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Novel Al2O3–SiO2 aerogel/porous zirconia composite with ultra-low thermal conductivity

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Abstract

Highly porous zirconia fibers networks with a quasi-layered microstructure were successfully fabricated using vacuum squeeze moulding. The effects of inorganic binder content on the microstructure, room-temperature thermal and mechanical properties of fibrous porous zirconia ceramics were systematically investigated. Al2O3–SiO2 aerogel was impregnated into fibrous porous ceramics, and the microstructures, thermal and mechanical properties of Al2O3–SiO2 aerogel/porous zirconia composites were also studied. Results show that the Al2O3–SiO2 aerogel/porous zirconia composites exhibited higher compressive strength (i.e., 1.22 MPa in the z direction) and lower thermal conductivity [i.e., 0.049 W/(m/K)]. This method provides an efficient way to prepare high-temperature thermal insulation materials.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (11672031 and 11472038), the Fundamental Research Fund for the Central Universities (Grant No. 2014RC047) and China Scholarship Council.

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Authors and Affiliations

  1. Department of Mechanics, School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China

    Rubing Zhang & Changshou Ye

  2. Institute for Infrastructure Engineering, Western Sydney University, Penrith, NSW, 2751, Australia

    Baolin Wang

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  1. Rubing Zhang
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  2. Changshou Ye
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  3. Baolin Wang
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Correspondence to Rubing Zhang.

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Zhang, R., Ye, C. & Wang, B. Novel Al2O3–SiO2 aerogel/porous zirconia composite with ultra-low thermal conductivity. J Porous Mater 25, 171–178 (2018). https://doi.org/10.1007/s10934-017-0430-1

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  • DOI: https://doi.org/10.1007/s10934-017-0430-1

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