Owens-corning Fiberglas Corporation

Darryl J Costin

Jay W Hinze

A bushing for use in the drawing of glass filaments to form glass fibers formed of a silicon-based ceramic having a plurality of openings extending therethrough and hollow tip elements formed of a precious metal extending through the openings in the bushing. In the preferred practice of the invention, the hollow tip element overlays a ceramic spacer element which serves to prevent reaction of the precious metal with the silicon-based ceramic.

Bushing and method for forming glass fibers

Platinum-rhodium alloys containing small amounts of boron and zirconium have low creep rates and high resistance to glass corrosion making the alloys particularly suitable for glass-fiberizing bushings.

Platinum-rhodium alloys

It has been discovered that refractories at their elevated use temperatures have electrical properties unique to semi-conductors. The electrical conductivity of refractories is changed by altering the defects in the metallic or nonmetallic ions of the refractory lattice, and the purity is controlled to prevent fluxing from occurring at the grain boundaries. The discovery makes possible either the increase or decrease in electrical conductivity of any semi-conducting refractory, since the theory is applicable to both materials wherein the defects occur in the metal ions of the refractory lattice and also to materials wherein the defects occur in the nonmetallic ions of the refractory lattice.

Refractories and methods of making same

Platinum-rhodium alloys having low creep rates

A cobalt-base alloy, particularly suitable for high temperature molten glass environments, and articles manufactured from the alloy, preferably by casting, are disclosed.

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Columbus, OH, United States of America

Darryl J Costin