| 摘要 |
PURPOSE:Inorganic fibers that contains, as major components, alumina and silica, further a specific amount of nickel oxide, thus showing improved strength and heat resistance so that no deterioration in physical properties takes place even in continuous use under high-temperature environments. CONSTITUTION:For example, a spinning dope containing an aluminum compound such as basic aluminum chloride, a silicon compound such as silica sol and a nickel compound such as nickel chloride in a dispersion form is extruded into fibers and the resultant fiber precursors are roasted to give the objective fibers which consist of 65-90wt% alumina, 8-33% silica and 0.2-7% nickel oxide where the total of the 3 components accounts for more than 98wt%. Further, a small amount of a water-soluble organic polymer such as PVA is preferably added to the dope in order to improve fiber-forming properties of the dope.
|
