Sodium　silicate　bonded　and　epoxy　bonded　magnetic　NdFeB　materials　are　fabricated,　respectively.　The　magnetic　properties,　temperature　coefficient,　heat-corrosion　and　compressive　strength　of　both　bonded　magnets　are　investigated.　Results　reveal　that　sodium　silicate　bonded　magnet　has　a　similar　comprehensive　property　to　epoxy　bonded　one.　Compared　to　the　epoxy　bonded　magnets,　the　sodium　silicate　bonded　NdFeB　has　better　temperature　coefficient　between　20　and　100　°C.　The　α　value　of　the　sodium　silicate　bonded　NdFeB　is　-0.127　%/°C　while　the　β　value　is　-0.275　%/°C　between　20　and　200　°C.　DSC　thermogram　shows　that　sodium　silicate　as　a　bonder　in　magnet　could　exist　at　a　higher　temperature　(above　1000　°C),　which　is　far　bigger　than　the　curie　point　of　NdFeB　magnet　powder.　The　weight　gains　of　sodium　silicate　bonded　magnet　obtained　in　heat-corrosion　resistance　test　are　smaller　than　those　of　epoxy　bonded　one.　Compressive　strength　test　shows　that　sodium　silicate　bonded　magnet　has　a　larger　compressive　strength　(35　MPa)　than　that　of　epoxy　bonded　magnet　(27　MPa).　Compared　to　the　epoxy,　the　sodium　silicate　as　bonder　in　the　bonded　magnet　shows　more　compact.　As　a　result,　the　sodium　silicate　bonded　NdFeB　bears　better　magnetic　properties,　temperature　coefficient,　heat-corrosion　resistant　and　compressive　strength.　©　2016　Trans　Tech　Publications,　Switzerland.