In　this　paper,　Al2O3　was　added　to　CaO-SrO-B2O3-SiO2　sealing　system　to　tailor　the　structure　of　sealing　glass-ceramics　and　glass-ceramics/metal　interfacial　reaction.　The　addition　of　alumina　in　glasses　contributes　to　increasing　fraction　of　bridging　oxygen　in　silica　tetrahedral　as　well　as　the　change　in　boron　environment　from　three-fold　to　four-fold　(BO4→BO3).　The　devitrification　tendency　of　glasses　also　decreases　with　increasing　Al2O3　content.　The　condensed　glass　structure　and　increasing　residual　glass　content　play　opposite　roles　on　the　interfacial　reaction,　consequently　resulting　in　a　maximum　fraction　of　Cr6+　in　reaction　couples　between　Cr2O3　and　glass　containing　6mole%　Al2O3　at　700°C.　In　addition,　the　good　bonding　can　be　observed　at　the　interface　between　Cr-containing　interconnect　(Crofer　22APU)　and　glass　containing　4mole%　Al2O3,　held　at　700°C　for　100h.　The　reported　results　support　the　suitability　of　the　prepared　glass-ceramics　as　sealing　materials　for　SOFC　applications.　©　2014　Elsevier　Ltd.