Slurry composition and process for producing ceramic moulds

Details Slurry composition and process for producing ceramic moulds Slurry composition and process for producing ceramic moulds

B - Operations, Transporting

22

C

B22C 1/02 (2006.01) B22C 1/00 (2006.01) B22C 1/16 (2006.01) B22C 9/00 (2006.01) B22C 9/04 (2006.01)

Patent

CA 2372410

A ceramic mould slurry is disclosed for forming moulds and metal castings of improved surface quality. The slurry comprises a binder, a gelling agent, a first refractory material having a density of .RHO.1 and a mean particle size of .alpha.1, and a second refractory material having a density of .RHO.2 and a mean particle size of .alpha.2, wherein .RHO.1 > .RHO.2 and .alpha.1 < .alpha.2. The denser refractory material migrates downward through the slurry toward the upward-facing mould surface, thereby allowing formation of a smooth and accurate surface.

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