Fe-containing　niobate　Ba4Nd2Fe2Nb8O30　with　tungsten　bronze　structure　was　prepared　by　solid　state　reaction　method.　Effects　of　annealing　on　structure　and　properties　of　the　as-sintered　and　annealed　Ba4Nd2Fe2Nb8O30　ceramics　in　different　atmospheres　were　investigated,　respectively.　Results　show　that　only　the　tungsten　bronze　phase　is　observed　in　both　of　the　ceramics.　Although　annealing　treatment　does　not　change　the　phase　composition,　the　obvious　effect　of　annealing　is　observed　on　the　dielectric　and　ferroelectric　properties　through　adjusting　the　content　of　oxygen　vacancies　and　order　degree　of　ion　distribution.　Unit　cell　volume　of　the　Ba4Nd2Fe2Nb8O30　ceramics　shrinks　or　expands　when　annealed　in　N2　and　O2,　respectively.　Both　the　dielectric　constant　and　dielectric　loss　of　the　Ba4Nd2Fe2Nb8O30　ceramic　annealed　in　N2　were　obviously　higher　than　those　of　the　other　ceramics.　Moreover,　no　electric　hysteresis　loop　at　room　temperature　is　observed　in　the　Ba4Nd2Fe2Nb8O30　ceramics　annealed　in　N2.　While　the　ferroelectricity　of　the　ceramics　annealed　in　O2　is　more　stronger　than　that　of　the　as-sintered　one.　©　2015,　Chinese　Mechanical　Engineering　Society　of　Heat　Treatment.　All　right　reserved.