Method for preparing bismuth ferrite powder by microwave hydrothermal method

• Main Authors: ZHENG YUQIN, TAN GUOQIANG, BO HAIYANG
• Format: Patent
• Language: Chinese; English
• Published: 24.02.2010
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY

The invention discloses a method for preparing bismuth ferrite powder by microwave hydrothermal method, comprising: (1) dissolving FeCl3.6H2O and Bi(NO3)3.5H2O in proper amount of glycol to prepare into a parent salt solution; (2) dripping the parent salt solution into an aqueous ammonia solution with the concentration being 0.1-0.5mol/l and dripping speed being less than 2ml/min, and after finishing dripping, continuing to stir for 0.4-1h to obtain a deposit; (3) washing the deposit with de-ionized water repeatedly, ageing, and preparing a hydrothermal reaction precursor; and (4) adding the precursor solution into a microwave hydrothermal reaction kettle with the filling ratio being 60-75%, adding a mineralizer into the reaction kettle, placing the reaction kettle into a microwave assistant hydrothermal synthesizer to react for certain period, taking out a product in the reaction kettle, washing with de-ionized water to obtain a neutral product, washing the neutral product with absolute ethanol, and drying a