Synthesis of potassium niobates by the microwave-assisted solvothermal method
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2015-11-11
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Duarte, T. M.
Honorio, L. M.C.
Brito, A. S.
Souza, J. K.D.
Longo, E. [UNESP]
Tranquilin, R. L.
Souza, A. G.
Santos, I. M.G.
Maia, A. S.
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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.
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IOP Conference Series: Materials Science and Engineering, v. 97, n. 1, 2015.