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  • 1
    Electronic Resource
    Electronic Resource
    Sintering Aerogels (1998)
    Springer
    Journal of sol gel science and technology 13 (1998), S. 937-943 
    Details
    ISSN: 1573-4846
    Keywords: sintering ; aerogel ; pore size distribution ; viscosity ; characterization (of aerogels)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Studies of the densification kinetics and structural evolution of non-crystalline aerogels during sintering are examined in light of theory. In most respects, the theory of viscous sintering is capable of quantitatively accounting for the experimentally observed behavior, as long as the initial pore size distribution is known. Unfortunately, it is difficult to obtain adequate structural information; in particular, measurements using nitrogen desorption and thermoporometry often erroneously indicate the presence of macroporosity. Some authors have claimed that large pores contract more quickly than small pores during sintering; under certain circumstances this is predicted by the theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008687610326
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  • 2
    Electronic Resource
    Electronic Resource
    Mechanical Strength Evolution from Aerogels to Silica Glass (1997)
    Springer
    Journal of porous materials 4 (1997), S. 211-217 
    Details
    ISSN: 1573-4854
    Keywords: aerogel ; mechanical properties ; sintering ; model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The mechanical strength of silica aerogels and partially densified silica aerogels are investigated. This material allows the study of properties over a great range of porosity (0–95%). The experiments are performed in tension using a bending test. The mechanical strength increases by a 4 orders of magnitude over the whole range of porosity. The results are analyzed using two geometrical models (spheres and cylinder models) which account for the mean porosity properties of the materials and allows the mechanical strength evolution from aerogels to silica glass to be modelled.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009671118838
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    Paper (German National Licenses)
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