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[1]吴宇,沈军,祖国庆,等.耐高温Al2O3基气凝胶的制备和特性研究[J].南京工业大学学报(自然科学版),2016,38(02):15-19.[doi:10.3969/j.issn.1671-7627.2016.02.003]
 WU Yu,SHEN Jun,ZU Guoqing,et al.Synthesis and properties of high-temperature resistant alumina-based aerogels[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(02):15-19.[doi:10.3969/j.issn.1671-7627.2016.02.003]
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耐高温Al2O3基气凝胶的制备和特性研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年02期
页码:
15-19
栏目:
出版日期:
2016-04-10

文章信息/Info

Title:
Synthesis and properties of high-temperature resistant alumina-based aerogels
文章编号:
1671-7627(2016)02-0015-05
作者:
吴宇沈军祖国庆邹丽萍邹文兵关大勇
同济大学 波耳固体物理研究所 上海市特殊人工微结构材料与技术重点实验室,上海 200092
Author(s):
WU YuSHEN JunZU GuoqingZOU LipingZOU WenbingGUAN Dayong
Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Pohl Institute of Solid State Physics,Tongji University,Shanghai 200092,China
关键词:
超临界修饰 Al2O3气凝胶 耐高温 纤维复合
Keywords:
supercritical modification alumina aerogels thermal stability fiber composition
分类号:
TB321
DOI:
10.3969/j.issn.1671-7627.2016.02.003
文献标志码:
A
摘要:
以仲丁醇铝为前驱体,盐酸为催化剂,采用溶胶-凝胶法再经过超临界修饰和干燥,制备出块体Al2O3气凝胶。将莫来石纤维跟Al2O3溶胶混合,用同样的方法制备出纤维复合Al2O3气凝胶。用场发射扫描电子显微镜(FESEM)、热分析仪、孔径分布仪和X线衍射仪(XRD)表征Al2O3气凝胶及复合样品的结构和热学性能。结果表明:经过超临界修饰的Al2O3气凝胶具有更高的结晶度和耐温性能,并通过与莫来石纤维复合,其力学强度得到了有效的提高。
Abstract:
monolithic alumina aerogels were prepared by a sol-gel method combined with the ethanol supercritical drying and modification technique using alumina tri-sec butoxide and hydrochloric acid as the precursor and the catalyst respectively.Fiber composite alumina aerogels were prepared with the same method.The micro-structure and thermal properties of the alumina-based aerogels were characterized by field emission scanning electron microscope(FESEM),thermal analyzer, pore size distribution analyzer, and X-ray diffraction(XRD). Results showed that the alumina aerogels prepared by the supercritical modification had higher crystallinity and thermal stability, thus their mechanical strength was effectively improved by compositing with fiber.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-10-20
基金项目:国家科技支撑计划(2013BAJ01B01); 国家自然科学基金(51172163)
作者简介:吴宇(1991—),男,重庆开县人,博士生,主要研究方向为气凝胶的制备与性能; 沈军(联系人),教授,E-mail:shenjun67@tongji.edu.cn.
引用本文:吴宇,沈军,祖国庆,等.耐高温Al2O3基气凝胶的制备和特性研究[J].南京工业大学学报(自然科学版),2016,38(2):15-19..
更新日期/Last Update: 2016-03-20