Investigation of affecting parameters on slip casting of yttria-magnesia IR-transparent bodies. Issue 8 (1st June 2019)

• Record Type: Journal Article
• Authors: Mahmoudian Mahmoudabad, M.; Hashemi, B.
• Is Part Of: Ceramics international. Volume 45:Issue 8(2019)
• Page Start: 10400
• Page End: 10413
• Publication Date: 2019-06-01
• Subjects: Slip casting -- MgOY2O3 -- Suspension -- SPS technique; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.02.099
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Slip casting of MgOY2 O3 suspensions has been investigated in this research. For this purpose relatively pure commercial raw materials were used. The Taguchi experiment method was used for design of experiments and selection of suitable solvents and dispersants and theirs optimum values. Preparation of suspensions was done in two stages, according to particle size distributions of powders after different milling time and Taguchi results. The best suspensions were selected based on viscosity and solid load of suspensions. Green bodies were slip casted using the optimized suspensions in order to obtain the green bodies with maximum density and a homogeneous structure in term of porosity size distribution. Results showed that using from ethanol as solvent, an optimum dispersant level of 3%wt. TEA +1%wt. DEA with a constant TEA/DEA ratio of 3/1 and mean particle size of 155 nm (milling time of 48 h) was the best choice for preparing of optimum suspensions. The highest relative green density of 65.91% was obtained for a suspension containing 35 vol % of solid particles casted under 3MPa. The dense Y2 O3 MgO submicron composite samples were sintered by SPS technique at 1250 °C under 70MPa for 6 min with a density about 99.5%.