A New Method for Synthesizing Li_(2.06)Nb_(0.18)Ti_(0.76)O_3 Powder at Low Temperatures

摘要

Li_(2.06)Nb_(0.18)Ti_(0.76)O_3 powder has been successfully prepared at low temperatures via a facile and manageable, activated pre-treatment on the inert raw Nb_2O_5. It is demonstrated that with triethanolamine, citric acid, and hydrogen peroxide, this simple pretreatment process could activate Nb_2O_5 efficiently. Pure Li_2TiO_3 solid solution phase was thus obtained by calcining the mixture of the activated Nb_2O_5, LiOH • H_2O, and Ti(C_4H_9O)_4 at temperatures as low as 650℃, which is about 200℃ lower than that of the traditional solid-state method. To the best of our knowledge, this temperature is the lowest one for preparing Li_2TiO_3 solid solution. Additionally, the phase transformation and the morphology of the final powder are also discussed.