Abstract
Devitrification resistance is one of the most important properties of silica fibers. The devitrification behavior of silica fibers made by the acid leaching method, the sol-gel method, and the high-purity silica fusing method, and the effects of small amounts of Al2O3 and B2O3, were studied by using X-ray diffraction. The results indicated that the devitrification tendency of silica fibers made by the high-purity silica fusing method is apparently greater than that of the fibers made by the other two methods. A small amount of B2O3 has the effect of retarding devitrification, while Al2O3 promotes devitrification of the fibers. The combined effect of Al2O3 and B2O3 is to strongly enhance the devitrification of silica fibers. The results are discussed in the context of structural analysis.
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