.5)xBi4Ti4O15 (CNCBT; doping content (x) = 0, 0.03, 0.05, 0.08 and 0.12) system were synthesized by the conventional solid-state sintering method. All compositions show a single-phase orthorhombic (space group: A21am) structure at room temperature. The shift of the Curie point (TC) towards lower temperatures (T) on doping results from the increased tolerance factor (t). The substitution-enhanced ferroelectric performance with large maximum polarization (Pm) and facilitated domain switching is evidenced by the developed electrical polarization–electric field (P–E) and electrical current–electric field (I–E) hysteresis loops. The piezoelectric coefficient (d33 = 20.5± 0.1 pC/N) of the x = 0.12 sample is about four times larger than that of pure CBT. The improved piezoelectric properties can be attributed to the high remanent polarization (Pr) and relatively high dielectric permittivity (ε′). In addition, multi-sized (micron and sub-micron) domain structures were observed in the CNCBT ceramics by the piezoresponse force microscope (PFM). The multiple-sized ferroelectric domain structure with smaller domains is beneficial to the easy domain switching, enhanced ferroelectric performance, and improved piezoelectric properties of the CNCBT ceramics. The designed Aurivillius-phase ferroelectric ceramics with the TC around 765 ℃ and high piezoelectric coefficient (d33) are suitable for high-temperature piezoelectric applications.https://www.sciopen.com/article/10.26599/JAC.2023.9220754aurivillius-phase ceramicshigh curie pointdomain switchingpiezoelectric properties |
| spellingShingle | Zimeng Hu Vladimir Koval Hangfeng Zhang Kan Chen Yajun Yue Dou Zhang Haixue Yan Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications Journal of Advanced Ceramics aurivillius-phase ceramics high curie point domain switching piezoelectric properties |
| title | Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications |
| title_full | Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications |
| title_fullStr | Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications |
| title_full_unstemmed | Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications |
| title_short | Enhanced piezoelectricity in Na and Ce co-doped CaBi4Ti4O15 ceramics for high-temperature applications |
| title_sort | enhanced piezoelectricity in na and ce co doped cabi4ti4o15 ceramics for high temperature applications |
| topic | aurivillius-phase ceramics high curie point domain switching piezoelectric properties |
| url | https://www.sciopen.com/article/10.26599/JAC.2023.9220754 |
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