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JOURNAL OF POROUS MATERIALS, vol.31, no.5, pp.1811-1816, 2024 (SCI-Expanded)
In this work, the dielectric and electrical properties of the complex oxides La0.5Ba0.5MnO3 and La0.97Ba0.03MnO3 were studied. The studies were carried out at a temperature T = 25-225 degrees C and a frequency f = 20-10(6) Hz ranges. For these compounds, the values of physical parameters (dielectric constant, dielectric losses, dielectric constant and electrical conductivity) characterizing dielectric and electrical properties are determined. From the temperature and frequency dependence of the parameters, it was established that with increasing temperature and frequency, the value of electrical conductivity in these compounds increases. A semiconductor-metal phase transition was detected in this compound at a temperature T similar to 140 degrees C. Oxide materials are used in a variety of processes due to their interesting chemical properties. It is known that in the process of condensation of methane with oxygen, along with ethane and ethylene, heavy hydrocarbons are also obtained. Nd2O3/MgO, La2O3/MgO, oxides of alkali and alkaline earth metals, as well as PbO oxide are used as catalysts for this process. Recently, BaSnO3 and MnTiO3 compounds with a perovskite structure have been used as catalysts in these processes. Therefore, it is very important to obtain new perovskite materials and study their physical and chemical properties.