Structural Differences of BaTiO3 Ceramics Modified by Ultrasonic and Mechanochemical Methods

摘要： Barium titanate powders were synthesized by the modified solid-state method with ultrasonic (5 min) and mechanochemical (12 h) deagglomeration methods. The structure of the samples was verified using Fourier transform infrared spectroscopy (FT-IR) and X-ray diffractometer (XRD). Scanning electron microscopy (SEM) analysis of the powders showed that using ultrasonic deagglomeration significantly decreased the particle size with perfect homogeneity in the shortest time. The particle size of the powders was calculated as 44.7 nm and 80.4 nm for ultrasonic and mechanochemical deagglomeration, respectively. The sintered pellet by ultrasonic method had no abnormal grain growth, and the grain sizes were between 10 and 30 μm. The pellet by mechanochemical method had an abnormal grain growth, and the grain sizes were between 10 and 100 μm. The results showed that ultrasonication remarkably improved the structure of the samples in the shortest time.