| 摘要 |
<p>Thermostable and biologically soluble man-made vitreous fibres obtainable from a melt having a low liquidus temperature and a low crystallisation rate comprising SiO2: 48-64 % by weight, Al2O3: 0.3-4 % by weight, FeO: 6-10 % by weight, CaO: 10-35 % by weight, MgO: 7-20 % by weight, Na2O: 0-10 % by weight, K2O: 0-6 % by weight, the ratio of (Na2O + K2O + 0.1.CaO) to (MgO + FeO) being > 0.15 and (MgO + FeO) being greater than 14 % by weight and (Na2 + K2O) being less than or equal to 10 % by weight.</p> |
