Low-temperature synthesis of barium zirconate (BaZrO₃) was carried out using the composite-hydroxide-mediated (CHM) approach. The CHM method is based on chemical reaction of materials in the eutectic hydroxide melt. In this system, the eutectic point is at an NaOH:KOH molar ratio of 51.5:48.5 and a temperature of 165°C. The raw materials used to prepare BaZrO₃ were zirconium dioxide and barium hydroxide. In this study, the morphology of the obtained BaZrO₃ powder was investigated. X-ray diffraction measurements confirmed the formation of BaZrO₃ with a perovskite structure. Scanning electron microscopy and transmission electron microscopy observations indicated that BaZrO₃ nanocrystals were formed.