| 摘要 |
The invention concerns a mineral fibre having the following composition in % by weight: SiO2 50-60, A12O3 1-6, MgO 16-22, CaO 12-18, Na2O+K2O 0-3, Fe2 O31-8, P2O5 1-6, other 0-3, whereby the weight ratio CaO/MgO<1 and the sum CaO+MgO=30-38% by weight. |
