Selvaraj, N.B., Fernandes, M., Reaney, I.M. orcid.org/0000-0003-3893-6544 et al. (5 more authors) (2018) Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy. Materials Characterization, 142. pp. 1-8. ISSN 1044-5803
Abstract
High quality factor and a temperature stable resonant frequency make BaLa 4 Ti 4 O 15 (BLT) ceramics attractive materials for microwave applications. Aiming to exploit the effects of external stresses on the development of textured and anisotropic microstructures to optimise MW properties, the influence of applied external pressure during sintering of BLT ceramics is analysed. HRTEM and geometric phase analysis (GPA) showed that stresses applied during sintering, trigger the nucleation and growth of faults hypothesised to be due to the errors in the AO 3 layer (basal plane) stacking sequence of the hexagonal perovskite structure. The results reveal a strong correlation between the high concentration of structural defects and the development of anisotropic microstructures, which tune the properties of BLT. Stresses applied during sintering are therefore a promising tool to design material properties.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2018 Elsevier. This is an author produced version of a paper subsequently published in Materials Characterization. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Stress; Sintering; Barium lanthanum titanate; High resolution transmission electron microscopy; Microstructure; Geometric phase analysis |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Jun 2018 13:30 |
Last Modified: | 01 May 2019 00:39 |
Published Version: | https://doi.org/10.1016/j.matchar.2018.04.054 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.matchar.2018.04.054 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131666 |