Synthesis of high-temperature resistant monolithic zirconia-based aerogel via facile water glass assisted sol–gel method

Haibo Gao, Zhiyi Zhang, Zhenyu Shi, Jiazheng Zhang, Mingjia Zhi*, Zhanglian Hong

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

29 Citations (Scopus)

Abstract

Zirconia aerogel monolith was prepared by a facile co-hydrolysis method, which adopts ZrOCl2 as the precursor and water glass (Na2SiO3) as the gel initiator. ZrO2 aerogel was formed by rational controlling of the hydrolysis rate of Zr4+ ions by Na2SiO3. The obtained aerogel consists of ZrO2 nanoparticles surrounded by amorphous SiO2 nano shell. The density and the surface area can be well tuned by adjusting the ratio of ZrOCl2 to Na2SiO3. The in-situ introduced SiO2 nano shell layer acts as the particle boundary reinforcement phase, which not only strengths the ZrO2 particle connections to form monolith, but also significantly mitigates the sintering of ZrO2 nanoparticles at high temperature. As a result, the zirconia aerogel prepared by such method could maintain its nanoporous microstructure up to 1000 °C. [Figure not available: see fulltext.]. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
Original languageEnglish
Pages (from-to)567-573
JournalJournal of Sol-Gel Science and Technology
Volume85
Issue number3
DOIs
Publication statusPublished - 1 Mar 2018
Externally publishedYes

Bibliographical note

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Research Keywords

  • Aerogel
  • Sol–gel
  • Thermal insulation
  • Water glass
  • Zirconia

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