Rendón-Angeles, JC, Matamoros-Veloza, Z, Matamoros Veloza, A et al. (3 more authors) (2017) Facile Synthesis of Perovskite-Structured Powders Using Barite–Celestite Ore under Hydrothermal Alkaline Conditions. Industrial & Engineering Chemistry Research, 56 (36). pp. 9942-9952. ISSN 0888-5885
Abstract
Barite–celestite (BC) crystals were treated in highly concentrated alkaline hydrothermal fluid (5 M KOH) coexisting with a Ti(OH)₄·4.5H₂O gel to produce SrTiO₃ particles between 150 and 250 °C for several intervals between 6 h and 96 h. The BC transformation was initiated at a lower temperature (150 °C) and the total precursors consumption was completed at 250 °C for 96 h, resulting only in the crystallization of SrTiO₃ particles. Different temperatures of reaction (≤200 °C) lead to variations in morphology and particle size of the SrTiO₃ . The crystal growth of faceted cubic agglomerates was achieved at 250 °C, and it is provoked by the Oswald ripening mechanism. The release of barium to the hydrothermal fluid from the precursor occurred simultaneously with the transformation process. A low value of activation energy required for the single-step transformation of the BC plates into SrTiO₃ particles was observed (26.33 kJ mol‾¹), under static hydrothermal conditions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Chemical Society. This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Industrial & Engineering Chemistry Research, copyright © American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acs.iecr.7b02383. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Sep 2017 10:25 |
Last Modified: | 21 Aug 2018 00:38 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.iecr.7b02383 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:120914 |