Use of MgO, ZnO, and rare earth oxides for making improved low dielectric fibers with improved low thermal expansion coefficient for high boron aluminosilicate compositions
AssigneeElectric Glass Fiber America, LLC
InventorHong Li
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Abstract
New glass compositions and applications thereof are disclosed. A glass composition as described herein can include 50 to 55 weight percent SiO2, 17 to 26 weight percent B2O3, 13 to 19 weight percent Al2O3, 0 to 8.5 weight percent MgO, 0 to 7.5 weight percent ZnO, 0 to 6 weight percent CaO, 0 to 1.5 weight percent Li2O, 0 to 1.5 weight percent F2, 0 to 1 weight percent Na2O, 0 to 1 weight percent Fe2O3, 0 to 1 weight percent TiO2, and 0 to 8 weight percent of other constituents. Also described herein are glass fibers formed from such compositions, composites, and articles of manufacture comprising the glass compositions and/or glass fibers.
Claims20
A glass composition suitable for fiber forming comprising:
- SiO2 in an amount from 50 to 55 weight percent;
- B2O3 in an amount from 17 to 26 weight percent;
- Al2O3 in an amount from 13 to 19 weight percent;
- MgO in an amount from 0 to 8.5 weight percent;
- ZnO in an amount from 0 to 7.5 weight percent;
- CaO in an amount from 0 to 6 weight percent;
- Li2O in an amount from 0 to 1.5 weight percent;
- F2 in an amount from 0 to 1.5 weight percent;
- Na2O in an amount from 0 to 1 weight percent;
- Fe2O3 in an amount from 0 to 1 weight percent;
- TiO2 in an amount from 0 to 1 weight percent;
- CeO2 in an amount less than 0.2 weight percent;
- and
- BaO in an amount less than 0.1 weight percent.
Dependencies are inferred from the claim text.