Organic and/or production method of the glass strand and the aforementioned strand which can strengthen the inorganic material and the composition which is used

摘要

As for this invention, constitution, mass % with regards the tempered glass fiber which is something which includes the component below, in the range below: SiO₂ =50 - 60%, desirably SiO₂ =52% and/or SiO₂ =57%, Al₂ O₃ =10 - 19%, desirably Al₂ O₃ =13% and/or Al₂ O₃ =17%, B₂ O₃ =16 - 25%, ZrO₂ =0.5 - 1.5%, Na₂ O=1.5%, desirably Na₂ O=0.8 and K₂ O=1.5%, desirably K₂ O=0.8 and R₂ O=2%, desirably R₂ O=1%, CaO=10%, MgO=10%, F=0 - 2%, TiO₂ =0 - 3%, RO=4 - 15%, desirably RO=6% and/or RO=10%, in addition =3% (here, R₂It is O=Na2O+K2O+Li2O, and RO=CaO+MgO). Induced electricity quality of the aforementioned glass composition especially is profitable in the MHz range and the GHz range.