The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.
Nanoengineering Super Heat-Resistant, Strong Alumina Aerogels
Abstract
Because of ultralow thermal conductivity, excellent catalytic activity, and better heat resistance than silica aerogel, alumina-based aerogel has drawn great interest as thermal insulators and catalysts. However, it is too fragile and sinters above 1000 °C (it shrinks drastically, >50%, and leaves the surface area as low as 10–70 m 2 /g at 1300 °C), which badly limits its high-temperature applications. Herein, super heat-resistant, strong alumina aerogels are prepared via a novel acetone-aniline in situ water formation (ISWF) method combined with novel modification techniques: supercritical fluid modification (SCFM) and hexamethyldisilazane gas phase modification. The heat resistance of alumina aerogel is enhanced up to 1300 °C via this method. The shrinkage of the optimized alumina aerogel is reduced to as low as 1 and 5% and the corresponding surface area reaches up to 152–261 and 125–136 m 2 /g after being heated to 1200 and 1300 °C for 2 h, respectively. The strength is significantly increased by more than 120% through SCFM. It also exhibits excellent thermal insulation properties at temperatures up to 1300 °C. This may significantly contribute to their practical ultrahigh-temperature applications in thermal insulations, catalysts, catalyst supports, etc.
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Metadata
- Authors
- Zu, G., Shen, J., Zou, L., Wang, W., Lian, Y., Zhang, Z., & Du, A.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-11-22
- Volume
- 25
- Issue
- 23
- Pages
- 4757-4764
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2324079482
- Cited by
- 264
- References
- 31
- FWCI
- 3.57
- Type
- journal article
- Language
- en
- Open access
- closed
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