Synthesis of Monodispersed Barium Titanate Nanoparticles with Narrow Size Distribution by a Modified Alkoxide‐Hydroxide Sol‐Precipitation Method

Abstract

A modified alkoxide‐hydroxide sol‐precipitation method, combining the sol–gel method and hydrothermal method, has been developed to synthesize monodispersed barium titanate with narrow size distributions. The key point of this method is the synthesis of ultrafine titanium hydroxide precipitate precursor by controlling the hydrolysis of Ti(OC4H9)4, where acetic acid and polyethyleneglycol were used to control the process. The as‐prepared precursor and BaTiO3 nanoparticles were characterized by X‐ray diffraction, transmission electron microscopy, high‐resolution, BET specific surface area measurement, and scanning electron microscope. The monodispersed BaTiO3 nanoparticles obtained by this method have an average size below 100 nm with a narrow size distribution.

Fabrication of Monodispersed 5‐nm BaTiO3 Nanocrystals with Narrow Size Distribution via One‐Step Solvothermal Route

“…The crystallite size decreases with decreasing of concentration, which indicates that DEG plays an important role in controlling the particle size besides as solvent. The similar results with the using of PEG have been reported, which suggested the PEG helped controlling the hydrolysis process and the initial particle size . Further study on refining the lattice constant from XRD patterns shows that the c / a ratio is 1.0069 ± 0.0010; here, the margin should come from the splitting peaks fitting process, as the experimental data cannot be expressed as the summary of the two peaks without any errors.…”

Calcination Effect on Structural Trasformation of Barium Titanite Ferroelectric Ceramic by Sol Gel Method

“…It directly corresponds to the planes of (100), (110), (111), (200), (210), (211) and (220), respectively. The results indicate that the sol-gel synthesized BaTiO3 powders exhibit a perovskite structure as per literature reports [10,12]. The XRD pattern shows that the peak of the BaTiO3 narrowed as the calcination temperature increased, in which the BaTiO3 calcined at 1100°C has the highest peak intensity to all planes as compared to other samples.…”

“…Therefore, extensive research efforts have been focused on producing high-quality barium titanate by several methods, including sol-gel, radio frequency sputtering, electrochemical, hydrothermal, and Pulsed Laser Deposition methods [6 -9]. Amongst all, the sol-gel technique is the most favourable technique due to its low cost, simple chemical composition, low processing temperature and capable of producing highly crystalline BaTiO3 nanoparticles [10,11].…”

Magnetic and nonlinear optical properties of BaTiO3 nanoparticles

“…BTO nanoparticles of various sizes were prepared using sol-gel method, [29][30][31] by taking barium acetate and titanium isopropoxide as precursor chemicals. The BTO nanoparticles of different sizes were obtained by calcining the dried sol at 650 o C-800 o C temperature range for 1hr.…”