Back to results
US 2010/0105537 A1Published application
Extruded Glass Structures and Methods for Manufacturing the Same
AssigneeCorning Incorporated
InventorsNicholas Francis Borrelli, David John McEnroe, Elizabeth Marie Vileno
Life of this patent
Estimating the term…
Abstract
Methods for preparing glass structures include extruding a glass precursor, the glass precursor having a composition in the range of 55%-75% SiO2, 5%-10% Na2O, 20%-35% B2O3 and 0%-5% Al2O3, and heat treating and leaching the glass precursor to yield a glass article comprising at least about 90% SiO2 by weight. Glass articles can be used to manufacture a variety of geometrically complex structures.
Claims20
A glass article made by the following process:
- providing a glass precursor having a composition, expressed in terms of
- weight percentage on an oxide basis, consisting essentially of:
- 55%-75% SiO2;
- 5%-10% Na2O;
- 20%-35% B2O3;
- and
- 0%-5% Al2O3;
- extruding the glass precursor;
- causing phase-separation in the glass precursor by a heat treatment;
- leaching the glass precursor to obtain a porous glass article comprising at least 90% by weight of silica;
- and
- optionally heating the porous glass article such that the pores collapse to form a densified glass article.
9 more elements
A method for preparing a glass article comprising:
- providing a glass precursor having a composition, expressed in terms of weight percentage on an oxide basis, consisting essentially of:
- 55%-75% SiO2;
- 5%-10% Na2O;
- 20%-35% B2O3;
- and
- 0%-5% Al2O3;
- extruding the glass precursor;
- causing phase-separation in the glass precursor by a heat treatment;
- and
- leaching the glass precursor to obtain a porous glass article comprising at least 90% by weight of silica.
7 more elements
Dependencies are inferred from the claim text.