无机材料学报2023，Vol.38Issue(11)：1257-1264,中插1-中插2,10.DOI:10.15541/jim20230153
无机酸铝体系氧化铝连续纤维的制备技术研究
Preparation of Alumina Ceramic Continuous Fibers with Inorganic Acidic Aluminum Sol as Precursor
摘要
Abstract
As a high-temperature-resistant structural reinforcement material with excellent performance,alumina continuous fiber has been widely used in various fields.However,its large-scale preparation is still a great challenge due to the technical difficulty.Herein,the alumina continuous fibers were prepared using self-made aluminum sol and commercially available silica sol as precursors,in which the microstructure and composition of aluminum sol were studied to reveal their excellent spinnability.Preparation of alumina-based gel continuous fibers with length longer than 1500 m was realized by Sol-Gel combined dry spinning technology.After calcination at 1100℃for 30 min,the continuous ceramic fiber composed of γ-Al2O3 and amorphous SiO2 with the diameter and mean tensile strength of 10 μm and 2.0 GPa was successfully obtained.Microstructure analyses revealed high relative density of the ceramic fibers,in which the γ-Al2O3 nanocrystals with size of 10-20 nm uniformly distributed in amorphous SiO2,resulting in excellent mechanical properties.This preparation process is environment-friendly,simple and controllable,showing great potential in practical application.The test for high temperature resistance revealed that the alumina continuous fiber can work for a long time at 1000℃while it can endure as high as 1300℃for a short-time service.关键词
氧化铝连续纤维/溶胶-凝胶法/铝溶胶/干法纺丝Key words
alumina ceramic continuous fibers/Sol-Gel technology/aluminum sol/dry spinning分类
通用工业技术引用本文复制引用
贾玉娜,曹旭,焦秀玲,陈代荣..无机酸铝体系氧化铝连续纤维的制备技术研究[J].无机材料学报,2023,38(11):1257-1264,中插1-中插2,10.基金项目
中国航天科技航天进入减速与着陆技术实验室开放基金(EDL9092122)Fund of Laboratory of Aerospace Entry,Descent and Landing Technology(EDL9092122) （EDL9092122）
