Journal
MATERIALS LETTERS
Volume 229, Issue -, Pages 265-268Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.07.035
Keywords
Silica aerogels; Spray; Freeze drying; Thermal insulation; Thermal stability
Funding
- Anhui Programs for Science and Technology Development [1604a0902175]
- Fundamental Research Funds for the Central Universities [WK2320000035]
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In this study, silica aerogels were prepared using water-glass precursor based on two drying strategies, namely conventional freeze drying (C-FD) and spray freeze drying (S-FD). It was known that the pore structure of silica aerogel can be optimized uniformly based on S-FD method when tert-butyl alcohol is directly utilized as a solvent. As a result, silica aerogels obtained by the S-FD method are monolithic with high thermal stability and low thermal conductivity, showing a great potential of thermal insulation materials for high-temperature environment. (C) 2018 Published by Elsevier B.V.
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