Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology

In this work, alumina (Al2O3) ceramics were prepared using an environmentally friendly slip casting method. To end, highly concentrated (70 wt.%) aqueous suspensions of with different amounts the ammonium salt a polycarboxylic acid, Dolapix CE 64, as electrosteric dispersant. The stability Al2O3 was monitored by viscosity measurements. Green bodies (ceramics before sintering) obtained pouring stable into dry porous plaster molds. ceramic green sintered in electric furnace. Analysis effect three sintering parameters (sintering temperature, heating rate and holding time) on density performed response surface methodology (RSM), based experimental data according to Box–Behnken design, software Design-Expert. From statistical analysis, linear nonlinear models added first-order interaction developed for prediction optimization density-dependent variables: time.