Preparation of alumina ceramic reflectors by gel casting

Slurry with good flowability and high solid content was prepared with micro-sized alumina powder and AM-MBAM gel.Hollow alumina ceramic reflectors were then fabricated by gel-casting using the prepared slurry.The effects of dispersant,initiator,monomer,solid content and other key factors on the gel-casting preparation of alumina ceramic reflectors were investigated.The results show that when the contents of dispersant,initiator and monomer are 0.4%,0.08% and 7%(mass fraction) respectively,the viscosity of the slurry reaches 710 mPa·s while its solid content is 55%(volume fraction).And,the alumina ceramic reflector prepared from this slurry shows a smooth surface and compact structure.