Method of enhancing the refractoriness of high purity fused silica
AssigneeCorning Glass Works
InventorsCharles E. Baumgartner, Peter P. Bihuniak
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Abstract
A method is disclosed wherein high purity fused silica is produced from a liquid flowable form of a silica slurry or sol and the refractoriness of the fused silica is enhanced by homogeneously doping the silica with elemental silicon.
Claims6
In a method of producing a high purity fused silica product, wherein a liquid containing silica is dried to form solid silica bodies which are then thermally vitrified, the improvement, whereby the refractoriness of the fused silica is enhanced, which comprises doping a liquid flowable form of silica slurry or sol with 200 to 2500 parts per million by weight, as based on the fused silica, of elemental silicon.
A method of producing a high purity fused silica product which comprises the steps of doping a liquid flowable form of silica slurry or sol with 200 to 2500 ppm by weight, as based on the fused silica, of elemental silicon, drying the silicon doped source of silica to rigid silica fragments containing dispersed silicon, calcining the silica fragments at about 1000.degree.-1500.degree. C., and then firing said silica fragments to a fused silica product.
A method of enhancing the refractoriness of a fused silica product which comprises doping a liquid flowable form of silica slurry or sol with 200 to 2500 ppm by weight, as based on the fused silica, of elemental silicon, drying the silicon doped source of silica to form solid silica bodies, and firing said silica bodies to a fused silica product.
Dependencies are inferred from the claim text.