©　2018　Elsevier　Ltd　and　Techna　Group　S.r.l.　Lead-free　(1-x)　(0.94Bi1/2Na1/2TiO3　−0.06BaTiO3)-xSr0.53Ba0.47Nb2O6　(BNBT-xSBN,　x　=　0–0.04)　ceramics　are　fabricated　through　a　conventional　solid-state　reaction　method.　The　structure　and　dielectric　properties　are　systematically　investigated.　The　dielectric　permittivity　of　BNBT-xSBN　is　suppressed　by　the　doping　of　SBN.　The　temperature　of　the　dielectric　peak　in　the　lower　temperature　range　decreases　with　increasing　SBN　content.　As　the　SBN　doping　content　increases　from　0.01　to　0.04,　the　temperature　range　with　the　stable　dielectric　permittivity　(ε　±　15%,　1　kHz),　taking　the　ε　value　at　150　°C　as　the　base　point,　expands　from　319　°C　to　383　°C.　In　addition,　at　a　composition　of　x　=　0.01,　the　sample　shows　higher　dielectric　permittivity　(3964　±　15%,　1　kHz)　in　a　wide　temperature　range　(89–408　°C).　These　results　indicate　that　the　Bi1/2Na1/2TiO3-BaTiO3-xSr0.53Ba0.47Nb2O6　ceramic　is　a　promising　candidate　for　thermally　stable　electronic　capacitors　in　high　temperature　environments.