Method of enhancing the refractoriness of high purity fused silica
AssigneeCorning Glass Works
InventorsPeter P. Bihuniak, Donald L. Guile
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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 aluminum and/or titanium oxide, preferably in conjunction with elemental silicon.
Claims13
In an improved method of producing a high purity fused silica product, wherein a liquid flowable form of a silica slurry or sol 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 the silica containing liquid with 10 to 1000 parts per million by weight, as based on the fused silica, of aluminum and/or titanium oxide calculated on the metal basis.
A method for producing a high purity fused silica product which comprises the steps of doping a liquid flowable form of silica slurry or sol with 10 to 1000 parts per million by weight, as based on the fused silica, of aluminum and/or titanium oxide, calculated on the metal basis, drying the doped source of silica to rigid silica fragments containing the doping oxide, calcining the silica fragments at about 1150.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 a silica slurry or sol with 10 to 1000 parts per million by weight, as based on the fused silica, of aluminum and/or titanium oxide, calculated on the metal basis, drying the oxide 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.