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Double-negative-index ceramic aerogels for thermal superinsulation.
Xu, Xiang; Zhang, Qiangqiang; Hao, Menglong; Hu, Yuan; Lin, Zhaoyang; Peng, Lele; Wang, Tao; Ren, Xuexin; Wang, Chen; Zhao, Zipeng; Wan, Chengzhang; Fei, Huilong; Wang, Lei; Zhu, Jian; Sun, Hongtao; Chen, Wenli; Du, Tao; Deng, Biwei; Cheng, Gary J; Shakir, Imran; Dames, Chris; Fisher, Timothy S; Zhang, Xiang; Li, Hui; Huang, Yu; Duan, Xiangfeng.
Afiliação
  • Xu X; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Zhang Q; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, P. R. China.
  • Hao M; College of Civil Engineering and Mechanics, Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Lanzhou 730000, P. R. China.
  • Hu Y; Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.
  • Lin Z; Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, P. R. China.
  • Peng L; Department of Mechanical and Aerospace Engineering and California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
  • Wang T; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Ren X; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Wang C; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Zhao Z; Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.
  • Wan C; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
  • Fei H; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
  • Wang L; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Zhu J; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Sun H; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
  • Chen W; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
  • Du T; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Deng B; Department of Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
  • Cheng GJ; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, P. R. China.
  • Shakir I; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, P. R. China.
  • Dames C; School of Industrial Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Fisher TS; School of Industrial Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Zhang X; Sustainable Energy Technologies Centre, College of Engineering, King Saud University, Riyadh, Kingdom of Saudi Arabia.
  • Li H; Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.
  • Huang Y; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
  • Duan X; Department of Mechanical and Aerospace Engineering and California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
Science ; 363(6428): 723-727, 2019 02 15.
Article em En | MEDLINE | ID: mdl-30765563
ABSTRACT
Ceramic aerogels are attractive for thermal insulation but plagued by poor mechanical stability and degradation under thermal shock. In this study, we designed and synthesized hyperbolic architectured ceramic aerogels with nanolayered double-pane walls with a negative Poisson's ratio (-0.25) and a negative linear thermal expansion coefficient (-1.8 × 10-6 per °C). Our aerogels display robust mechanical and thermal stability and feature ultralow densities down to ~0.1 milligram per cubic centimeter, superelasticity up to 95%, and near-zero strength loss after sharp thermal shocks (275°C per second) or intense thermal stress at 1400°C, as well as ultralow thermal conductivity in vacuum [~2.4 milliwatts per meter-kelvin (mW/m·K)] and in air (~20 mW/m·K). This robust material system is ideal for thermal superinsulation under extreme conditions, such as those encountered by spacecraft.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article