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Recently,the piezoelectric,dielectric,ferroelectric and photocatalytic properties of sodium niobate have been intensively studied,and phase compositions,dimensions and morphologies have significant influence on their properties.Herein,controllable synthesis of sodium niobates has been achieved via reforming synthetic process,changing solvent composition and adjusting raw material types/ratios.Cubic structural sodium niobate nanopowders have been obtained using EG as reactive medium,and their morphology varies from nanoparticles to nanowires when a temperature fluctuation is introduced.