Highly elastic coefficient glass fiber composites and their glass fibers and composites

摘要

The present invention provides a high elastic modulus fiberglass composition and glass fibers and composites thereof. The content of each component in the glass fiber composition is, in terms of weight percentage, 55.7-58.9% SiO _2, 15-19.9% Al ₂ O _3, 0.1-4.3% Y ₂ O ₃ , La ₂ O _3? 1.5%, CeO ₂ ≤1.2%, CaO6-10%, MgO9.05-9.95% , SrO≤2%, O≤0.99% Li 2 O + Na 2 O + K 2, Li 2 O≤0.65%, Fe 2 O 3 1% , TiO ₂ 0.1-1.5%, and the ratio of the weight percentage of C 1 = Y ₂ O ₃ / (Y ₂ O ₃ + La ₂ O ₃ + CeO ₂ ) is expressed as 0.6. This composition significantly improves the modulus of elasticity of the glass, significantly lowers the liquidus temperature and the molding temperature of the glass, greatly reduces the crystallization rate and the void ratio of the glass under the same conditions, and particularly reduces the glass transition temperature It is suitable for production.