Ceramic precursor batch compositions for increased stiffening onset temperature using organic additive heteroatom polyols

摘要

A ceramic precursor batch composition comprising inorganic ceramic-forming ingredients, a binder, an aqueous solvent and a heteroatom polyol agent. The heteroatom polyol agent can be represented by X(R) where X is at least one of S, N, and P, and R is at least two of CH3, CH2CH2OH, CH2CH2CH2OH, CH2(CHOH)CH3, C(CH2OH)1-3, CH2OH, CH(CH2OH)CHOH, C(O)(CHOH)1-4CH2OH, and CH2CH2CH2OCH3. The presence of the heteroatom polyol agent provides a composition with a lower viscosity and/or a greater batch stiffening temperature (Tonset) allowing for increased rates of extrusion. Methods for producing a ceramic honeycomb body using this ceramic precursor batch composition are also provided.

主权项

1. A method of producing a ceramic honeycomb body, comprising:
adding a cellulose-based binder, an aqueous-based solvent, and a heteroatom polyol agent to inorganic ceramic-forming ingredients, wherein the heteroatom polyol agent is optionally mixed with the aqueous-based solvent prior to adding to the inorganic ceramic-forming ingredients, wherein the heteroatom polyol agent is represented by X(R) where X is at least one of S and P, and R is at least two of —CH2CH2OH, CH2CH2CH2OH, CH2(CHOH)CH3, C(CH2OH)1-3, CH2OH, CH(CH2OH)CHOH, and C(O)(CHOH)1-4CH2OH, or at least one of C(CH2OH)2-3, CH(CH2OH)CHOH, and C(O)(CHOH)1-4CH2OH combined with at least one of CH3 and CH2CH2CH2OCH3; mixing the inorganic ceramic-forming ingredients, the binder, the solvent, and the heteroatom polyol agent to form a precursor batch; forming the precursor batch into a green honeycomb body; and firing the green honeycomb body to produce the ceramic honeycomb body.