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Controlled pore size distribution porous ceramic honeycomb filter, honeycomb green body, batch mixture and manufacturing method therefor

A technology of porous ceramics and ceramic materials, applied in the field of porous ceramic powder filter material and its manufacturing, can solve problems such as coating pressure drop exceeding

Active Publication Date: 2008-12-03
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the pressure drop of the coating may significantly exceed the pressure drop of the uncoated

Method used

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  • Controlled pore size distribution porous ceramic honeycomb filter, honeycomb green body, batch mixture and manufacturing method therefor
  • Controlled pore size distribution porous ceramic honeycomb filter, honeycomb green body, batch mixture and manufacturing method therefor
  • Controlled pore size distribution porous ceramic honeycomb filter, honeycomb green body, batch mixture and manufacturing method therefor

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Embodiment

[0076] Such as figure 1 As shown, take dry component, wherein comprise each example pore forming agent of the present invention listed in table 2 and molding aid (such as cellulose materials such as methyl cellulose, and sodium stearate), prepared cordierite Green body 10 serves as an example of the present invention. The dry ingredients are then mixed with a solvent carrier such as water and agitated in a preferably stainless steel grinder to form an extrudable plastic compound. The plasticized mass is then shaped, preferably extruded, into a green body as described in US 5,205,991 et al. After extrusion, the porous honeycomb green bodies were cut to record lengths.

[0077] The extruded green body 10 has a honeycomb structure having a plurality of substantially parallel celled honeycomb channels 11 formed at least in part of intersecting honeycomb walls 14 (otherwise referred to as a "network") extending from a first end 12 extends to the second end 13. The green body 10...

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Abstract

A porous ceramic honeycomb filter manufactured from an oxide-based ceramic material having a pore size distribution with d1 7.0 microns. Preferably, the oxide-based material is cordierite or aluminum titanate. Alternatively, the filter contains a cordierite-containing ceramic body with a narrow pore size distribution with db 1.00, wherein db = (d90 - d10) / d50. Also disclosed is a batch mixture, method and honeycomb green body made from mixture of inorganic source materials selected from the group of magnesia sources, alumina sources, and silica sources, and a pore former having a narrow particle size distribution with dps 0.90, wherein dps = {(dp90-dp10) / dp50}. The pore former is preferably selected from a group consisting of canna starch, sago palm starch, green mung bean starch, and single-mode potato starch.

Description

[0001] This application claims priority to US Provisional Application No. 60 / 741,355, filed November 30, 2005, and entitled "Controlled Pore Size Distribution Porous Ceramic Honeycomb Filter Material, Honeycomb Green Body, Batch Mixing and Method for Making the Same." technical field [0002] The present invention relates to porous ceramic honeycomb bodies and honeycomb green bodies, batch mixtures and methods for their preparation. More specifically, the present invention relates to porous ceramic powder filter materials exhibiting a controlled pore size distribution and methods for their manufacture. Background technique [0003] Recently there has been a lot of interest in diesel engines due to their inherent fuel efficiency and durability. However, diesel emissions have come under attack in both the US and Europe for being generally harmful. Likewise, stricter environmental regulations are required for diesel engines to comply with higher emission standards. Consequent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00
CPCC04B2111/00793C04B35/478C04B38/0012C04B2111/00129B01D39/2068C04B35/195C04B2111/0081C04B38/0006B01D2239/10C04B2111/343C04B2111/2084C04B38/0054C04B38/0074C04B38/0645
Inventor 缪卫国P·J·舒斯塔克J·L·斯科尔尼J·王谢玉明
Owner CORNING INC
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