Lanxide Technology Company, LP

Other

Isonics Corporation

Paul V Kelsey

Marc S Newkirk

Christopher R Kennedy

Adam J Gesing

Michael A Rocazella

Alvin P Gerk

Daniel J Frydrych

Robert A Wolffe

The invention is directed to a method of producing polycrystaline silicon metal from a silicon halide plasma source. The silicon halide is split into silicon and halide ions in an inductively coupled plasma and silicon ions are then condensed to form molten silicon metal that can be vacuum cast into polysilicon ingots. The halide ions are separated and recycled into silicon halide gas over a silicon dioxide bed. In this way, high grade polysilicon is produced without a metallurgical grade silicon precursor and the process these processes consumes the byproducts in a continuous manner madding it less expensive than traditional methods of producing polysilicon and more environmentally friendly.

Plasma production of polycrystalline silicon

The invention is directed to luminescent materials containing isotopically-enriched atomic elements and methods of making these luminescent materials. Individual embodiments of the invention include isotopically-enriched ZnO:Zn, ZnS:Cu:Cl, ZnSiO:Mn, YOS:Eu, GdOS:Tb and CaWOphosphors as well as methods of synthesizing these luminescent materials using isotopically-enriched starting materials.

Isotopically enriched luminescent materials and methods of making same

The invention comprises a method of making self-supporting ceramic and ceramic composite structures by the oxidation reaction of a body of molten parent metal precursor with a vapor-phase oxidant to form an oxidation reaction product. This reaction or growth is continued to form a thick, self-supporting ceramic or ceramic composite body. The body is recovered and in a separate subsequent operation, at least a portion of a surface is coated with one or more materials in order to effect desired changes in the properties of the surface, e.g., hardness, corrosion resistance.

Production of ceramic and ceramic-metal composite articles with surface

This invention relates generally to a novel method of preparing self-supporting bodies, and to novel products made thereby. In its more specific aspects, this invention relates to a method of producing self-supporting bodies comprising one or more boron-containing compounds, e.g., a boride or a boride and a carbide, by reactive infiltration of a molten parent metal actinide into (1) a bed or mass containing boron carbide and, optionally, (2) at least one of a boron donor material (i.e., a boron-containing material) and a carbon donor material (i.e., a carbon-containing material), (3) a bed or mass comprising a mixture of a boron donor material and a carbon donor material and, optionally, (4) one or more inert fillers in any of the above masses, to form the body.

Growing community of inventors

Wilmington, DE, United States of America

Paul V Kelsey