Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties
Sintering for large-sized, stoichiometric Bi0.5Na0.5TiO3 (BNT) ceramics is of great challenge due to the loss of volatile Bi/Na at A-site of perovskite structure. In this work, BNT ceramic tile with the size of ∼10 × 10 cm2 and near-stoichiometric composition has been successfully fabricated by Isob...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/178298 |
| _version_ | 1811680384389218304 |
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| author | Guo, Huilu Zhu, Minmin Zhao, Yida Du, Zehui |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Guo, Huilu Zhu, Minmin Zhao, Yida Du, Zehui |
| author_sort | Guo, Huilu |
| collection | NTU |
| description | Sintering for large-sized, stoichiometric Bi0.5Na0.5TiO3 (BNT) ceramics is of great challenge due to the loss of volatile Bi/Na at A-site of perovskite structure. In this work, BNT ceramic tile with the size of ∼10 × 10 cm2 and near-stoichiometric composition has been successfully fabricated by Isobam-assisted gelcasting process, followed by sintering with 1150°C calcined power bed. The powder bed used and sintering duration were found to have a great influence on the formation of the Na-deficient phase (Bi4.5Na0.5Ti4O15) in the ceramics, and the strategies to eliminate it have been explored. The obtained ceramics exhibit a dielectric constant/loss of 673.6/0.039 at 1 kHz, as well as an electrostrictive strain of ∼0.07% which corresponds to a converse piezoelectric constant (Formula presented.) of 105.2 pm/V. Our work thus provides an effective approach to prepare large-sized and stoichiometric BNT ceramics. |
| first_indexed | 2024-10-01T03:24:12Z |
| format | Journal Article |
| id | ntu-10356/178298 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:24:12Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1782982024-06-11T02:25:24Z Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties Guo, Huilu Zhu, Minmin Zhao, Yida Du, Zehui School of Materials Science and Engineering Engineering Dielectric Electrostriction Sintering for large-sized, stoichiometric Bi0.5Na0.5TiO3 (BNT) ceramics is of great challenge due to the loss of volatile Bi/Na at A-site of perovskite structure. In this work, BNT ceramic tile with the size of ∼10 × 10 cm2 and near-stoichiometric composition has been successfully fabricated by Isobam-assisted gelcasting process, followed by sintering with 1150°C calcined power bed. The powder bed used and sintering duration were found to have a great influence on the formation of the Na-deficient phase (Bi4.5Na0.5Ti4O15) in the ceramics, and the strategies to eliminate it have been explored. The obtained ceramics exhibit a dielectric constant/loss of 673.6/0.039 at 1 kHz, as well as an electrostrictive strain of ∼0.07% which corresponds to a converse piezoelectric constant (Formula presented.) of 105.2 pm/V. Our work thus provides an effective approach to prepare large-sized and stoichiometric BNT ceramics. The authors gratefully acknowledge the support from Fujian Provincial Science and Technology Planning Project (No. 2022I0006). 2024-06-11T02:25:24Z 2024-06-11T02:25:24Z 2024 Journal Article Guo, H., Zhu, M., Zhao, Y. & Du, Z. (2024). Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties. Journal of the American Ceramic Society, 107(6), 4086-4095. https://dx.doi.org/10.1111/jace.19701 0002-7820 https://hdl.handle.net/10356/178298 10.1111/jace.19701 2-s2.0-85183864711 6 107 4086 4095 en Journal of the American Ceramic Society © 2024 The American Ceramic Society. All rights reserved. |
| spellingShingle | Engineering Dielectric Electrostriction Guo, Huilu Zhu, Minmin Zhao, Yida Du, Zehui Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties |
| title | Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties |
| title_full | Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties |
| title_fullStr | Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties |
| title_full_unstemmed | Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties |
| title_short | Sintering of large-sized and near-stoichiometric BNT ceramics with enhanced dielectric and electrostrictive properties |
| title_sort | sintering of large sized and near stoichiometric bnt ceramics with enhanced dielectric and electrostrictive properties |
| topic | Engineering Dielectric Electrostriction |
| url | https://hdl.handle.net/10356/178298 |
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