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Journal of Advanced Ceramics

, Volume 7, Issue 4, pp 307–316 | Cite as

A study of morphological properties of SiO2 aerogels obtained at different temperatures

  • Jin-jun Liao
  • Peng-zhao Gao
  • Lin Xu
  • Jian Feng
Open Access
Research Article
  • 57 Downloads

Abstract

In this paper, temperature dependence of nanoporous framework evolution process and variety of pore properties (pore volume, specific surface area (BET), and pore size) of SiO2 aerogels were characterized by FTIR, XPS, XRD, SEM, TEM, BET, BJH, etc. Results show that SiO2 aerogels treated at different temperatures all possess amorphous structure. With the increase of treated temperatures, BET values of SiO2 aerogels increase initially and then decrease, and it reaches the maximum value of 882.81 m2/g when treated at 600 °C for 2 h due to the addition of the nanopores and shrinkage skeleton of SiO2 aerogels. Higher temperatures may result in a framework transformation and particle growth; both factors could reduce the BET values of the aerogels. Nanoporous skeleton of SiO2 aerogels at room temperatures is composed of tetrahedron with a pore size of about 22.28 nm. Higher treated temperatures result in an increase of octahedron amount in nanoporous framework and a decrease of pore size. When treated at 1000 °C, an approximate dense SiO2 bulk via the framework collapse and particle growth is obtained. These varieties are derived from the formed extra bonds of Si–O–Si, higher local stress, and liquid phase between particles during heat treatment process.

Keywords

silica aerogel temperature dependence nanoporous framework evolution pore properties 

References

  1. [1]
    Gao QF. Nano-porous silica, alumina aerogels and thermal super-insulation composites. Ph.D. Thesis. Changsha, China: National University of Defense Technology, 2009. (in Chinese)Google Scholar
  2. [2]
    Rueda M, Sanz-Moral LM, Nieto-Márquez A, et al. Production of silica aerogel microparticles loaded with ammonia borane by batch and semicontinuous supercritical drying techniques. J Supercrit Fluid 2014, 92: 299–310.CrossRefGoogle Scholar
  3. [3]
    Lu G, Wang X-D, Duan Y-Y, et al. Effects of non-ideal structures and high temperatures on the insulation properties of aerogel-based composite materials. J Non-Cryst Solids 2011, 357: 3822–3839.CrossRefGoogle Scholar
  4. [4]
    Li M, Jiang H, Xu D, et al. Low density and hydrophobic silica aerogels dried under ambient pressure using a new co-precursor method. J Non-Cryst Solids 2016, 452: 187–193.CrossRefGoogle Scholar
  5. [5]
    Tang X, Sun A, Chu C, et al. A novel silica nanowire-silica composite aerogels dried at ambient pressure. Mater Design 2017, 115: 415–421.CrossRefGoogle Scholar
  6. [6]
    Li XW, Duan YY, Wang XD. Impacts of structural changes of SiO2 aerogel under high temperature on its insulation performance. J Therm Sci Tech 2011, 10: 189–193.Google Scholar
  7. [7]
    Maleki H, Durães L, Portugal A. A new trend for development of mechanical robust hybrid silica aerogels. Mater Lett 2016, 179: 206–209.CrossRefGoogle Scholar
  8. [8]
    Lu Z, Yuan Z, Liu Q, et al. Multi-scale simulation of the tensile properties of fiber-reinforced silica aerogel composites. Mat Sci Eng A 2015, 625: 278–287.CrossRefGoogle Scholar
  9. [9]
    Kim C-Y, Lee J-K, Kim B-I. Synthesis and pore analysis of aerogel-glass fiber composites by ambient drying method. Colloid Surf A 2008, 313–314: 179–182.CrossRefGoogle Scholar
  10. [10]
    Wu H, Liao Y, Ding Y, et al. Engineering thermal and mechanical properties of multilayer aligned fiber-reinforced aerogel composites. Heat Transfer Eng 2014, 35: 1061–1070.CrossRefGoogle Scholar
  11. [11]
    Fenech J, Viazzi C, Bonino J-P, et al. Morphology and structure of YSZ powders: Comparison between xerogel and aerogel. Ceram Int 2009, 35: 3427–3433.CrossRefGoogle Scholar
  12. [12]
    Reichenauer G, Heinemann U, Ebert H-P. Relationship between pore size and the gas pressure dependence of the gaseous thermal conductivity. Colloid Surf A 2007, 300: 204–210.CrossRefGoogle Scholar
  13. [13]
    Zhou CL, Yang J, Sui XY, et al. Impacts of structural change of SiO2 aerogel under different time and high temperature conditions on insulation performance. Adv Ceram 2014, 5: 11–16.Google Scholar
  14. [14]
    Huang D, Guo C, Zhang M, et al. Characteristics of nanoporous silica aerogel under high temperature from 950 to 1200 Mater Design 2017, 129: 82–90.Google Scholar
  15. [15]
    Olivi-Tran N, Jullien R. Numerical simulations of aerogel sintering. Phys Rev B 1995, 52: 258.CrossRefGoogle Scholar
  16. [16]
    Chu P, Liu H, Li Y, et al. Syntheses of SiC–TiO2 hybird aerogel via supercritical drying combined PDCs route. Ceram Int 2016, 42: 17053–17058.CrossRefGoogle Scholar
  17. [17]
    Rao AV, Hegde ND, Hirashima H. Absorption and desorption of organic liquids in elastic superhydrophobic silica aerogels. J Colloid Interface Sci 2007, 305: 124–132.CrossRefGoogle Scholar
  18. [18]
    Zhang Z, Scherer GW. Supercritical drying of cementitious materials. Cement Concrete Res 2017, 99: 137–154.CrossRefGoogle Scholar
  19. [19]
    Shao Z, Luo F, Cheng X, et al. Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying. Mater Chem Phys 2013, 141: 570–575.CrossRefGoogle Scholar
  20. [20]
    Saeed S, Soubaihi RMA, White LS, et al. Rapid fabrication of cross-linked silica aerogel by laser induced gelation. Microporous Mesoporous Mater 2016, 221: 245–252.CrossRefGoogle Scholar
  21. [21]
    García-Torres BA, Aguilar-Elguezabal A, Román-Aguirre M, et al. Synthesis of silica aerogels microspheres prepared by ink jet printing and dried at ambient pressure without surface hydrophobization. Mater Chem Phys 2016, 172: 32–38.CrossRefGoogle Scholar
  22. [22]
    Shahzamain M, Bagheri R, Masoomi M. Synthesis of silica-polybutadiene hybrid aerogel: The effects of reaction conditions on physical and mechanical properties. J Non-Cryst Solids 2016, 452: 325–335.CrossRefGoogle Scholar
  23. [23]
    Sutka A, Pärna R, Mezinskis G, et al. Effects of Co ion addition and annealing conditions on nickel ferrite gas response. Sensor Actuat B: Chem 2014, 192: 173–180.CrossRefGoogle Scholar
  24. [24]
    Barba A, Clausell C, Nuño L, et al. ZnO and CuO crystal precipitation in sintering Cu-doped Ni–Zn ferrites. II. Influence of sintering temperature and sintering time. J Eur Ceram Soc 2017, 37: 169–177.Google Scholar
  25. [25]
    Nocun M, Cholewa-Kowalska K, Łączka M. Structure of hybrids based on TEOS-cyclic forms of siloxane system. J Mol Struct 2009, 938: 24–28.CrossRefGoogle Scholar
  26. [26]
    Wang H, Wu Q, Cao D, et al. Synthesis of SnSb-embedded carbon–silica fibers via electrospinning: Effect of TEOS on structural evolutions and electrochemical properties. Mater Today 2016, 1–2: 24–32.Google Scholar
  27. [27]
    Yang J, Chen J. Surface free energy and surface structure of methyl-modified silica membranes. J Mater Eng 2008, 10: 177–182.Google Scholar
  28. [28]
    Kim N-H, Ko P-J, Seo Y-J, et al. Improvement of TEOS-chemical mechanical polishing performance by control of slurry temperature. Microelectron Eng 2006, 83: 286–292.CrossRefGoogle Scholar
  29. [29]
    Li Z, Gong L, Li C, et al. Silica aerogel/aramid pulp composites with improved mechanical and thermal properties. J Non-Cryst Solids 2016, 454: 1–7.CrossRefGoogle Scholar
  30. [30]
    He S, Huang D, Bi H, et al. Synthesis and characterization of silica aerogels dried under ambient pressure bed on water glass. J Non-Cryst Solids 2015, 410: 58–64.CrossRefGoogle Scholar
  31. [31]
    Sing KSW, Williams RT. Physisorption hysteresis loops and the characterization of nanoporous materials. Adsorpt Sci Technol 2004, 22: 773–782.CrossRefGoogle Scholar
  32. [32]
    Shi C, Zhang S, Jiang Y, et al. High temperature properties of silica aerogel. Rare Metal Mat Eng 2016, 45: 210–213.Google Scholar
  33. [33]
    Wagh PB, Pajonk GM, Haranath D, et al. Influence of temperature on the physical properties of citric acid catalyzed TEOS silica aerogels. Mater Chem Phys 1997, 50: 76–81.CrossRefGoogle Scholar
  34. [34]
    Li Z-H, Gong Y-J, Pu M, et al. Determination of structure of SiO2 colloidal particle by SAXS. Chin J Inorg Chem 2003, 19: 252–256.Google Scholar
  35. [35]
    Morales-Flórez V, Rosa-Fox NDL, Piñero M, et al. The cluster model: A simulation of the aerogel structure as a hierarchically-ordered arrangement of randomly packed spheres. J Sol-Gel Sci Technol 2005, 35: 203–210.CrossRefGoogle Scholar
  36. [36]
    Kuczynski GC. Sintering Processes. Now York, 1979.Google Scholar

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© The Author(s) 2018

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (https://doi.org/creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Jin-jun Liao
    • 1
  • Peng-zhao Gao
    • 1
  • Lin Xu
    • 2
  • Jian Feng
    • 2
  1. 1.College of Materials Science and EngineeringHunan UniversityChangshaChina
  2. 2.Key Laboratory of New Ceramic Fibers and CompositesNational University of Defense TechnologyChangshaChina

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