In this work ceramic powders of barium titanate (BaTiO3) were synthesized by two chemical methods: coprecipitation and polymeric precursor (Pechini). These methods, highly reproducible and reliable, allowed to obtain nanosized BaTiO3 particles (<200 nm) with high chemical purity, at a temperature of 650 °C; moreover, the cubic phase of BaTiO3 was stabilized at room temperature. We conducted a brief discussion on the mechanisms of particle formation and an adequate description of the synthesis processes. The powders were characterized using infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermal analysis (DTA/TGA) and transmission electron microscopy (TEM).