Corning Incorporated

Corning Glass Works

United States of America As Represented by the Administrator of Nasa

Other

Nanoprecision Products, Inc.

Airflow Catalyst Systems, Inc.

Suresh Thakordas Gulati

Robert Anthony Schaut

Natesan Venkataraman

Timothy James Kiczenski

Michael Thomas Gallagher

Jerry C Summers

Donald M Oglesby

Jeffrey D Jordan

David R Schryer

Anthony Neal Watkins

Balram Suman

Bradley D Leighty

Anton A Spycher

Patricia P Davis

Jacqueline L Schryer

William H Dumbaugh, Jr

Josef C Lapp

Michael K Barnoski

Sujanto Widjaja

Henry Edwin Hagy

William Robert Powell

Robert W Pfitzenmaier

George W Scherer

Asish Ghosh

King-Fu Hii

David Inscho Wilcox

Donald Keck

R Ryan Vallance

Norman A Smith

Jose C Lapp

Jose Lapp

A method of making a glass sheet comprises laminating a high CTE core glass to a low CTE clad glass at high temperatures and allowing the laminate to cool creating compressive stress in the clad glass, and then ion exchanging the laminate to increase the compressive stress in the outer near surface regions of the clad glass. The core glass may include ions that exchange with ion in the clad glass to increase the compressive stress in inner surface regions of the clad glass adjacent to the clad glass/core glass interfaces. The glass laminate may be formed and laminated using a fusion forming and laminating process and fusion formable and ion exchangeable glass compositions.

Laminated and ion-exchanged strengthened glass laminates

A strengthened glass article has opposing first and second compressively stressed surface portions bound to a tensilely stressed core portion, with the first surface portion having a higher level of compressive surface stress than the second surface portion for improved resistance to surface damage, the compressively stressed surface portions being provided by lamination, ion-exchange, thermal tempering, or combinations thereof to control the stress profiles and limit the fracture energies of the articles.

Damage-resistant glass articles and method

A method of making a glass sheet () comprises laminating a high CTE core glass () to a low CTE clad glass () at high temperatures and allowing the laminate () to cool creating compressive stress in the clad glass (), and then ion exchanging the laminate () to increase the compressive stress in the outer near surface regions of the clad glass (). The core glass () may include ions that exchange with ion in the clad glass () to increase the compressive stress in inner surface regions of the clad glass () adjacent to the clad glass/core glass interfaces. The glass laminate () may be formed and laminated using a fusion forming and laminating process and fusion formable and ion exchangeable glass compositions.

Axial tension is applied to an optical fiber that had been scored at the intended cleave location, wherein the axial tension is applied in a time-varying manner to maintain the stress intensity factor for crack on the fiber within an acceptable level to produce a stable crack growth at a reasonable rate to cleave the fiber without requiring polishing of the end surface. Careful control of the applied tension force with time acts to control the velocity of the propagating crack by maintaining substantially constant stress intensity factor. The applied axial tension force is reduced with time and/or crack growth (as crack propagates). As a result, the strain energy in the fiber material is released by formation of a single plane with an optical quality surface without requiring polishing. A substantially flat optical surface of enhanced optical quality is formed at the cleaved end of the optical fiber.

Deterministic cleave of optical fiber

The invention described herein involves a novel approach to the production of oxidation/reduction catalytic systems. The present invention serves to stabilize the tin oxide reducible metal-oxide coating by co-incorporating at least another metal-oxide species, such as zirconium. In one embodiment, a third metal-oxide species is incorporated, selected from the group consisting of cerium, lanthanum, hafnium, and ruthenium. The incorporation of the additional metal oxide components serves to stabilize the active tin-oxide layer in the catalytic process during high-temperature operation in a reducing environment (e.g., automobile exhaust). Moreover, the additional metal oxides are active components due to their oxygen-retention capabilities. Together, these features provide a mechanism to extend the range of operation of the tin-oxide-based catalyst system for automotive applications, while maintaining the existing advantages.

Methodology for the effective stabilization of tin-oxide-based oxidation/reduction catalysts

Stabilized tin-oxide-based oxidation/reduction catalysts

Thin-walled ceramic honeycomb products of improved resistance to isostatic pressure damage are provided wherein the skin layers disposed over the cellular matrix portions of the honeycombs are formed of ceramic materials differing from the materials of the matrix as to composition, density, or other physical parameters effective to increase the elastic modulus of the skin layer relative to the cellular matrix and thereby reduce pressure-induced tangential strain in regions of the matrix adjacent to the skin layers.

High-strength thin-walled honeycombs

A glass laminate substrate for electronic substrates, such as flat panel displays, includes a transparent glass core bounded by transparent glass skin layers, wherein the coefficient of thermal expansion of the core is greater than the coefficient of thermal expansion of the skin layers thereby forming a residual compressive stress in the skin layers and a residual tensile stress in the core. The relative thickness of the skin layers can be selected to enhance the strength of the glass laminate substrate while maintaining a sufficiently low residual tensile stress in the core to allow scribing and separating of the substrate to size. Interlayers can be located between the core and the skin layers, wherein the interlayers include a residual compressive stress, and produce a reduced residual tensile stress in the core.

Glass laminate substrate having enhanced impact and static loading resistance

A tin-oxide based three-way catalytic material employing precious metals that is stable at exhaust gas temperatures of internal combustion engines when the tin oxide lattice includes any of several rare earth oxide stabilizers in the lanthanide series. The rare-earth elements are the 15 lanthanide elements with atomic numbers 57 through 71 that are in Group IIIA of the Periodic Table: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium. Such tin-oxide based catalytic materials may also beneficially include zirconium oxide and/or yttrium oxide. The invention is useful in providing three-way catalytic exhaust converters for internal combustion engines.

Tin oxide exhaust catalyst supports and catalysts stable at high temperatures

A burner nozzle having a hot face, side surfaces, and a plurality of internal gas flow passages and comprising a plurality of slits oriented in at least two different directions, wherein a selected number of the slits are formed in the hot face and/or side surfaces. The optimized location and depth of the slits relieve stresses that arise from temperature differences within the burner nozzle, caused by operation in high temperature furnaces, thereby extending the life (time to failure by fracture) of the burner nozzle.

Refractory burner nozzle with stress relief slits

A glass envelope for a cathode ray tube ( ) and a method of production. The envelope comprises ( ) a panel member having a thickness (t) that is defined by an equation which involves net tensile stress; wherein the panel having a net tensile stress not exceeding 1150 psi, having a surface compression induced during panel manufacture, and having an implosion protection band ( ) shrink-fitted around a skirt ( ) on the panel that augments surface compression in the panel ( ), whereby the panel thickness is substantially less than that of a corresponding untreated tube envelope.

Implosion-resistant cathode ray tube envelope

The present invention is directed to glasses exhibiting annealing points between 682.degree.-702.degree. C., linear coefficients of thermal expansion (25.degree.-300.degree. C.) between 57-59.times.10.sup.-7 /.degree. C., and excellent resistance to attack by HCl and Na.sub.2 CO.sub.3 consisting essentially, in weight percent, of

Glass for laminated glass articles

Growing community of inventors

Elmira, NY, United States of America

Suresh Thakordas Gulati