Corning Incorporated

Michael Henry Wasilewski

Kenneth Edward Hrdina

Daniel Raymond Sempolinski

Mahendra Kumar Misra

Raymond E Lindner

Steven Bruce Dawes

Dale Robert Powers

Richard Michael Fiacco

David G Grossman

Kamjula Pattabhirami Reddy

Robert Stephen Pavlik, Jr

John Edward Maxon

C Charles Yu

Robert E McLay

Christine E Heckle

Sinue Gomez

Lisa Anne Moore

Sergio Tsuda

Gregory Scott Glaesemann

John T Brown

Thomas Adam Collins

Chunhong Chelsie He

Michael S Dobbins

Frederick E Noll

Ivan A Cornejo

Merrill F Sproul

Nikki J Russo

Laura J Ball

Theodore R Kozlowski

J Mario Quintal

William P Peters

James E Maxon

Robert S Pavlik

Methods for separating strengthened glass articles from glass substrate sheets and strengthened glass substrate sheets are described herein. In one embodiment, a method of separating a glass article from a glass substrate sheet includes forming at least one groove on at least one surface of the glass substrate sheet. The at least one groove continuously extends around a perimeter of the glass article and extends partially through a thickness of the glass substrate sheet. The method further includes strengthening the glass substrate sheet by a strengthening process and separating the glass article from the glass substrate sheet along the at least one groove such that one or more edges of the glass article are under compressive stress. In another embodiment, a strengthened glass substrate sheet includes an ion exchanged glass having one or more grooves in one or more strengthened surface layers, the one or more grooves defining glass articles.

Methods for forming grooves and separating strengthened glass substrate sheets

The present invention provides doped titania-doped silica glass articles having low thermal expansions and low variations in thermal expansion. According to one embodiment of the invention, a titania-doped silica glass article has a titania content of between about 5 wt % and about 9 wt %; a coefficient of thermal expansion of between about &#x2212;30 ppb/&#xb0; C. and about +30 ppb/&#xb0; C. at a temperature between 15&#xb0; C. and 30&#xb0; C.; and a variation in coefficient of thermal expansion of less than about 5 ppb/&#xb0; C. at a temperature between 15&#xb0; C. and 30&#xb0; C.

Doped silica glass articles and methods of forming doped silica glass boules and articles

These glass bodies are light weight porous structures such as a boules of high purity fused silica (HPFS). More specifically, the porous structures are supports for HPFS mirror blanks. Porous glass is made utilizing flame deposition of pure silica or doped silica in a manner similar to the production of high purity fused silica. Bubbles or seeds are formed in the glass during laydown. Finely divided silicon carbide (SiC) particles are used to form the bubbles. At least one layer of porous glass is formed in the boule.

Light weight porous structure

Burners ( ) are used to make glass bodies ( ) from OMCTS. The burners have six concentric regions. Putting certain gases through the regions results in thicker bodies than can be achieved with existing techniques and with improved efficiency.

Burners for producing boules of fused silica glass

Burners and methods for producing fused silica members. The burner includes seven gas-emitting regions, including four regions for emitting a mixture of oxygen and combustible gas.

High heat capacity burners for producing fused silica boules

Methods and apparatus for adding metals such as aluminum to fused silica glass articles are disclosed. The methods and apparatus allow for controlled, low level addition of metals into fused silica glass articles. The fused silica glass articles containing added aluminum exhibit improved internal transmission and decreased absorption change when irradiated with a laser.

Method and apparatus for adding metals to fused silica

A metal article, in particular a component for a thermal cracking furnace, and a method of protecting the metal from exposure to carbon, the article having a protective coating that has a glass-ceramic surface and an interior having a CTE between that of the glass-ceramic and the metal.

Protective coating on metal

A method for forming a fused silica glass includes delivering a silica precursor to a burner and passing the silica precursor through the flame of the burner to form silica particles, depositing the silica particles on a planar surface to form a flat, porous preform, dehydrating the porous preform, and consolidating the porous preform into a flat, dense glass.

Method for producing fused silica and doped fused silica glass

These glass bodies are light weight porous structures such as a boules of high purity fused silica or ultra-low expansion glass. More specifically, the porous structures are supports for mirror blanks. Porous glass is made utilizing flame deposition of pure silica or doped silica in a manner similar to the production of high purity fused silica. Bubbles or seeds are formed in the glass during laydown. Several means of creating and controlling these seeds are available. The processes use incomplete combustion to create the bubbles. There are a number of different steps to create the incomplete combustion. One such step is a short distance between the hydrolysis flame and the glass precursor.

A method for preparing high-purity, bulk fused silica includes supplying silane gas, a gaseous fuel, and oxygen gas to a combustion burner. Silica particles are formed by passing the silane gas into a flame formed by the combustion reaction of the gaseous fuel with the oxygen gas while maintaining the ratio of the flow rate of the gaseous fuel to the flow rate of the silane gas no less than twelve and the ratio of the flow rate of the gaseous fuel to the flow rate of the oxygen gas no less than three. The silica particles formed are immediately deposited onto a hot bait to form a boule.

Method for producing bulk fused silica

In furnaces for producing high purity fused silica glass boules, glass particles have a tendency to build-up adjacent the burner hole rim. It was discovered that unburned furnace gases containing silica particles where re-circulated in the furnace close to the burner hole rim and reacted with the oxygen of infiltrated air adjacent the burner hole, and thus deposited such particles in the form of a glassy build-up about the rim of the burner hole. In order to eliminate the source of oxygen adjacent the burner hole rim, a curtain of an inert gas is caused to flow through the burner hole between the sidewalls of the burner hole and the flame of the burner. Accordingly, the curtain of inert gas inhibits the combustion of the unburned hydrogen and carbon monoxide furnace gases adjacent the exit rim of the burner hole and thereby minimizes glass build-up about the burner hole rim.

Method and apparatus for preventing burner-hole build-up in fused silica processes

A method and a burner for manufacturing silica-containing soot is disclosed. The method includes providing a liquid silicon-containing feedstock and a gas mixture and ejecting the liquid-gas mixture from an orifice into a combustion site to convert the silica-containing feedstock into silica containing soot. The burner includes a plurality of channels for delivering a gas to provide a flame, an effervescent atomizer for atomizing a liquid, silicon-containing feedstock and a rail for guiding the atomized liquid, silicon-containing feedstock into the burner flame. The method and burner can be used to produce silica-containing articles such as high purity fused silica optical members and waveguides.

Method and burner for forming silica-containing soot

An article of relatively pure silica, and a furnace and method of producing the article. The article is produced by collecting molten silica particles (,) in a refractory furnace in which at least a portion of the refractory has been exposed to a halogen-containing gas to react with contaminating metal ions in the refractory.

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Corning, NY, United States of America

Michael Henry Wasilewski