High modulus glass fiber composites and their glass fibers and composites

摘要

The present invention provides a high modulus glass fiber composition and a glass fiber and a composite material thereof. Among them, the content of each component is as follows in terms of% by weight, that is, SiO ₂ is 53-68%, Al ₂ O ₃ is 13-24.5%, Y ₂ O ₃ + La ₂ O ₃ is 0.1-8% La ₂ O ₃ is less than 1.8%, CaO + MgO + SrO is 10-23%, Li ₂ O + Na ₂ O + K ₂ O is less than 2%, Fe ₂ O ₃ is less than 1.5% , and a range of% by weight in proportion _{C1 = Y 2 O 3 / (} Y 2 O 3 + La 2 O 3) is greater than 0.5. The composition can greatly improve the modulus of elasticity of the glass, significantly lower the liquidus temperature and the molding temperature, greatly lower the crystallization rate and the void ratio of the glass under the same conditions, and effectively improve the glass hardening time , Making it particularly suitable for the tank-milled production of high modulus glass fibers of low void fraction.