| 摘要 |
PROBLEM TO BE SOLVED: To provide inorganic fiber which is soluble in pysiological salt water while maintaining heat resistance comfarable to that of alumina-silica fiber, and further has high solubility in pysiological salt water even after the application of heat history. SOLUTION: In the inorganic fiber containing MaO, SrO and SiO2 as essential components, a vacuum-formed preform of the same fiber exhibits the coefficient of linear contraction of <=3.5% before and after heating at 1,260 deg.C for 24 hr. The inorganic fiber contains, by weight, 70.0 to 88.5% SiO2 , 11.0 to 29.5% MgO, 0.5 to 15.0% SrO, 74.0 to 84.5% SiO2 , 11.0 to 25.5% MgO, and 0.5 to 15.0% SrO. Its solubility in pysiological salt water is >=1%, and the solubility in pysiological salt water is >=1% even after the fiber has heat history.
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