# US 10,479,734 B2 · Method and apparatus for thermally debindering a cellular ceramic green body

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- Number: US 10,479,734 B2
- Document ID: US10479734B2
- Status: Granted
- Kind: B2
- Application number: 14/337,480
- Filed: 2014-07-22
- Published: 2015-02-19
- Granted: 2019-11-19
- Earliest claimed: 2013-08-15
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Douglas Munroe Beall; Dana Craig Bookbinder; David John Thompson; Jianguo Wang
- Web page: https://patentgrep.com/patent/US10479734B2

## CPC

- C04B 35/638: Removal thereof
- C04B 33/1305: {Organic additives}
- C04B 33/32: Burning methods
- C04B 35/195: Alkaline earth aluminosilicates, e.g. cordierite {or anorthite}
- C04B 35/478: based on aluminium titanates
- C04B 35/565: based on silicon carbide
- C04B 35/6365: {Cellulose or derivatives thereof}
- C04B 35/64: Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F})
- C04B 38/0006: {Honeycomb structures (from one or more corrugated sheets by winding or stacking C04B38/0083)}
- C04B 38/0012: {characterised by the material used for sealing or plugging (some of) the channels of the honeycombs}
- C04B 2111/00793: {as filters or diaphragms}
- C04B 2111/343: {Crack resistant materials}
- C04B 2235/6562: Heating rate
- C04B 2235/6584: at an oxygen percentage below that of air
- C04B 2235/6586: Processes characterised by the flow of gas
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

An apparatus and method for debindering a cellular ceramic green body. The apparatus includes a flow modulation member to selectively restrict circulation of a heated oxygen-containing atmosphere through a top of a cellular core section of the green body. The method includes heating the green body in a circulating oxygen-containing atmosphere while selectively restricting circulation of the atmosphere through the top of the cellular core section of the green body.

## Claims

### Claim 1

A method for debindering a cellular ceramic green body comprising a top face and a bottom face with axial honeycomb channels extending therebetween, the method comprising:
heating the green body in a circulating oxygen-containing atmosphere; and
selectively restricting circulation of the circulating oxygen-containing atmosphere to the green body with a flow modulation sleeve around a side of the cellular ceramic green body;
wherein the sleeve comprises a honeycomb body having a cavity into which the cellular ceramic green body can be placed.

### Claim 2 (depends on 1)

The method of claim 1 wherein the sleeve surrounds an outer periphery of the cellular ceramic green body.

### Claim 3 (depends on 2)

The method of claim 2 wherein the sleeve is spaced apart from the outer periphery of the cellular ceramic green body.

### Claim 4 (depends on 1)

The method of claim 1 wherein the sleeve is comprised of cordierite.

### Claim 5 (depends on 1)

The method of claim 1, wherein the heating is performed while supporting the cellular ceramic green body on a horizontal support surface and wherein the sleeve blocks the circulating oxygen-containing atmosphere flow to an outer peripheral side of the cellular ceramic green body.

### Claim 6 (depends on 5)

The method of claim 5 wherein the sleeve surrounds the outer peripheral side of the cellular ceramic green body.

### Claim 7 (depends on 6)

The method of claim 6 wherein the sleeve is spaced apart from the outer peripheral side of the cellular ceramic green body.

### Claim 8 (depends on 5)

The method of claim 5 wherein the sleeve is comprised of cordierite.

### Claim 9 (depends on 5)

The method of claim 5 wherein the sleeve comprises organic material.

### Claim 10

A method for debindering a cellular ceramic green body comprising a top face and a bottom face with axial honeycomb channels extending therebetween, the method comprising:
heating the green body in a circulating oxygen-containing atmosphere; and
selectively restricting circulation of the circulating oxygen-containing atmosphere to the green body with a flow modulation sleeve around a side of the cellular ceramic green body;
wherein the sleeve comprises organic material.