Highly compressible and anisotropic lamellar ceramic sponges with superior thermal insulation and acoustic absorption performances

Chao Jia, Lei Li, Ying Liu, Ben Fang, He Ding, Jianan Song, Yibo Liu, Kejia Xiang, Sen Lin, Ziwei Li, Wenjie Si, Bo Li, Xing Sheng, Dongze Wang, Xiaoding Wei () and Hui Wu ()
Additional contact information
Chao Jia: Tsinghua University
Lei Li: Tsinghua University
Ying Liu: Peking University
Ben Fang: Peking University
He Ding: Beijing Institute of Technology
Jianan Song: Tsinghua University
Yibo Liu: Tsinghua University
Kejia Xiang: Tsinghua University
Sen Lin: Tsinghua University
Ziwei Li: Tsinghua University
Wenjie Si: Tsinghua University
Bo Li: Tsinghua University
Xing Sheng: Tsinghua University
Dongze Wang: Tsinghua University
Xiaoding Wei: Peking University
Hui Wu: Tsinghua University

Nature Communications, 2020, vol. 11, issue 1, 1-13

Abstract: Abstract Advanced ceramic sponge materials with temperature-invariant high compressibility are urgently needed as thermal insulators, energy absorbers, catalyst carriers, and high temperature air filters. However, the application of ceramic sponge materials is severely limited due to their complex preparation process. Here, we present a facile method for large-scale fabrication of highly compressible, temperature resistant SiO2-Al2O3 composite ceramic sponges by blow spinning and subsequent calcination. We successfully produce anisotropic lamellar ceramic sponges with numerous stacked microfiber layers and density as low as 10 mg cm−3. The anisotropic lamellar ceramic sponges exhibit high compression fatigue resistance, strain-independent zero Poisson’s ratio, robust fire resistance, temperature-invariant compression resilience from −196 to 1000 °C, and excellent thermal insulation with a thermal conductivity as low as 0.034 W m−1 K−1. In addition, the lamellar structure also endows the ceramic sponges with excellent sound absorption properties, representing a promising alternative to existing thermal insulation and acoustic absorption materials.

Date: 2020
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DOI: 10.1038/s41467-020-17533-6

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