Synthesis of potassium niobates by the microwave-assisted solvothermal method

Abstract: Potassium niobates have been synthesized by different methods, but few papers use the microwave-assisted solvothermal method, with possibility of a deeper evaluation in this area. In this work, the synthesis of KNbO3, KNb3O8 and K4Nb6O17 was performed by calcinations of precursors obtained by the microwave-assisted solvothermal method. This study evaluates the influence of various synthesis parameters such as reaction time, pH of the reaction medium, K+ concentration in the precursor solution. The results show the formation of different niobates, KNbO3, KNb3O8, K4Nb6O17, depending on the short and long-range order of the precursor used in the post annealing process.

Author(s): Duarte, TM; Honorio, LMC; Brito, AS; Souza, JKD; Longo, E; Tranquilin, RL; Souza, AG; Santos, IMG; Maia, AS

BRAZIL MRS MEETING 2014

Volume: 97

DOI: 10.1088/1757-899X/97/1/012001