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SLIP CASTING (Advantage (High reproducibilty rate with smooth surface and…
SLIP CASTING
definition- forming technique for the mass production of pottery and other ceramics
Deffloculant
function- prevent flocculant, reduce viscosity and clog
Example
Na Silicate
Calgon
Dispex
Advantage
High reproducibilty rate with smooth surface and fine details
produce big and bulky products
used to manufacture complex shaped product
can use any form of ceramic suspension as long as it is chemically stable
Disadvantages
need large working area
period is too long during processing
need to dry cast and working mould
Parameter that need to be controlled
1)slip density
2)viscosity
3)thixotropy
Stages in slip casting
1) Pouring of slurry into a porous mould
2) Extraction of water through pores and void in mould
4) Excess slip is removed
3) Forming of solid layer on the surface of the mould
Type of casting
Drain Casting
Solid casting