Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1986-06-20
1988-06-14
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
428406, 501 12, C03C 1200
Patent
active
047512032
ABSTRACT:
A process of manufacturing vitreous beads is disclosed in which feedstock particles of a glass-former composition containing less than 15% by dry weight of sodium and potassium calculated as their respective oxides and containing chemically bound water, are fed through a heating zone in which the particles are vitrified and spherulized and the resulting vitreous beads are cooled. The vitrifiable oxide forming elements of said glass-former composition may be chemically interlinked, and the feedstock may be prepared as a silica-based gel or precipitate having a composition suitable for vitrification into a glass of a desired composition which by virtue of its low alkali content is resistant to hydrolytic attack. By control of the cellulating agent content (bound water and optionally a gas evolving salt radical such as nitrate or sulphate) of the feedstock, and its granulometry, the relative proportions of solid and hollow beads which will be produced in a given spherulizing run can be controlled.
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Goelff Pierre
Toussaint Francois
Dixon Jr. William R.
Glaverbel
Griffis Andrew B.
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