A　kind　of　lead-free　nanocrystalline　powder,　(Li0.06Na0.47K0.47)NbO3　(LNKN),　has　been　prepared　by　a　newly　developed　sol-gel　method　using　Nb2O5　as　the　Nb　source.　Phase　analysis,　microstructure　and　morphology　of　the　powder　were　determined　by　X-ray　diffraction　(XRD),　Fourier　transform　infrared　(FTIR),　Raman,　transmission　electron　microscope　(TEM)　and　high-resolution　transmission　electron　microscopy　(HRTEM).　The　experimental　results　showed　that　pure　perovskite　phase　was　formed　at　the　temperature　as　low　as　500　degrees　C.　Besides,　the　obtained　powder　belonged　to　tetragonal　symmetry,　and　the　mean　particle　size　was　as　small　as　20nm.　It　is　believed　that　the　high-quality　gel　precursor　and　low　processing　temperature　play　a　key　role　in　the　formation　of　the　LNKN　nano-particles.　The　process　developed　in　this　work　was　convenient　to　realize　the　mass　production　of　LNKN　nano-powders　at　low　cost.　(C)　2008　Elsevier　B.V.　All　rights　reserved.