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Abstract
<jats:p>The effect of pretreatment of Bi2O3 and Fe2O3 oxides on the synthesis and structural characteristics of bismuth ferrite BiFeO3 was studied. It was found that BiFeO3 formation begins at 790÷850 °C, and decomposition occurs above ~920 °C. Preliminary melting of the oxides in a solar furnace shifts the thermal effects to higher temperatures and increases the thermodynamic stability of the phase. X-ray phase analysis revealed the formation of a perovskite-like structure with orthorhombic distortion, high crystallinity, and a crystallite size of 40±10 nm. Phase analysis confirmed an increase in the content of the main phase to 97 % and a decrease in the impurity phase Bi2Fe4O9. The obtained results confirm the efficiency of preliminary solar melting of oxides for the synthesis of high-quality ceramic materials based on BiFeO3.</jats:p>