Effect of Preheating Temperature on Synthesis of Pure BiFeO3 via Sol–Gel Method

Abstract

BiFeO 3 (BFO) nanopowder was synthesized in a pure form via a sol-gel method based on glycol gel reaction. Effect of drying and preheating temperature on preventing other phases was studied. Many parameters were studied as calcination temperature and time & stirring temperature as well. The prepared powder was characterized by X-Ray Diffraction of powder (XRD) and Transmission Electron Microscope (TEM). High pure BiFeO 3 was obtained by preheated process at 400 °C for 0.5 h and calcination at 600 °C for 0.5 h without any impurities compared to dry at110 °C.

Structural Stability and Magnetic Ordering in BiFeO3 Perovskite Oxide: A Comparative Study GGA+U vs L(S)DA+U

“…Perovskite structure materials are of great interest in science researcher due to their specific properties and simple structure ABX 3 designated with (Pm-3m) space group where X is a non-metal and A and B span a large portion of the periodic table [1][2][3][4][5][6][7][8][9][10]. They are important in numerous high technology applications, they possess a large number of industrially important applications, including charge storage devices, Memories, Fuel Cells, capacitors, actuators, chemical reactors, energy storage, non-volatile random access memory devices, hydrogen sensors, microelectronics industry, optoelectronics sensors, piezoelectric motors wave guides, laser frequency doubling, heterogeneous catalysts, catalytic activity, atomic microscopes, ultrasound generators, , ink-jet printers and fuel injectors [11][12][13][14][15][16][17][18][19][20]. The perovskite-type oxides ABO 3 have also a multifunctional application in different area such as Thermoelectricity, Ferroelectricity, Electricity, Superconductivity, Colossal magneto resistance, (Anti)-Ferromagnetism, Multiferroism, Piezoelectricity, Semiconductivity, Elasticity, Plasticity, Thermoelectricity, Mechanical-bending-induced, Thermodynamic stability and compatibility in mechanical properties.…”

“…Much researcher on the synthesis of BiFeO 3 using different methods have been done of these solid-state [14], [15], mechano-chemical [14], [15], [16], solution chemistry method such as ions assisted controllable synthesis hydrothermal method [14], [18], [20], sonochemical [14], [21], solution-combustion method [14], [22], and soft chemical method [14], [23]. Most of mentioned procedures need high-temperature treatments (>800°C) and the appearance of second phase still the major issue of them [14], [24]. he perovskite Bismuth ferrite BiFeO 3 (BFO) is considered to be a model multiferroic and offers a rare multiferroelectric robustness since it presents a coexistence of ferroelectric and antiferromagnetic order up to unusually high temperatures [31].…”