Preparation of Continuous Aluminum Oxide Fibers with Silicon Oxide and Zirconium Oxide Additives

• Published in: Fibre chemistry 2020-03, Vol.51 (6), p.430-436
• Main Authors: Varrik, N. M., Zimichek, A. M., Sumin, A. V., Samorodova, O. N.
• Format: Article
• Language: English
• Subjects: Additives; Aluminum oxide; Ceramic fibers; Chemistry; Chemistry and Materials Science; Continuous fibers; Creep (materials); Crystallization; Fiber Composite Materials; Heat; Heat treatment; High temperature; Organic Chemistry; Phase composition; Polymer Sciences; Povidone; Silicon; Silicon dioxide; Silicon oxides; Tensile strength; Thermal conductivity; Thermal insulation; Yttrium oxide; Zirconium; Zirconium dioxide; Zirconium oxide; Zirconium oxides
• ISSN: 0015-0541; 1573-8493
• DOI: 10.1007/s10692-020-10127-4

Ceramic oxide fibers have low heat conductivity and high heat stability along with low density such that these materials are in demand for high-temperature thermal insulation. However, the creep of oxide fibers at high temperatures limits their use as composite components. We studied the crystallization of oxide fibers with the following compositions (in mass %): 1) 85% Al 3 O 3 + 15% SiO 2 , 2) 90% Al 2 O 3 + 10% SiO 2 , and 3) 95% Al 2 O 3 + 4% ZrO 2 + 1% Y 2 O 3 . The fibers were subjected to heat treatment at 700°, 900°, and 1280°C and we studied their phase composition and strength properties. The greatest tensile strength was found for the first fiber but all the samples showed a tendency for granule growth and loss of strength by the action of high temperatures. Further investigation required to explore possible use of other precursors and the effect of technological conditions on the formation and crystallization of such fibers.