Fabrication Of Dense Alumina Through Slip Casting Process

Siti Norfaznie , Ahmad Najib (2009) Fabrication Of Dense Alumina Through Slip Casting Process. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Dense alumina products were prepared through slip casting method. Slips are prepared at different alumina and ball clay content. The slips were prepared by mixing the powders with water as solvent and dispersant at different composition of alumina and ball clay content in each batch. Three different body formulated were prepared named as batch A, B and C. The process sequence for ceramic forming by using slip casting are started by setting the composition, followed by mixing the starting raw material as well as slip preparation through roller milling to obtain the homogenous slip and casting by using the plaster of Paris mold, drying of slip cast, into bisque formation and lastly the specimen was sintered. Mechanical properties and microstructures of dense alumina product were evaluated, analysis methods used in this project research are measure degree of shrinkage, Scanning Electron Microscopy (SEM) for microstructural observation, X-Ray Diffraction (XRD) for phase observation, three point bending test for flexural strength measurement of the specimen. All the specimen from batch A with the 0.1% ball clay addition have fracture during the drying stages. Batch C have higher shrinkage and higher flexural strength compared other two batches. From the microstructural image less pores for batch C specimen are reveal.

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