Abstract
Sodium titanate Na2TinO2n+1 (2 ≤ n ≤ 9) is a well-known semiconductor that exhibits interesting electrical properties allowing numerous applications, such as: electrodes for solid-state batteries. In this work, we reported a novel, fast and simple route to produce sodium titanate (Na2Ti3O7 - NT) structures at low temperature and short time, by using microwave-assisted hydrothermal method. The NT powder synthesis was performed at 200 °C for 1 h and 4 h. Afterward, the as-synthetized powders were sintered to 900 °C for 1 h. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and complex impedance spectroscopy. It was identified a phase mixture of the polymorphs Na2Ti3O7 and Na2Ti6O13 with elongated rod-like morphology. Both samples showed a majority Na2Ti3O7 (≥95%) crystalline phase, as confirmed by Rietveld refinement. After ceramics sintering the total dc conductivity values between of 10-6 S/cm and 10-7 S/cm were achieved.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call