Maliha Siddiqui, Daniel Valášek, Yang Bai, David Salamon, Phase transformation of cold-sintered doped barium titanate ceramics during the post-annealing process, Open Ceramics, Volume 15, 2023, 100401, ISSN 2666-5395, https://doi.org/10.1016/j.oceram.2023.100401
Phase transformation of cold-sintered doped barium titanate ceramics during the post-annealing process
|Author:||Siddiqui, Maliha1; Valášek, Daniel1; Bai, Yang2;|
1Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00, Brno, Czech Republic
2Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, FI-90014, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 7.1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023070583564
|Publish Date:|| 2023-07-05
The cold sintering technique has been developed to densify electroceramics at significantly low temperatures to tackle high energy consumption as well as compatibility of electroceramic components in modern electronics. However, obstacles still exist since, to obtain desired electrical properties, a post-annealing procedure at elevated temperatures must follow to trigger compulsory phase formation and/or grain growth. This work investigates the BaTiO₃ and (Ba,Sr)TiO₃ ceramics via both the cold and conventional sintering routes, and then compares their phase transformation behaviors during the post-annealing process. Results suggest that, given similar particle and grain sizes, the cold-sintered ceramics tend to retain a substantial part of the pristine tetragonal phase at annealing temperatures of <800 °C, while the cubic phase tends to dominate when annealed at >800 °C. This indicates a process-stimulated phase transformation that may guide or limit the selection of annealing temperature in practice.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
The authors are grateful to the JECS Trust for funding [the visit of Maliha Siddiqui to Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Finland] (contract number 2021285). In addition, Czech Nano Lab project LM2018110 funded by MEYS CR is also gratefully acknowledged for the financial support of the measurements/sample fabrication at CEITEC Nano Research Infrastructure. Maliha Siddiqui also grateful to VUT for funding this work by specific research grant project CEITEC VUT-J-22-7838. Yang Bai acknowledges the Centre for Material Analysis, University of Oulu for the use and technical support of the characterization equipment and facilities, as well as the Infotech Institute of University of Oulu for the financial and strategic support.
© 2023 Published by Elsevier Ltd on behalf of European Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).