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Impact of pore structure on the thermal conductivity of glass foams

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  • معلومة اضافية
    • بيانات النشر:
      Elsevier
    • الموضوع:
      2019
    • Collection:
      Imperial College London: Spiral
    • نبذة مختصرة :
      The thermal conductivity (λ) of glass foams is thought to depend on pore size. We report on the impact of pore size, determined using X-ray microtomography, and percentage porosity on the λ of glass foams. Glass foams were prepared by heating powder mixtures of obsolete cathode ray tube (CRT) panel glass, Mn3O4 and carbon as foaming agents, and K3PO4 as additive, to a suitable temperature above Tg, and subsequent cooling. Here, we report for the first time a correlation between λ and pore size in the range 0.10–0.16 mm showing a decrease from 57 to 49 mW m−1 K−1 with increasing the pore size for glass foams with porosities of 87–90%. This indicates that the pore structure should be optimized in order to improve the insulating performance of glass foams.
    • ISSN:
      0167-577X
    • Relation:
      Materials Letters; http://hdl.handle.net/10044/1/73729; https://doi.org/10.1016/j.matlet.2019.04.106
    • الرقم المعرف:
      10.1016/j.matlet.2019.04.106
    • الدخول الالكتروني :
      http://hdl.handle.net/10044/1/73729
      https://doi.org/10.1016/j.matlet.2019.04.106
    • Rights:
      © 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
    • الرقم المعرف:
      edsbas.F7A0F92B