Abstract
Nano-sized NaNbO3 powder has been successfully prepared by aqueous solution-gel method. The phase evolution of NaNbO3 powder is investigated by TG/DSC, X-rays spectra, FT-IR, and Raman spectra. The results show that the pure NaNbO3 phase has been obtained at about 375 °C, which is lowered by about 100 °C comparing to others’ work. In TEM studied, it shows the average particle size of ~ 70 nm for the powders heat-treated at 750 °C for 4 h. The powders heat-treated below 650 °C for 4 h shows a Pmnm symmetry, then change from O3 orthorhombic to O1 orthorhombic with the heat-treatment temperature above 650 °C.
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