Cubic phase stabilization of Barium titanate nanorods by rapid quenching technique

Stabilization of high temperature cubic phase of BaTiO3 at room temperature is established by rapid quenching of the surfactant assisted sonochemically synthesized BaTiO3 after calcination for 2h at 800°C. The quenched BaTiO3 is stabilized to cubic phase at room temperature in contrast to the BaTiO3...

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Bibliographic Details
Published in:Materials letters 2017-01, Vol.186, p.305-307
Main Authors: Loganathan, Aswaghosh, Manoharan, Divinah, Nesamony, Victor Jaya
Format: Article
Language:English
Subjects:
Accessibility
Aspect ratio
Barium titanate nanorod
Barium titanates
Cooling rate
Heat treatment
High temperature
Materials science
Nanorods
Phase transformation
Phase transitions
Quenching
Quenching (cooling)
Raman
Rapid quenching (metallurgy)
Sonochemical method
Stabilization
Studies
Titanium
Windows (intervals)
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Summary:Stabilization of high temperature cubic phase of BaTiO3 at room temperature is established by rapid quenching of the surfactant assisted sonochemically synthesized BaTiO3 after calcination for 2h at 800°C. The quenched BaTiO3 is stabilized to cubic phase at room temperature in contrast to the BaTiO3 obtained by normal cooling at a rate of 1°C/min, which exists in the tetragonal phase at room temperature. BaTiO3 prepared by the same synthetic procedure but two different heat treatment methods possesses almost similar morphology (i.e.) 1-dimensional nanorod structure but with different aspect ratio. Quenching prevents the low temperature phase transformation c→t from occurring by providing a narrow window of time in which the reaction is both thermodynamically favourable and kinetically accessible. •BaTiO3 nanorods were prepared by surfactant assisted sonochemical method.•Stabilization of c-BaTiO3 at room temperature via rapid quenching technique.•Cooling rate is an important criterion for room temperature phase stabilization.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.10.048