| 摘要 |
The invention relates to a reinforcing glass fibre of the following composition with the limits given below in weight percentages:SiO50 to 60 %, preferably SiO≥ 52 % and/or SiO≤ 57 %; AlO- 10 to 19 %, preferably AlO≥ 13 % and/or AlO≤ 17 %; BO- 16 to 25 %; ZrO- 0.5 to 1.5 %; NaO = 1.5 %, preferably NaO ≤ 0.8; KO ≤ =1.5 %, preferably KO ≤ 0.8; RO ≤ 2 %, preferably RO ≤ 1 %; CaO ≤ 10 %; MgO ≤ 10 %; F - 0 to 2 %; TiO- 0 to 3 %; RO - 4 to 15 %, preferably RO ≥ 6 % and/or RO ≤ 10 %; various ≤ 3 %, where RO = NaO + KO + LiO, et RO = CaO + MgO. The dielectric properties of said glass compositions are particularly advantageous in the MHz and GHz ranges. |
