Lead-free　ferroelectric　composite　ceramics　Na0.5Bi0.5TiO3:ZnO　(BNT:ZnO)　were　prepared　by　a　two-step　solid　phase　synthesis　method.　The　sintering　ability,　microstructures　and　ferroelectric　properties　of　the　composites　were　investigated　by　X-ray　diffraction　and　scanning　electron　microscopy.　The　results　show　that　the　incorporation　of　20%　(mole　fraction)　ZnO　leads　to　the　formation　of　the　third　phase　Zn2TiO4,　compared　to　pure　BNT　phase.　The　amount　of　Zn2TiO4　gradually　increases　with　the　increase　of　sintering　temperature.　According　to　the　hysteresis　loops　of　the　composite　ceramics　at　high　temperatures,　the　remanent　polarization　of　the　samples　sintered　at　1　000　still　retains　81%　at　room　temperature　when　the　test　temperature　is　135.　The　remanent　polarization　of　different　samples　does　not　reduce　as　the　temperature　increases,　thus　proving　that　the　built-in　electric　field　formed　by　ZnO　improves　the　ferroelectric　stability　of　BNT　at　high　temperatures.　©　2017,　Editorial　Department　of　Journal　of　the　Chinese　Ceramic　Society.　All　right　reserved.