| abstract |
The artificial mineral fiber product is formed from a mixture of oxides having a weight composition: 36 to 55% SiO2, 15 to 30% Al2O3, 3 to 30% CaO, 5 to 20% MgO, 4 to 15% FeO, 1 to 12% Na2O + K2O, up to 6% TiO2 and up to 15% of other elements, where the ratio of Si4 + to Si4 + + Al3 + in the oxide mixture is up to 0,67, the viscosity of the oxide mixture at liquidus temperature is higher than 30 Pa.a 1300 ° C, the mineral fiber dissolution rate at pH 4.5 is at least 20 nm per day. Also described are two methods of making the article of the invention |