Ceramic slip composition and method for making the same

A ceramic suspension composition comprising:

• a quantity of a metal titanate powder uniformly suspended in an aqueous carrier fluid ranging up to 30% by volume of total solids in said suspension and having an average particle size of 0.05 micron to 0.5 micron,
• said carrier fluid having a quantity of oxalic acid ranging from about 1 to about 3% by weight of said metal titanate powder,
• a quantity of polyethyleneimine of at least 1% by weight of said metal titanate powder,
• said suspension having an apparent viscosity of less than 3000 cps.

A ceramic slip composition comprising:

• quantity of ceramic powder uniformly suspended in an aqueous carrier fluid ranging up to 30% by volume of total solids in said suspension,
• said ceramic powder having a particle size of 0.5 micron or less,
• said carrier fluid having a quantity of passivating agent ranging from 0.5 to 5% by weight of said ceramic powder,
• a quantity of dispersing agent of at least 1% by weight of said ceramic powder,
• a quantity of organic binder of 12% or less by weight of said ceramic powder,
• said slip having a Bingham yield point of less than or equal to 210 dynes/cm2 and an apparent viscosity of less than 3000 cps.

A method for preparing a slip of ceramic powder by the steps consisting of:

• mixing up to 30% by volume of a ceramic powder having an average particle size of 0.05 micron to 0.5 micron in an aqueous carrier fluid containing a quantity of passivating agent ranging from 0.5 to 5% by weight of said ceramic powder,
• mixing a quantity of a dispersing agent ranging from at least 1% by weight of said ceramic powder with said suspension to achieve a uniformly distributed suspension with improved stability,
• adding a quantity of organic binder to form a slip, and
• introducing an additional quantity of water to achieve said volume percent loading level, and an apparent viscosity of less than 3000 cps.

A method for preparing a slip of ceramic powder by the steps consisting of:

• mixing up to 30% by volume of a ceramic powder having an average particle size of 0.05 micron to 0.5 micron in an aqueous carrier fluid containing a quantity of oxalic acid ranging from 0.5 to 5% by weight of said ceramic powder,
• mixing a quantity of a polyethyleneimine of at least 1% by weight of said ceramic powder with said suspension to achieve a uniform distribution of said ceramic with improved stability,
• adding 12% of polyethyleneimine by weight ceramic powder to form a slip, and
• introducing an additional quantity of water to achieve said volume percent loading level, and obtaining a Bingham yield point of 8 dynes/cm2 and an apparent viscosity of 779 cps.