Na0.9K0.1NbO3 nanostructures have been prepared by a molten salt synthesis method using KCl-NaCl as medium. Though the equal amount of Na2CO3 and K2CO3 has been introduced, the resulted products are a Na rich Na0.9K0.1NbO3, not Na0.5K0.5NbO3. Due to the higher diffusion rate of Na+ ions compared to that of K+ ions, the Na+ ions preferentially occupy the A-site in the perovskite structure, facilitating the formation of Na0.9K0.1NbO3. Moreover, Na0.9K0.1NbO3 ceramics densified from nanostructures show the saturated ferroelectric loop. The coercive electric field E-c and remanent polarization P-r are 45 kV/cm and 17 mu C/cm(2), respectively. (C) 2013 Elsevier B.V. All rights reserved.