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Phase Transformation of Metastable ZnSnO3 Upon Thermal Decomposition by In-Situ Temperature-Dependent Raman Spectroscopy
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0002-0074-3504
2015 (English)In: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916Article in journal (Refereed) Published
Abstract [en]

Temperature-dependent in-situ Raman spectroscopy is used to investigate the phase transformation of zinc metastannate (ZnSnO<inf>3</inf>) to zinc orthostannate (Zn<inf>2</inf>SnO<inf>4</inf>) induced upon annealing in the ambient. ZnSnO<inf>3</inf> microcubes (MCs) were synthesized at room temperature using a simple aqueous synthesis process, followed by characterization using electron microscopy, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA). Annealing of the ZnSnO<inf>3</inf> MCs was carried out up to 1000°C, while recording the Raman spectra in-situ at regular intervals. Phase transformation from metastannate to orthostannate was found to begin around 500°C with an activation energy of ~0.965 eV followed by the recrystallization into the inverse spinel orthostannate phase at ~750°C. Results from this study provide detailed understanding of the phase transformation behavior of perovskite ZnSnO<inf>3</inf> to inverse spinel Zn<inf>2</inf>SnO<inf>4</inf> upon thermal annealing.

Place, publisher, year, edition, pages
2015.
Keyword [en]
Activation energy, Annealing, Decomposition, Phase transitions, Raman spectroscopy, Thermogravimetric analysis, X ray diffraction, Zinc, Aqueous synthesis, In-situ Raman spectroscopy, In-situ temperature, Inverse spinel, Phase transformation behavior, Room temperature, Temperature dependent, Thermal-annealing, Fourier transform infrared spectroscopy
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Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-175635DOI: 10.1111/jace.13791ISI: 000368076500067Scopus ID: 2-s2.0-84955358789OAI: oai:DiVA.org:kth-175635DiVA: diva2:865260
Note

QC 20151027

Available from: 2015-10-27 Created: 2015-10-19 Last updated: 2017-12-01Bibliographically approved

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Dutta, Joydeep

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