Basalt compositions having low glass transition temperature and high modulus for glass fiber applications
AssigneeCorning Incorporated
InventorsDane Alphanso Christie, Adam Robert Sarafian, Emily Kathryn Sarafian
Life of this patent
Estimating the term…
Abstract
A composition includes from 35 wt. % to 60 wt. % SiO2; from 7 wt. % to 20 wt. % Al2O3; from 7 wt. % to 24 wt. % iron oxides; from 8 wt. % to 20 wt. % CaO; from 1 wt. % to 5 wt. % alkali metal oxides; and from 0.5 wt. % to 12 wt. % B2O3 based on the total weight of the composition. Continuous basalt fibers having the composition exhibit low glass transition temperature and high modulus and are suitable for glass fiber applications.
Claims20
A composition comprising:
- from 35 wt. % to 60 wt. % SiO2;
- from 7 wt. % to 20 wt. % Al2O3;
- from 7 wt. % to 24 wt. % iron oxides;
- from 8 wt. % to 20 wt. % CaO;
- from 1 wt. % to 5 wt. % alkali metal oxides;
- and
- from 0.5 wt. % to 12 wt. % B2O3, wherein the weight percentages are based on the total weight of the composition.
A method of making a continuous basalt fiber, the method comprising combining from 75 wt. % to 99.5 wt. % basalt with from 0.5 wt. % to 25 wt. % colemanite to produce a batch composition;
- heating the batch composition to a forming temperature of from 1200° C. to 1400° C. to produce a melt;
- drawing a continuous strand from the melt;
- and cooling the continuous strand to produce the continuous basalt fiber.
Dependencies are inferred from the claim text.