Synthesis and Size Control of Tetragonal Barium Titanate Nanopowders by Facile Solvothermal Method
A facile synthetic strategy was implemented to obtain nanosized barium titanate (
3) powders with tetragonal structure. The nanoparticles were synthesized using solvothermal process employing diethanolamine and triethanolamine
to suppress the particle growth and the as‐prepared nanopowders were characterized using X‐ray diffraction, scanning electron microscopy, and high‐resolution dispersive BaTiO Raman spectroscopy. It was found that the particle size can be easily tuned by
adjusting the experimental parameters while retaining the tetragonality. The average diameters of the particles prepared with and without the organic amines were found to be 80 and 100 nm, respectively. All the synthesized 3 nanopowders
exhibit a narrow size distribution with a uniform morphology. Rietveld refinement of the BaTiO XRD patterns and Raman spectra revealed that the synthesized 3 nanopowders have tetragonal asymmetry dominant structures.
A slight decrease in the tetragonality of the prepared powders with decrease in particle size is attributed to the presence of cubic shell layer and inner defects. The tetragonal‐dominant structure was also confirmed by normalizing the peak area of the Raman spectra.
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Document Type: Research Article
Publication date: 2012-08-01