Advanced Lighting Technologies, Inc.

United States of America as Represented by the Secretary of the Air Force

University of Dayton

Chakrapani Varanasi

Paul N Barnes

Timothy R Brumleve

Abbas Lamouri

Tryggvi Emilsson

Milan Polak

Ajaypal Naruka

An AC-tolerant high temperature superconductor tape with transposed filaments having two layers of high temperature superconducting material with striations and corresponding filaments and an insulating layer positioned therebetween.

AC-tolerant HTS coated conductor with transposed filaments

Nanometer-sized non-superconducting particulates in superconductive REBCO films, where RE is a rare earth metal, for flux pinning enhancement and a method of forming are disclosed. A target with a second phase material sector portion and a superconductive material portion is used in a pulse laser deposition process to form films on substrates according to the present invention. The films consist of 10-20 nm-sized precipitates. In a 0.5 &#x3bc;m thick film, a transport critical current density (J)&#x3e;3 MA/cmat 77K in self-field was measured. In one embodiment, magnetization Jat 77 K and 65K showed significant improvements in a composite YBCO films with fine precipitates produced according to the present invention as compared to non-doped (standard) YBCO films (&#x3e;10 times increase at 9 T, 65 K).

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A metal halide lamp having a high pressure quartz arc tube in which the electrodes are non-thoriated.

Dopant-free tungsten electrodes in metal halide lamps

The present invention includes barrier coatings and methods for reducing or preventing chemical reaction between the discharge medium and arc tube wall material in discharge lamps. The barrier coatings comprise nitride layer exposed to the discharge medium formed from one or more of aluminum, boron, scandium, yttrium, or the lanthanides. In another aspect, the present invention includes methods of forming coatings on the inner wall of arc tubes by introducing two or more precursors into the arc tube chamber and pyrolitically reacting the precursors to form layers for the coating.

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Dayton, OH, United States of America

Chakrapani Varanasi