Synthesis and Characterization of Barium Strontium Titanate Nanocrystalline Powders Prepared by Direct Reactive Precipitation Method from Solution

Abstract:

Barium strontium titanate nano powders were prepared by mixing ethanol solution of tetrabutyl titanate with an aqueous solution of Ba(OH)₂•8H₂O and Sr(OH)₂•8H₂O with a certain molar ratio of barium to strontium at 40°C－95°C. The products were characterized by thermogravimetry (TG), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), transmission electron microscope (TEM) and atomic force microscopy (AFM). The results show that the powders prepared with the reactant concentration of 0.8M are spherical in particle shape with the grain size of 50nm－65nm. When the annealing temperature of the powders is higher than 906°C, the hydroxyl groups existed in barium strontium titanate lattice are removed. XRD analysis demonstrate that the as-prepared powders are cubic phase. All the diffraction peaks are shifted towards higher diffraction angles and the lattice parameter a calculated decreases linearly with serial decrease of the molar ratio of barium to strontium.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2301-2306
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2301
• Online since: January 2013
• Authors: Qi An Zhu, Yao Wu, Xu Feng Sun, Xian Tan, Kai Zhan, Jin Hui Cai
• Keywords: Barium Strontium Titanate, Dielectric Material, Growth from Solution, Nanomaterial

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