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Method for manufacturing particulate filter

A technology for manufacturing particles and filters, which is applied in chemical instruments and methods, separation methods, filtration and separation, etc., and can solve problems such as insufficient air flow and insufficient porosity of complex structures

Active Publication Date: 2016-09-14
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation entails additional processing steps and costs
On the other hand, green plugging of the green body matrix material usually involves defects, for example due to factors such as: when green plugging is present at both ends of the green body matrix material, especially at the initial Insufficient porosity of the composite structure without significant porosity resulting in insufficient airflow through the part during firing
In addition, problems were found with the compatibility of the green body plug cement with the green body

Method used

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  • Method for manufacturing particulate filter
  • Method for manufacturing particulate filter
  • Method for manufacturing particulate filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Aluminum titanate (AT) porous ceramic green body has an outer diameter of approximately 6.44 inches, a wall thickness of 13 mils (1 mil = 1 / 1000 inch), and 300 channels / inch 2 (CPSI). The AT porous ceramic green body was plugged with AT plugging green body material as described below. The range of materials used for inorganic packaging of porous ceramic bodies and green plugging materials is shown in Table 1.

[0075] Table 1

[0076] Inorganic components

Amount (weight%)

Aluminum oxide

45-50

Titanium oxide

25-30

silica

8-12

strontium carbonate

5-10

Hydrated alumina

2-5

calcium carbonate

1-2

Lanthanum oxide

0-1

[0077] The precursor batch composition for the porous ceramic body also contained the material ranges of the additive ingredients shown in Table 2:

[0078] Table 2

[0079] Additional components in the ceramic body

Amount (% by weight, based on the weight...

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Abstract

A method for making a particulate filter comprising the steps of plugging at least some of the channels at a first end of a porous ceramic green body with a green body plugging material comprising a liquid carrier to form a partially plugged porous a ceramic green body, firing the partially plugged porous ceramic green body to form a partially plugged ceramic article, and sealing the second end of the partially plugged ceramic article with a plugging material having a setting temperature of less than 1000°C Block at least some of the channels.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §120 to U.S. Application Serial No. 13 / 285379, filed October 31, 2011, which application is based upon and is hereby incorporated by reference in its entirety. Background technique [0003] This document relates generally to methods of making particulate filters, and more particularly to methods of plugging and / or peeling particulate filters. [0004] Particulate filters, such as Diesel Particulate Filters (DPF), are increasingly being used in pollution control systems, such as automotive exhaust applications, where they are a critical component in most engine powertrains. Common filter materials include cordierite, silicon carbide, and aluminum titanate. [0005] Particulate filters are typically made of porous honeycomb with a checkerboard clogging pattern on each side. To allow flow through the filter, the plugging patterns on the inlet and outlet faces are offset by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00B01D39/20
CPCC04B38/0006C04B2111/00793B28B11/006C04B35/478C04B35/6264C04B35/6365C04B2235/3206C04B2235/3213C04B2235/3218C04B2235/3227C04B2235/3418C04B35/18C04B35/185C04B35/195C04B35/565C04B35/584
Inventor T·R·伯格尔T·P·圣克莱尔P·D·特珀谢B·P·乌塞克
Owner CORNING INC