Preparation and characterization of Ba 1− xSr xTiO 3 ( x=0.1, 0.2) fibers by sol–gel process using catechol-complexed titanium isopropoxide

Abstract

Sol–gel synthesis of Ba 1− x Sr x TiO 3 ( x=0.1, 0.2) ceramic fibers with a diameter of 6–10 μm using catechol-complexed titanium isopropoxide, barium acetate hydrate and strontium acetate hydrate as precursors has been investigated. The green fibers and those sintered at different temperatures were characterized by thermogravimetry analysis (TGA), infrared spectroscopy (IR), X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. Microstructural development of barium strontium titanate (Ba 1− x Sr x TiO 3) ceramic fibers as a function of strontium concentrations was studied. X-ray diffraction indicated that the well-developed cubic phase of (Ba, Sr)TiO 3 was crystallized at 1100 °C.