Comparison of Different Alumina Powders for Aqueous Tape Casting Process

Fernanda P. Santos; Ediana Gambin; Cristina Moniz A. Lopes; Rosa Maria Rocha

doi:10.4028/www.scientific.net/MSF.820.172

Paper Titles

Sintering of Ca₂MgWO₆ Ceramic and its Stability Test in Crude Petroleum
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High Energy Milling of Alumina Synthesized by Combustion Reaction Using a Vertical Shaft Attritor Mill: Influence of the Milling Time Length
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Immobilized Enzyme Gox with Ferrite CoFe₂O₄ and Hybrid CoFe₂O₄/APTS
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Pure and La^3+/Nd³⁺ Doped SrTiO₃ Powders Obtained by Solid State Reaction and Microwave Assisted Hydrothermal Synthesis
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Comparison of Different Alumina Powders for Aqueous Tape Casting Process
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Influence on Doping of 0.4 mol of Co in ZnO Aiming their Application in DMS
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Dielectric Characterization at High Temperature of Iron Doped Potassium Strontium Niobate Ceramic by Impedance Spectroscopy
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ZnO-Nb₂O₅-TiO₂ Dielectric Resonators and Porosity Influence on Dielectric Constant Values
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Application of Micromagnetic Models for Barium Ferrite Magnets
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HomeMaterials Science ForumMaterials Science Forum Vol. 820Comparison of Different Alumina Powders for...

Comparison of Different Alumina Powders for Aqueous Tape Casting Process

Abstract:

Tape casting process was used to produce Al₂O₃ substrates in an aqueous system with acrylic latex emulsion as binder. The present work studied the slurry formulations in aqueous medium of Al₂O₃ powders with different particle size distribution and made correlation to the green and sintered tapes. Two commercial alumina powders, one sub-micrometric and other micrometric were used. Compositions of Al₂O₃ slurries with 80 and 83 wt% of solids were prepared by dispersing the powders in water with a dispersant with subsequently additions of 7 and 10 wt% of binder. Sub-micrometric Al₂O₃ resulted in a high densification tapes regardless solid concentration and binder amount in the slurry, though green density was affected. For micrometric alumina, increasing the solid concentration resulted in a little higher final density.