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Han Chaojiang, Ma Yongjun, Pei Chonghua, Zeng Min. Preparation and characterization of silica composite aerogels with broadband IR absorption[J]. Infrared and Laser Engineering, 2013, 42(4): 869-873.
Citation: Han Chaojiang, Ma Yongjun, Pei Chonghua, Zeng Min. Preparation and characterization of silica composite aerogels with broadband IR absorption[J]. Infrared and Laser Engineering, 2013, 42(4): 869-873.
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Preparation and characterization of silica composite aerogels with broadband IR absorption

  • 1.

    State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials,Southwest University of Science and Technology,Mianyang 621010,China;

  • 2.

    Analytic and Testing Center,Southwest University of Science and Technology,Mianyang 621010,China

  • Received Date: 2012-08-15
  • Rev Recd Date: 2012-09-13
  • Publish Date: 2013-04-25
  • The silicon aerogel substrate was prepared by a two-step base/acid catalyzed sol-gel process using tetraethoxysilane(TEOS) as silicon source and by freeze drying. By adding different content of triethylamine hydrochloride(TEAHCl) to the substrate during the aging process, composite aerogels with broadband absorption in mid-and far-infrared windows was prepared. The structure and property of composity aerogels were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), N2 physisorption at 77 K and Fourier-transform infrared spectroscopy(FT-IR). Results show that the triethylamine hydrochloride is crystallized adhering to the whole three-dimensional network of silicon aerogel. The silicon aerogel substrate has the specific surface area about 524.5 m2/g, total pore volume about 1.2 cm3/g and average pore diameter about 9.2 nm. The composite aerogels have the specific surface area about 37.93-138.7 m2/g, total pore volume about 0.08-0.28 cm3/g and average pore diameter about 7.1-8.8 nm. The apparent density of silicon aerogel substrate and composite aerogels are 0.25 g/cm3 and 0.35-0.51 g/cm3 respectively. The composite aerogels have the characteristic of broadband absorption in mid-and far-infrared windows. The relative absorption intensity in mid-infrared window increased in proportion with the increase of TEAHCl.
  • [1]
    [2] Chen Xiuhong, Wei Heli, Xu Qingshan. Infrared atomospheric transmittance calculation model[J]. Infrared and Laser Engineering, 2011, 40(5): 811-816. (in Chinese)陈秀红, 魏合理, 徐青山. 红外大气透过率的计算模式[J].红外与激光工程, 2011, 40(5): 811-816.
    [3] Fu Wei. Principle and application technology of IR stealth
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  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Preparation and characterization of silica composite aerogels with broadband IR absorption

  • 1. State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials,Southwest University of Science and Technology,Mianyang 621010,China;
  • 2. Analytic and Testing Center,Southwest University of Science and Technology,Mianyang 621010,China
  • Received Date: 2012-08-15
  • Rev Recd Date: 2012-09-13
  • Publish Date: 2013-04-25

Abstract: The silicon aerogel substrate was prepared by a two-step base/acid catalyzed sol-gel process using tetraethoxysilane(TEOS) as silicon source and by freeze drying. By adding different content of triethylamine hydrochloride(TEAHCl) to the substrate during the aging process, composite aerogels with broadband absorption in mid-and far-infrared windows was prepared. The structure and property of composity aerogels were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), N2 physisorption at 77 K and Fourier-transform infrared spectroscopy(FT-IR). Results show that the triethylamine hydrochloride is crystallized adhering to the whole three-dimensional network of silicon aerogel. The silicon aerogel substrate has the specific surface area about 524.5 m2/g, total pore volume about 1.2 cm3/g and average pore diameter about 9.2 nm. The composite aerogels have the specific surface area about 37.93-138.7 m2/g, total pore volume about 0.08-0.28 cm3/g and average pore diameter about 7.1-8.8 nm. The apparent density of silicon aerogel substrate and composite aerogels are 0.25 g/cm3 and 0.35-0.51 g/cm3 respectively. The composite aerogels have the characteristic of broadband absorption in mid-and far-infrared windows. The relative absorption intensity in mid-infrared window increased in proportion with the increase of TEAHCl.

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