In　this　work,　submicrometer　bismuth　ferrite　(BiFeO3)　particles　have　been　prepared　at　the　temperature　of　750　degrees　C　by　the　improved　solid　state　reaction,　in　which　the　quick　sintering　step　is　crucial　in　obtaining　pure　perovskite　phase.　The　X-ray　diffractometer　(XRD)　analysis　indicates　that　the　obtained　BiFeO3　particles　are　rhombohedral　structure,　and　the　refined　cell　parameters　are　a=5.622　angstrom　and　a=59.355　degrees　(R=8.35%),　similar　to　the　reported　data　(JCPDS　Card　86-1518,　a=5.632　angstrom　and　a=59.356　degrees).　The　microstructure　has　been　observed　using　transmission　electron　microscope　(TEM),　and　the　image　shows　that　BiFeO3　powders　have　the　quasi　spherical　morphology　with　the　mean　particle　size　between　100-150nm.　Further,　the　distinct　lattice　fringes　reveal　the　nature　of　the　single-crystalline　BiFeO3　nanostructure,　and　the　interplanar　spacing　is　about　0.87nm,　corresponding　well　to　the　double　spacing　of　(012).　Moreover,　it　is　interesting　to　note　that　there　existed　the　dislocation　in　BiFeO3　particle,　which　is　believed　to　arise　from　the　collision　of　different　grains　in　growing　process.　The　sintered　compact　bodies　from　BiFeO3　fine　particles　show　the　slim　ferroelectric　loops,　and　dielectric　properties　are　frequency　independent.　The　measured　dielectric　constant　and　loss　tangent　are　19.5　and　0.0025　at　room　temperature,　showing　the　potential　application　in　multiferroic　devices.