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

摘要

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.