The　perovskite-type　La0.9Bi0.1AlO3　(LBAO)　relaxor　nanocrystalline　have　been　prepared　by　a　novel　two-step　molten　method　consisting　of　a　mechanically　milling　induced　metathesis　reaction　followed　by　calcining　at　temperature　above　nitrates　melting　point.　The　results　show　that　the　pure　LBAO　phase　has　been　obtained　at　about　550　degrees　C,　which　is　lowered　by　about　500　degrees　C　comparing　to　a　conventional　solid-state　reaction.　The　present　particles　were　characterized　by　rhombohedral　perovskite　structure　in　space　group　R-3C,　consisting　of　plate-like　nanostructures　with　an　average　size　of　similar　to　50　nm.　Moreover,　LBAO　ceramics　densified　from　nanocrystalline　show　the　improved　dielectric　properties　compared　to　parent　LaAlO3,　which　is　promising　for　development　of　new　lead-free　ceramic　devices.　(c)　2013　Elsevier　B.V.　All　rights　reserved.