Structural and thermal analysis of BaFe11.9Ga0.1O19 and BaFe11.7Ga0.3O19

Abstract

Crystal structure and thermophysical properties of BaFe[Formula: see text]Ga[Formula: see text]O[Formula: see text] solid solutions have been studied by X-ray diffraction, thermogravimetry and differential scanning calarimetry methods. It is determined that these compounds have characteristic transitions at 72[Formula: see text]C and 85[Formula: see text]C temperatures. From the spectra of the TG and DTG loss of mass and energy are determined in the temperature range of 30–950[Formula: see text]C. At the temperature of T [Formula: see text] 120[Formula: see text]C, the endoeffects are chemically absorbed water on the active surface of the compound and are a decomposition of the hydroxide group. The endoeffect, at which its central peak reaches T [Formula: see text] 80[Formula: see text]C, is associated with an OH group that has been chemically absorbed, observed revised effects with a difference [Formula: see text]T [Formula: see text] 35[Formula: see text]C for relative decomposition at high-temperature.