As one of the most mature aluminum sheet continuous strip-casting processes,Hazelett strip-casting has been successfully industrially applied.This work introduced the key refractory materials for Hazelett strip-castin...As one of the most mature aluminum sheet continuous strip-casting processes,Hazelett strip-casting has been successfully industrially applied.This work introduced the key refractory materials for Hazelett strip-casting process,including large-scaled Al_2O_3 ceramic foam filters,wide-feed head boxes,monolithic strip-stream nozzles,and coatings on twin-belt.Besides,the localization of the refractory materials was discussed.展开更多
Aluminum nitride ceramic sheets were formed for the first time by a novel and simple method,namely gel-tape-casting process,where only two additives were used to prepare the slurries.PIBM (a water-soluble copolymer of...Aluminum nitride ceramic sheets were formed for the first time by a novel and simple method,namely gel-tape-casting process,where only two additives were used to prepare the slurries.PIBM (a water-soluble copolymer of isobutylene and maleic anhydride) acted as both dispersant and gelling agent,and PEG (polyethylene glycol) acted as plasticizer.Combining the advantages of gel-casting and tape-casting processes,flexible and uniform green tapes were obtained.The rheological properties of AlN slurries were studied to optimize the PIBM content and solids loading.After drying and debinding,the green sheets were sintered at 1840 ℃ in N2 atmosphere.Homogeneous microstructure with average grain size of about 7 μm was observed in the final AlN ceramics.Thermal conductivity of the AlN ceramics was 161 W/(m·K).展开更多
文摘As one of the most mature aluminum sheet continuous strip-casting processes,Hazelett strip-casting has been successfully industrially applied.This work introduced the key refractory materials for Hazelett strip-casting process,including large-scaled Al_2O_3 ceramic foam filters,wide-feed head boxes,monolithic strip-stream nozzles,and coatings on twin-belt.Besides,the localization of the refractory materials was discussed.
文摘Aluminum nitride ceramic sheets were formed for the first time by a novel and simple method,namely gel-tape-casting process,where only two additives were used to prepare the slurries.PIBM (a water-soluble copolymer of isobutylene and maleic anhydride) acted as both dispersant and gelling agent,and PEG (polyethylene glycol) acted as plasticizer.Combining the advantages of gel-casting and tape-casting processes,flexible and uniform green tapes were obtained.The rheological properties of AlN slurries were studied to optimize the PIBM content and solids loading.After drying and debinding,the green sheets were sintered at 1840 ℃ in N2 atmosphere.Homogeneous microstructure with average grain size of about 7 μm was observed in the final AlN ceramics.Thermal conductivity of the AlN ceramics was 161 W/(m·K).
