Glass compositions, glass fibers, and methods of inhibiting boron volatization from glass compositions
AssigneePPG Industries Ohio, Inc.
InventorHong Li
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Abstract
Embodiments of the present invention relate generally to fiberizable glass compositions comprising boron oxide at least one rare earth oxide in a molar ratio of rare earth oxide to boron oxide ranging from 0.01 to 0.33. Other embodiments of the present invention relate to methods of inhibiting boron volatization from glass compositions comprising boron oxide by adding a rare earth oxide to the glass composition before melting the glass compositions. Still other embodiments of the present invention relate to glass fibers formed from the fiberizable glass compositions of the present invention, and polymeric composites and printed circuit boards made therefrom.
Claims17
A fiberizable glass composition comprising,
- from 9 to 16 weight percent Al2O3;
- from 5 to 13 weight percent B2O3;
- from 16 to 25 weight percent CaO;
- 0 to 6 weight percent MgO;
- from 48 to 62 weight percent SiO2;
- 0 to 4 weight percent TiO2;
- and
- R2O3, wherein a molar ratio of R2O3 to B2O3 ranges from 0.01 to 0.33, and R is at least one rare earth element selected from the group consisting of Sc, Y, La, Nd, Sm, Eu, Gd, Er, and Lu.
Dependencies are inferred from the claim text.