Ceramic Slurry Composition

A composition and method for forming investment casting shells includes using colloidal silica zircon flour and fused silica in a slurry which is applied to a pattern.

Ceramic slurry composition. A ceramic material is an inorganic non metallic often crystalline oxide nitride or carbide material. A commercial synthetic binder used with slurry. A ceramic slurry composition according to claim 2 wherein the anionic dispersing agent has at least one intermolecular carboxyl group maleate group sulfonic group or phosphate group. A ceramic slurry composition has a powdered ceramic uniformly dispersed therein without excessive damage thereto.

The slurry was mixed properly with. A ceramic mould slurry is disclosed for forming moulds and metal castings of improved surface quality. A ceramic slurry composition has a powdered ceramic uniformly dispersed therein without excessive damage thereto. The ceramic slurry composition contains the powdered ceramic a dispersing agent a binder and a solvent in which.

A method for producing a ceramic green sheet using the ceramic slurry composition and a method for producing multilayer ceramic electronic devices are also disclosed. Some elements such as carbon or silicon may be considered ceramics ceramic materials are brittle hard strong in compression and weak in shearing and tension. The ceramic slurry composition may have a viscosity in the range of form about 0 05 to about 5 pa s or from about 0 075 to about 2 5 pa s or from about 0 1 to about 1 at a shear rate of 20 rpms at 25 c. They withstand chemical erosion that occurs in other materials subjected to acidic or caustic environments.

The ceramic slurry composition contains the powdered ceramic a dispersing agent a binder and a solvent in which. Ceramic slurry is obtained by mixing ceramic powder carrying vehicle binder and dispersant to produce uniformly dispersed ceramic slurry. 3 3 development of ceramic slurry the composition of ceramic mold as shown in table 1 for investment casting was determined with 100 zircon for sample 1 50 zircon ad 50 alumina for sample 2 and 70 zircon and 30 fused silica. After the shell has solidified the pattern may be melted or otherwise removed.

Additionally the ceramic slurry composition may have stability such that the at least one ceramic particle polymer and or crosslinking. A ceramic slurry composition according to claim 1 wherein the average particle diameter of the powdered ceramic is about 0 01 to 1 μm. After the slurry is applied to the pattern it is allowed to partially or completely solidify. It is important to optimize the slurry composition in order to obtain high green density low green shrinkage and sufficient green strength to produce defect free demolding.

A ceramic mould slurry is disclosed for forming moulds and metal castings of improved surface quality. A method for producing a ceramic green sheet using the ceramic slurry composition and a method for producing multilayer ceramic electronic devices are also disclosed.