抄録
Microwave (Hybrid) Heating (MHH) was used to oxidize Al-Al2O3 powder mixture and sinter the oxidized alumina to produce low shrinkage porous alumina. Compared with conventional fast firing, MHH gave fast oxidation rate due to the surface ohmic current on Al powder. Porous alumina with low thickness change (+1%) and bulk density (2.78g/cm3) was produced. SEM analysis was used to explain the oxidation and sintering behaviours of Al-Al2O3 powder mixture.
