Corning Glass Works

Joseph F Mach

Richard Orr Maschmeyer

Gordon F Foster

Robert W Eolin

Kishor Purushottam Gadkaree

Dale R Wexell

James E Flannery

Roger F Bartholomew

Che-Kuang Wu

Shih-Lu Chen

Whisker-reinforced ceramic matrix composites comprising a principal crystal phase selected from the group of anorthite, barium-stuffed cordierite, and mixed cordierite/anorthite are prepared by extrusion of extrudable ceramic batches comprising an extrusion vehicle and a solids component consisting essentially of inorganic whiskers and powdered glass, the glass being a thermally crystallizable glass containing an internal nucleant and capable of being consolidated at ambient pressures or above to a dense consolidated preform which may be converted to a substantially glass-free whisker-reinforced ceramic matrix composite by thermal treatment.

Method for making extruded whisker-reinforced ceramic matrix composites

The present invention is concerned with the preparation of hydraulic cements, demonstrating high mechanical strength, long term resistance to attack by moisture, and virtual freedom from creep, from glass powders consisting essentially, expressed in terms of mole percent on the oxide basis, of about 60-76% SiO.sub.2, 15-30% K.sub.2 O, and 2-15% total of at least one metal oxide selected from the group of 0-10% Al.sub.2 O.sub.3, 0-5% V.sub.2 O.sub.5, 0-5% TiO.sub.2, 0-5% MoO.sub.3 and 0-5% WO.sub.3. The cements exhibit particular utility in forming strong cellular ceramic articles. The glass powders may contain a phosphate component in which case the composition ranges are limited to 68-76% SiO.sub.2, 18-24% K.sub.2 O, 2-4.5% P.sub.2 O.sub.5 with the molar ratio K.sub.2 O:P.sub.2 O.sub.5 ranging between 5 and 10, and 2-5% total of at least one metal oxide selected from the group of Al.sub.2 O.sub.3, MoO.sub.3, V.sub.2 O.sub.5 and WO.sub.3.

Hydraulic cements prepared from glass powders

This invention relates to a process for injection molding hydrosilicate glasses and apparati useful therefor. This invention is also concerned with apparati for mixing hydrosilicate glasses while in the fluid stage, i.e., when the hydrosilicate glasses have a viscosity between about 10.sup.2 -10.sup.9 poises. Finally, this invention describes materials demonstrating ready release of hydrosilicate glasses after contact in fluid form.

Mixing and injection molding hydrosilicates

This invention is concerned with the preparation of glass articles containing silver ions which exhibit thermoplastic properties and may, optionally, demonstrate photosensitivity to ultraviolet radiation. Such articles are produced through the exchange of Ag.sup.+ ions for Na.sup.+ and/or K.sup.+ ions in a hydrated Na.sub.2 O and/or K.sub.2 O--SiO.sub.2 glass. The articles will demonstrate photosensitivity when the compositions thereof also contain halide ions.

Method for making silver-containing glasses exhibiting thermoplastic

This invention relates to a process for injection molding hydrosilicate glasses and apparati useful therefor. This invention is also concerned with apparati for mixing hydrosilicate glasses while in the fluid state, i.e., when the hydrosilicate glasses have a viscosity between about 10.sup.2 -10.sup.9 poises. Finally, this invention describes materials demonstrating ready release of hydrosilicate glasses after contact in fluid form.

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Corning, NY, United States of America

Joseph F Mach