Relevance of the work is caused by the need to develop new cost-effective methods for producing barium aluminate. The main aim of the study was to obtain barium aluminate using liquid phase methods such as solution combustion synthesis, homogenization method of chelating agent, sol-gel method using citric acid as a polymerizing agent; to identify optimal conditions for a homogeneous product. The methods used in the study:thermal analyses were run on a NETZCH STA 449C instrument. The sample was heated at a temperature range from 25 to 1000 in an atmosphere of air. Powder X-ray diffraction was carried out using a Rigaku MiniFlex diffractometer with CuKα radiation (λ=1,5405 C). Measurement range was from 3 to 80 2θ, the rate of capture 2 °/min. Infrared spectra were measured on a Nicolet 6700 spectrophotometer. The results: The authors have investigated the synthesis of barium aluminate prepared by the sol-gel technology using the homogenization method of chelating agent, citrate method and solution combustion synthesis and have proposed a scheme of the synthesis of single-phase hexagonal barium aluminate. It involves the preparation of citrate complexes of aluminum and barium, polycondensation, drying to form a xerogel, heat treatment to obtain the final product.