Zr-substituted　(Bi0.5Na0.5)(Ti1−xZrx)O3　(BNTZ)　with　x　=　0.02–0.4　ceramics　were　prepared　using　solid-state　reaction　technique　and　their　structural,　dielectric　and　ferroelectric　properties　were　investigated　systematically.　X-ray　diffraction　results　suggest　that　Zr4+　ion　can　enter　the　(Bi0.5Na0.5)TiO3　(BNT)　crystal　lattices　at　a　limited　value　and　a　secondary　phase　appears　in　BNTZ　ceramics　when　the　x　exceeds　0.1.　Temperature-dependent　dielectric　permittivities　of　BNTZ　ceramics　show　only　one　dielectric　peak　from　room　temperature　to　500　°C　for　each　composition,　and　this　dielectric　peak　becomes　broad　gradually　as　x　increases　from　0.02　to　0.4.　The　permittivity　of　x　=　0.4　varies　less　than　±10%　between　room　temperature　and　300　°C,　indicating　a　superior　thermal　stability　of　the　permittivity.　Polarization　enhancement　is　revealed　by　the　polarization-electric　field　hysteresis　loops　and　highest　ferroelectric　properties　are　obtained　in　x　=　0.04.　The　electric-field-induced　strains　of　x　=　0.04　show　a　monotonous　increase　as　temperature　increases　from　30　°C　to　150　°C.　At　80　kV/cm,　a　high　strain　level　of　0.268%　is　achieved.　Our　results　suggest　that　the　introduction　of　Zr4+　ion　could　effectively　tailor　the　dielectric　and　ferroelectric　properties　of　BNT　ceramics　and　x　=　0.4　composition　could　find　potential　application　in　high　temperature　capacitor　devices.　©　2020　Elsevier　Ltd　and　Techna　Group　S.r.l.