The Characterizations of Tape Casting for Low Temperature Sintered Microwave Ceramics Composite

Sintering behavior of BaO-Nd2O3-TiO2 with a Pb-based glassceramics fit were investigated in order to understand an effect of glassceramics as a low temperature sintering agent on dielectric ceramics. A green sheet form was fabricated through tape casting method with the glassceramic fit added BaO-Nd2O3-TiO2. The dispersion properties, rheological properties and final density of dielectric composit slurry as a function of amount and composition of organic additives was examined. The dispersants' addition was effective in controlling dispersion of the ceramics in solution. The addition of excessive dispersant showed adverse effect on dispersion. The prepared slurries, containing ceramic powders, glass-ceramics and various kinds of organic viechles, exhibited typical shear thinning behavior. The best properties of tape casting appeared powder to solvent ratio 65 : 35 and amount of the binder 6 wt% and plasticizer 3 wt%. The viscosity of the sluny was 677 cps and green/sintered density in the tape was 3.3 g/cm(3), 5.56 g/cm(3) respectively.