| 摘要 |
PURPOSE:To obtain the titled fiber suitable as bulk useful as filler for high- temperature insulation such as furnace wall, ceiling, truck, etc., of various ceramic industry furnaces, having <=a fixed value of shot content in fiber state, consisting of silica and alumina. Here shot means unfibrous material and mainly consists of grain with >=40muphi or <5 aspect ratio. CONSTITUTION:A fiber composition 7 consisting essentially of silica and alumina is melted or softened by a container 6 in a furnace, dropped from a thin hole nozzle 5 in the furnace upon a rotator turning at high speed and made into fibers to give the aimed ceramic fibers having <=20wt% shot content. The composition of the silica and alumina is preferably 45-65wt% silica and 55-35wt% alumina.
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