The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 1988
Filed:
Jul. 28, 1986
Thomas P O'Holleran, Chelsea, MI (US);
KMS Fusion, Inc., Ann Arbor, MI (US);
Abstract
A process for fabrication of refractory insulating materials wherein essentially pure silica shells are mixed with a polymeric graphite precursor dissolved in a solvent. The resulting slurry is placed in a forming mold, and the solvent is evaporated to form a polymeric matrix containing the shells as a dispersion. This matrix is pyrolized under an inert or reducing atmosphere to decompose the polymer and form a first product consisting essentially of a carbon matrix containing a dispersion of silica shells. To enhance refractory characteristics, such first product is fired at high temperature in an inert or reducing atmosphere to form a second product consisting of a carbon matrix containing a dispersion of SiC-lined voids, or in a nitrogen atmosphere to form a third product consisting of the carbon matrix containing a dispersion of Si.sub.3 N.sub.4 -lined voids.