Dispersion,rheology and aqueous tape casting of alumina–zirconia composites |
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Abstract: | AbstractAlumina and zirconia were dispersed individually in aqueous media using Darvan C as the dispersant and at optimised pH condition. Based on sedimentation, rheology, yield stress, electrodeposition and zeta potential measurements, 2 wt-% of the dispersant and a pH of 10·5 were found to be the optimum condition for the codispersion of alumina and zirconia. Aqueous tape casting slurries with a solid loading of 32 wt-% were prepared under the optimised conditions of dispersion. Alumina–zirconia (50 : 50) composite tapes of 40 μm thickness and 56% green density were obtained. |
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Keywords: | ALUMINA ZIRCONIA COMPOSITES DISPERSION RHEOLOGY TAPE CASTING |
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