TEMPERATURE-RESISTANT ALUMINOSILICATE GLASS FIBERS AND METHOD FOR THE PRODUCTION THEREOF AND USE THEREOF

摘要

The present invention relates to temperature-resistant aluminosilicate glass fibers having the following composition: 52-60% by weight SiO2, 12-16% by weight Al2O3, <0.4% by weight Fe2O3, 0.03-0.3% by weight Na2O, 0.3-0.7% by weight K2O, 18-24% by weight CaO, 0.4-0.8% by weight MgO, 1-5% by weight TiO2, 0.5-3% by weight BaO, 0-2% by weight SrO, 0-3% by weight ZrO2, 0-1% by weight CuO, the total proportion of the alkaline earth metal oxides together being a maximum of 1.0% by weight, the total proportion of the oxides SrO, CuO, ZrO2 being in a range of 0.1 to 4.0% by weight and the temperature-resistant aluminosilicate glass fibers having a transformation temperature of >760° C. and a fiber formation temperature of <1260° C., preferably ≦1230° C.

主权项

1. A temperature-resistant alumosilicate glass fiber, comprising:52-60 wt. %SiO2,14-16 wt. %Al2O3,<0.4 wt. %Fe2O3,0.03-0.3 wt. %Na2O,0.3-0.7 wt. %K2O,20-22wt. %CaO,0.4-0.8 wt. %MgO,1-5 wt. %TiO2,0.5-3 wt. %BaO,0-2 wt. %Sro,0-3 wt. %ZrO2, and0-1 wt. %CuO, wherein a total fraction of Na2O and K2O is at most 1.0 wt. %, wherein a total fraction of SrO, CuO, and ZrO2 lies in a range of 0.1 to 4.0 wt. %, wherein the temperature-resistant alumosilicate glass fiber has a transformation temperature >760° C. and a fiber formation temperature at a glass melt viscosity of 103.0 dPa·s of <1260° C., and wherein a remaining residual strength of the glass fiber with a diameter of from 9 to 15 μm after a temperature stress of 760° C. is in a range of 10% to 15% compared to an initial tear strength at room temperature.