Al2O3-SiO2复合气凝胶的制备与表征

doi:10.11896/cldb.19040022

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Abstract In this paper, Al₂O₃-SiO₂ composite aerogels were prepared by vacuum freeze-drying method using hexahydrate aluminum chloride (AlCl₃·6H₂O) and tetraethyl orthosilicate (TEOS) as precursors. Scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM) were used to analyze the effects of Si content on the micromorphology structure and other properties of aerogels. FTIR analysis showed that after the introduction of silicon into the Al₂O₃ aerogels, the partial absorption peak of Al-OH structure disappeared and a large number of Al-O-Si structures appeared. When the ratio of Al to Si is 4:1, the specific surface area of the composite aerogel is still as high as 253 m²/g after 1 000 ℃ high temperature heat treatment. After heat treatment at 1 200 ℃ for 2 h, the XRD diagram showed that a large number of mullite phase diffraction peaks and no α-Al₂O₃ phase appear. The introduction of -Si group can inhibit the crystal transformation of Al₂O₃ and greatly improve the thermal stability of aerogels at high temperature.

Key words： Al₂O₃-SiO₂ composite aerogels vacuum freeze-drying thermal stability

Published: 31 July 2019

CLC number:

TB34

About author:: Huaxin Lireceived her engineering degree in materials science from Henan Polytechnic University in 2017. She is now a postgraduate student of the College of Materials Science and Opto-electronic Technology, Chinese Academy of Sciences (UCAS), under the gui-dance of Professor Xiang Junhui. At present, the main research area is functional materials.
Junhui Xiangreceived his Ph.D. degree in materials from Tsinghua University in February 2002.He is a professor in the University of Chinese Academy of Sciences (UCAS), mainly engaged in the research of functional nanomaterials, including the preparation, characterization and application of ultralight nanomaterials.

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	LI Huaxin
	CHEN Junyong
	YUE Xian
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Cite this article:

LI Huaxin,CHEN Junyong,YUE Xian, et al. Preparation and Characterization of Al₂O₃-SiO₂ Composite Aerogels[J]. Materials Reports, 2019, 33(18): 3170-3174.

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http://www.mater-rep.com/EN/10.11896/cldb.19040022 OR http://www.mater-rep.com/EN/Y2019/V33/I18/3170

[1]	Kistler S S. Nature, 1931, 127, 741.
[2]	Wang X B, Luan Z Q, Li K et al. Materials Review A: Review Papers, 2018, 32(7), 2214(in Chinese).王馨博, 栾志强, 李凯, 等. 材料导报:综述篇, 2018, 32(7), 2214.
[3]	Yoldas B E. American Ceramic Society Bulletin, 1975, 54(3), 289.
[4]	Poco J F, Satcher J H, Hrubesh L W. Journal of Non-Crystalline Solids, 2001, 285(1-3), 57.
[5]	Mizushima Y, Hori M. Journal of Materials Research, 1993, 8(11), 2992.
[6]	Wen P G, Chao X Y, Yuan W H, et al. Materials Review A: Review Papers, 2016, 30(8), 51(in Chinese).温培刚, 巢雄宇, 袁武华, 等. 材料导报:综述篇, 2016, 30(8), 51.
[7]	Alphonse P, Faure B. Microporous & Mesoporous Materials, 2014, 196, 191.
[8]	Ponthieu E, Grimblot J, Elaloui E, et al. Journal of Materials Chemistry, 1999, 3(3), 287.
[9]	Laudise R A, Johnson D W. Journal of Non-Crystalline Solids, 1986, 79(1), 155.
[10]	Hüsing N, Schubert U. Angewandte Chemie International Edition, 1998, 37(1-2), 22.
[11]	Abdelwahe W, Degobert G, Stainmesse S, et al. Advanced Drug Delivery Reviews, 2006, 58(15), 1688.
[12]	Yang M M, Zhao N F, Cui Y, et al. ACS Nano, 2017, 11(7), 6817.
[13]	Wu X D, Shao G F, Cui S, et al. Ceramics International, 2016, 42(1), 874.
[14]	Baumann T F, Gash A E, Chinn S C, et al. Chemistry of Materials, 2004, 17(2), 395.
[15]	Leventis N, Sotiriou-Leventis C, Zhang G H, et al. Nano Letters, 2002, 2(9), 957.
[16]	Janosovits U, Ziegler G, Scharf U, et al. Journal of Non-Crystalline So-lids, 1997, 210(1), 1.
[17]	Yang J F, Wang Q H, Wang T M, et al. Journal of Porous Materials, 2016, 24(4), 1.
[18]	Zu G Q, Shen J, Wei X Q, et al. Journal of Non-Crystalline Solids, 2011, 357(15), 2903.
[19]	Cao F C, Ren L L, Li X A. RSC Advances, 2015, 5(23), 18025.