Global Tungsten & Powders Corp.

Osram Sylvania Inc.

David C Sheppeck

Chen-Wen Fan

Dale E Benjamin

Tuan A Dang

Frank A Schwab

Joan M Coveleskie

James N Christini

Thomas R Pinkowski

Jeffrey A Eckert

An electroluminescent (EL) phosphor is described wherein each individual phosphor particle is encapsulated in an inorganic coating, preferably aluminum oxyhydroxide. The encapsulated phosphor shows an extreme insensitivity to atmospheric moisture and suffers only minor loss of initial brightness in lamps. The method of applying the coating is a hybrid process, which involves EL phosphor particles first being coated with a thin inorganic film using an atomic layer deposition (ALD) method in a fluidized bed wherein the precursors are introduced sequentially in repeated cycles, subsequently followed by an additional coating layer applied by a chemical vapor deposition (CVD) method in which the precursors are introduced simultaneously.

Moisture resistant electroluminescent phosphor with high initial brightness and method of making

The present invention is an electroluminescent phosphor wherein each individual phosphor particle is encapsulated in an inorganic coating applied by an atomic layer deposition (ALD) coating method. In a preferred embodiment, the coating is aluminum oxyhydroxide. The encapsulated phosphor shows an extreme insensitivity to atmospheric moisture and suffers only minor loss of initial brightness in lamps.

Moisture-resistant electroluminescent phosphor with high initial brightness and method of making

A method is provided for producing molybdenum metal powders having consistently high tap densities. The method involves doping an ammonium molybdate solution with a soluble potassium compound, forming an ammonium dimolybdate precipitate and reducing the precipitate to form a metal powder.

Method for increasing tap density of molybdenum powder

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Sayre, PA, United States of America

David C Sheppeck