Al2O3-SiO2-B2O3连续纤维的制备及力学性能

doi:10.11896/cldb.20060207

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Abstract In the present work, alumina-based gel fibers were prepared through sol-gel method combined dry-spinning technology, which transformed to the continuous alumina ceramic fibers with the composition of 12.92wt% B₂O₃, 24.56wt% SiO₂ and 62.50wt% Al₂O₃ after calcination. Thermogravimetric-differential scanning calorimeter(TG-DSC), scanning electron microscope(SEM), transmission electron microscope(TEM), X-ray diffraction(XRD) and mechanical property analytical techniques were applied to investigate the microstructure of the sol precursor, the phase composition of the fibers, as well as the surface and internal structure of the fibers. The results indicate that the sol precursor prepared through the sol-gel method has excellent and stable spinability, and the gel fibers with the length longer than 1 000 m can be obtained by dry-spinning. After calcination, B-containing continuous alumina ceramic fibers with the uniform diameter of 14—15 μm were formed. With the calcination temperature of 1 000 ℃, the main crystalline phase in the fibers is mullite, whose tensile strength can reach up to 1.35 GPa. The as-prepared continuous alumina ceramic fibers have excellent mechanical properties, which show great potential in the field of thermal protection.

Key words： alumina-based continuous fibers boron oxide sol-gel method dry-spinning technique

Published: 03 August 2021

CLC number:

TB321

About author:: Yuna Jia received her M.S. degree in June 2010 from Shandong University in chemistry. She is currently a senior engineer in National Engineering Research Center for Colloidal materials, Shandong University, focusing on the research of preparation and property of alumina-based continuous fibers.
Dairong Chen received his Ph.D. degree in Inorganic Chemistry from Jilin University in 1997. He is currently a distinguished professor in Shandong University. His research interests are preparation, characterization and structure-function relationship of inorganic materials including nanocrystals and nanostructured fibers.

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	JIA Yuna
	LIANG Keke
	JIAO Xiuling
	CHEN Dairong
	ZHANG Jian
	LYU Yi
	ZHAO Yingmin

Cite this article:

JIA Yuna,LIANG Keke,JIAO Xiuling, et al. Preparation and Mechanical Properties of the Al₂O₃-SiO₂-B₂O₃ Continuous Fibers[J]. Materials Reports, 2021, 35(14): 14025-14029.

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http://www.mater-rep.com/EN/10.11896/cldb.20060207 OR http://www.mater-rep.com/EN/Y2021/V35/I14/14025

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