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[1]吴晓栋,邵高峰,吴君,等.无机铝盐法制备SiO2-Al2O3复合气凝胶隔热材料[J].南京工业大学学报(自然科学版),2016,38(02):7-14.[doi:10.3969/j.issn.1671-7627.2016.02.002]
 WU Xiaodong,SHAO Gaofeng,WU Jun,et al.Synthesis and characterization of SiO2-Al2O3 composite aerogel using inorganic aluminum salt as raw material[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(02):7-14.[doi:10.3969/j.issn.1671-7627.2016.02.002]
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无机铝盐法制备SiO2-Al2O3复合气凝胶隔热材料()
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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:
7-14
栏目:
出版日期:
2016-04-10

文章信息/Info

Title:
Synthesis and characterization of SiO2-Al2O3 composite aerogel using inorganic aluminum salt as raw material
文章编号:
1671-7627(2016)02-0007-08
作者:
吴晓栋12邵高峰12吴君12沈晓冬12崔升12王岭3
1.南京工业大学 材料科学与工程学院 材料化学工程国家重点实验室,江苏 南京 210009; 2.宿迁市南京工业大学新材料研究院,江苏 宿迁 223800; 3.中航复合材料有限公司 先进复合材料国防科技重点实验室,北京 101300
Author(s):
WU Xiaodong 12SHAO Gaofeng 12WU Jun 12SHEN Xiaodong 12CUI Sheng 12WANG Ling 3
1.State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Science and Engineering, Nanjing Tech University,Nanjing 210009,China; 2.Advanced Materials Institute, Nanjing Tech University in Suqian, Suqian 223800,China; 3.National Key Laboratory of Advanced Composite,AVIC Composite Co. Ltd.,Beijing 101300,China
关键词:
溶胶-凝胶 乙醇超临界干燥 SiO2-Al2O3复合气凝胶 勃姆石 孔结构
Keywords:
sol-gel C2H5OH supercritical fluid drying SiO2-Al2O3 composite aerogel boehmite pore structures
分类号:
TQ127.2
DOI:
10.3969/j.issn.1671-7627.2016.02.002
文献标志码:
A
摘要:
采用溶胶-凝胶法和乙醇超临界干燥工艺,以无机铝盐为原料,制备完整块状的SiO2-Al2O3复合气凝胶。通过傅里叶红外光谱仪(FT-IR)和X线衍射仪(XRD)研究气凝胶在热处理过程中物相结构的变化; 采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对气凝胶的表面形貌和组织结构进行观察; 采用N2吸附-脱附测试来研究热处理过程中气凝胶孔结构的变化。结果表明:SiO2-Al2O3复合气凝胶中SiO2相主要以无定形形式存在,而Al2O3相主要以针叶状或长条状的勃姆石多晶形式存在,当温度达到1 100 ℃时,复合气凝胶中开始产生莫来石相。随着热处理温度的升高,SiO2-Al2O3复合气凝胶的比表面积逐渐减小,直到1 000 ℃时,比表面积仍高达416.23 m2/g,同时高温热处理改善了气凝胶内部网络结构,使孔径分布更加均匀。
Abstract:
Monolithic SiO2-Al2O3 composite aerogel using inorganic aluminum salt as raw material was prepared by a sol-gel method,followed by C2H5OH supercritical fluid drying.The changes of phase structures during thermal treatment were characterized by Fourier transform infrared spectroscopy(FT-IR)and X-ray diffraction(XRD)technique.The micro-morphology and structures were investigated by scanning electron microscope(SEM)and transmission electron microscope(TEM).Nitrogen adsorption-desorption isotherm was used to investigate the changes of pore structures during the heating process.Results showed that SiO2 existed as amorphous state and Al2O3 mainly existed as boehmite consisited of fibrous particles and weblike microstructures.When the heat treatment temperature reached to 1 100 ℃,the mullite began to appear in the composite aerogel.The specific surface area decreased with the increase of thermal treatment temperature,but it remained 416.23 m2/g until 1 000 ℃.Heat treatment process improved the quality of the three-dimensional network in the aerogel,and the pore distribution became uniformity after heat treatment.

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备注/Memo

备注/Memo:
收稿日期:2015-03-19
基金项目:长江学者和创新团队发展计划(IRT_15R35); 江苏省科技支撑计划(工业)项目(BE2014128); 航空科学基金(201452T4001); 江苏省高校自然科学研究重大项目(15KJA430005); 江苏省产学研前瞻性联合研究项目(BY2015005-01); 江苏先进无机功能复合材料协同创新中心; 江苏高校优势学科建设工程; 江苏高校品牌专业建设工程
作者简介:吴晓栋(1991—),男,江苏南通人,博士生,主要研究方向为气凝胶基耐高温隔热材料; 沈晓冬(联系人),教授,E-mail:xdshen@njtech.edu.cn; 崔升(联系人),教授,E-mail:scui@njtech.edu.cn.
引用本文:吴晓栋,邵高峰,吴君,等.无机铝盐法制备SiO2-Al2O3复合气凝胶隔热材料[J].南京工业大学学报(自然科学版),2016,38(2):7-14..
更新日期/Last Update: 2016-03-20