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Method for making ceramic article

A technology of ceramics and ceramic bodies, which is applied in the field of ceramic manufacturing, can solve problems such as excessive batch material mixing, shearing and extrusion pressure, and achieve the effect of improving production efficiency

Inactive Publication Date: 2011-06-01
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention is well suited to solve problems due to excessive batch mixing shear and extrusion pressure of these formulations

Method used

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  • Method for making ceramic article
  • Method for making ceramic article
  • Method for making ceramic article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] 1. Paste mixing and rheology testing

[0036] A bulk ceramic powder batch material suitable for extruding ceramic bodies such as ceramic honeycombs is compounded from a blend of the following components: ceramic powder, methylcellulose binder, water, and An optional porogen for the porosity of the ceramic material. Selected batches contain high molecular weight polymeric dispersants to improve the mixing properties of the batch. Table 1 below lists the approximate composition of the batch except for the water (medium) in the batch, wherein all proportions of components are in parts by weight. All dry components, including inorganic oxides and salts as well as graphite, starch and cellulose binders, are weighed as fine powders.

[0037] Table 1. Plasticized Ceramic Paste Compositions

[0038]

[0039] * Dispersant 1 = Solsperse 40000 - a proprietary commercially available anionic phosphated alkoxylated polymer;

[0040] Noveon Inc., Cleveland, OH, USA; molecular ...

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PUM

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Abstract

Extruded ceramic bodies such as extruded honeycomb bodies formed of plasticized ceramic powder pastes made from paste batches comprising one or a combination of ceramic powders together with a water vehicle and a cellulose ether binder, wherein a high-molecular-weight polymeric dispersant is incorporated in the batches to reduce batch mixing torque and extrusion pressure while maintaining the stiffness and mechanical durability of the extrusions.

Description

[0001] Related Application Cross Reference [0002] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Patent Application No. 61 / 125952, filed April 30, 2008. technical field [0003] The present invention relates to the field of ceramic manufacturing, in particular to a method for the manufacture of ceramic articles having complex configurations by extrusion of plasticized, highly filled ceramic pastes. Background technique [0004] The fabrication of complex ceramic shapes such as ceramic honeycombs by extrusion of plasticized mixtures of ceramic powders dispersed in a liquid medium is well known. One of the largest applications of this technology is in the manufacture of ceramic honeycombs for the treatment of fluid streams, particularly exhaust gases from internal combustion engines, to remove pollutants therefrom. Therefore, ceramic honeycombs composed of materials such as cordierite, silicon carbide, and aluminum titanate are widely used to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/478C04B35/634C04B35/636C04B35/111C04B35/46B28B3/20
CPCC04B2235/3418C04B2235/6021B28B2003/203C04B2235/3227C04B35/62635C04B2235/3218C04B35/111C04B35/6264C04B35/6346C04B35/478C04B2235/3208C04B2235/3213C04B35/46Y10T428/24149
Inventor M·D·法比安K·R·姆克阿瑟
Owner CORNING INC
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