Corning Incorporated

Michael James Lehman

Thomas William Brew

Elizabeth Marie Vileno

Mark Alan Lewis

Min Shen

David Jack Bronfenbrenner

Jeffery Scott Stone

Keith Norman Bubb

Kenneth Charles Sariego

Marcia K Hansen

Vaidyanathan Srikant

Ryan Joseph Grohsmeyer

Darryl Lynn Dunning

Deborah Lynn Shanley

Jennifer Schlehr O'Brien

Pamela Jeanne Murray

An extrusion die () including a plurality of pins () having side surfaces defining an intersecting array of slots () extending axially into the die () from a discharge face () of the die (). A plurality of feedholes () extend axially from an inlet face () of the die () opposite to the discharge face (). The feedholes () connect with the slots () at intersections () within the die () to create a flow path from the inlet face () to the discharge face (). A first coating () is on at least a portion of the feedholes () in a first zone () extending over a first axial length of the flow path. A second coating () that is different than the first coating () is on at least a portion of the side surfaces () of the pins () in a second zone () extending over a second axial length of the flow path. Methods of fabricating an extrusion die () and manufacturing a ceramic article (), such as a honeycomb body, are also disclosed.

Extrusion dies with zoned coatings, methods of fabricating such dies, and methods of manufacturing ceramic articles

A honeycomb extrusion die () with improved wear properties. Extrusion die has a die body () with inlet () and exit () faces, feedholes () with feedhole entrances (A) and outlets (B), and a plurality of die pins () having side surfaces () configured to define a matrix of intersecting slots (). At least some of the intersecting slots and die pins define a slot structure with divots () formed in the side surfaces of the die pins between the feedholes and the exit face, entrance slot portions between the feedhole outlets and the divots, the entrance slot portions having an entrance slot width W, and exit slot portions between the divots and the exit face, the exit slot portions having an exit slot width W, wherein W>Wover an entire slot length. Methods of manufacturing honeycomb structures using the honeycomb extrusion dies and of fabricating the extrusion dies are provided as are other aspects.

Honeycomb extrusion dies and methods of using and making same

Ceramic honeycomb bodies and methods for then manufacture are provided. The ceramic honeycomb body comprises a bulk density of less than 210 g/L, a geometric surface area (GSA) greater than 93 in(3.66 mm), a mechanical integrity factor (MIF) greater than 0.28%, and a back pressure factor (BPF) greater than 0.4 mm.

Low bulk density, high geometric surface area honeycomb bodies

A honeycomb body having a cutout, an assembly including the honeycomb body, and a method of manufacturing. The method includes forming the honeycomb body having a matrix of intersecting walls that define a plurality of cells and channels extending longitudinally through the honeycomb body. A subset of the channels are plugged to create a plurality of plugged cells in a reinforcement region of the honeycomb body. Material is removed from the honeycomb body within the reinforcement region in accordance with a peripheral shape that passes through the plugged cells to form a cutout that extends an axial depth into the honeycomb body.

Honeycomb body with a cutout portion and method of manufacturing same

Batch mixtures comprising alumina trihydrate for forming ceramic honeycomb bodies comprised of cordierite and methods of manufacturing honeycomb bodies from such batch mixtures are provided.

Ceramic honeycomb bodies and manufacture

An extrusion apparatus including a die and a mask are provided such that no slots feed directly into the longitudinal skin forming gap between the mask and the die. In a method of forming a die adapted to improve skin uniformity of extruded cellular ceramic substrates a slotted block of die material is provided including central slots adapted to form a cellular matrix of the substrate and peripheral slots located outwardly of the central slots designed to be covered by a skin former mask and adapted to extrude peripheral batch material. An arcuate skin former is cut corresponding to a target shrinkage so as to intersect the slotted block such that skin flow from tangent slots at 90 degree positions of the die is limited to the peripheral batch material.

Die assembly and method of extruding cellular ceramic substrates with a skin

Disclosed herein are methods for controlling and/or predicting the shrinkage and/or growth of a ceramic honeycomb structure between a green body state and a fired state by adjusting the hydrated alumina content of the batch composition. Also disclosed herein is substantially clay-free cordierite honeycombs produced in accordance with such methods.

Dimensional control of ceramic structures via composition

A method for doping silica soot with fluorine during laydown, including providing a bait rod, and providing a burner, wherein the burner emits a reactant flame. The method also including providing at least one first gas-feed separate from the burner, wherein the gas-feed supplies a first jet of fluorine-based gases, and depositing a layer of silica soot on the bait rod by vaporizing a silica producing gas within the reactant flame of the burner. The method further including supplying the first jet of fluorine-based gases to the silica soot deposited on to the bait rod via the first gas-feed subsequent to vaporizing at least a portion of the silica producing gas within the reactant flame of the burner.

Growing community of inventors

Canisteo, NY, United States of America

Michael James Lehman