Abstract
This work is devoted to the production of flexible continuous ceramic fibers based on refractory aluminum and silicon oxides using the Sol-gel method. The processes of transition of water-soluble components of the precursor solution to the oxide form during primary firing of gelified fibers are studied. Structural and phase transformations in fibers under high-temperature heating are examined. The sequence of phase transitions from the amorphous state to the crystal stable phase of α-Al2O3 is shown. The dependence of the mechanical properties of oxide fiber samples on the firing temperature is studied. The conditions for obtaining flexible fibers for textile processing into thrown-twisted heat-resistant yarns are determined. A batch of yarns has been made with additional introduction of organic yarns to protect oxide fibers. The article shows the possibility of manufacturing flexible high-temperature insulation from oxide fibers in the form of a braid for sealing cords and current conductors.
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