Glass fiber composition with improved biosolubility
AssigneeSchuller International, Inc.
InventorsJon F. Bauer, Kevin D. Schaal
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Abstract
Described is an inorganic fiber comprising silica dioxide, calcium oxide, and alkali oxide having a free energy of hydration greater than (more positive than) -5.00 kcal/mol, an enthalpy of formation less than (more than negative than) -210.0 kcal/mol, a dissolution rate in simulated extra cellular fluid greater than 750 (calculated as nanograms of fiber/per square centimeter of fiber surface area/per hour) having an average fiber diameter not greater than 4.5 micrometers. Also described is a method of manufacturing the fibers.
Claims2
Glass fiber composition comprising an inorganic fiber comprising silicon dioxide, calcium oxide, and alkali oxide having a free energy of hydration greater than (more positive than) -5.00 kcal/mol, a free energy of formation less than (more negative than) -210.0 kcal/mol, a dissolution rate in simulated extra cellular fluid greater than 750 (calculated as nanograms of fiber/per square centimeter of fiber surface area/per hour) and having an average fiber diameter not greater than 4.5 micrometers wherein the composition has the following components:
- ______________________________________ Silicon dioxide 50-70 mole % Calcium oxide 3-20 " Alkali oxide 5-20 " Boron oxide 3-15 " Zirconia 0.1-5 mole % 100% ______________________________________
Glass fiber composition comprising an inorganic fiber comprising silicon dioxide, calcium oxide, and alkali oxide having a free energy of hydration greater than (more positive than) -5.00 kcal/mol, a free energy formation less than (more negative than) -210.0 kcal/mol, a dissolution rate in simulated extra cellular fluid greater than 750 (calculated as nanograms of fiber/per square centimeter of fiber surface area/per hour) and having an average fiber diameter not greater than 4.5 micrometers wherein the composition is comprised of the following components:
- ______________________________________ Silicon dioxide 55-67 mole % Calcium oxide 5-13 mole % Alkali oxide 8-13 mole % Boron oxide 5-13 mole % Zirconia 1-2 mole % Aluminum oxide 0-2 mole % 100% ______________________________________
Dependencies are inferred from the claim text.