Corning Glass Works

Bernard S Aronson

James A Murphy

Andrew Herczog

Peter P Bihuniak

Clifford L Hund

Marc S Giroux

Optical waveguide preforms and other glass articles produced by gas-drying and consolidating porous glass soot preforms are provided utilizing a consolidation method wherein consolidation proceeds from the drying gas inlet to the drying gas outlet end of the preform, this method resulting in more uniform water attenuation characteristics in the articles.

Process for drying optical waveguide preforms

A process for forming a solid tantalum capacitor is disclosed wherein the cathode is manganese dioxide formed by pyrolysis. The pyrolysis is performed in a nitrogen dioxide containing atmosphere at a temperature of between about 170.degree. C. and 250.degree. C., the nitrogen dioxide containing atmosphere comprising at least about 10% by volume of nitrogen dioxide, the remainder of said atmosphere being water vapor and gas inert in the pyrolysis process.

Process of forming a solid tantalum capacitor

A method of anodizing porous tantalum material suitable for making a porous tantalum capacitor pellet or slug having decreased current leakage is described. After a pellet is anodized at a maximum predetermined desired voltage, it is removed from the anodizing bath and heated to a temperature of between 150.degree. C. and 300.degree. C. The pellet is maintained at such temperature for at least three minutes and then returned to the anodizing bath, at least once, and subjected to more electrical current.

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Elmira, NY, United States of America

Bernard S Aronson