Hydroetching of high surface area ceramics using moist supercritical fluids
Abstract
Aerogels having a high density of hydroxyl groups and a more uniform pore size with fewer bottlenecks are described. The aerogel is exposed to a mixture of a supercritical fluid and water, whereupon the aerogel forms a high density of hydroxyl groups. The process also relaxes the aerogel into a more open uniform internal structure, in a process referred to as hydroetching. The hydroetching process removes bottlenecks from the aerogels, and forms the hydrogels into more standard pore sizes while preserving their high surface area.
- Inventors:
- Issue Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1175112
- Patent Number(s):
- 6812259
- Application Number:
- 10/045,930
- Assignee:
- Battelle Memorial Institute (Richland, WA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Fryxell, Glen, and Zemanian, Thomas S. Hydroetching of high surface area ceramics using moist supercritical fluids. United States: N. p., 2004.
Web.
Fryxell, Glen, & Zemanian, Thomas S. Hydroetching of high surface area ceramics using moist supercritical fluids. United States.
Fryxell, Glen, and Zemanian, Thomas S. Tue .
"Hydroetching of high surface area ceramics using moist supercritical fluids". United States. https://www.osti.gov/servlets/purl/1175112.
@article{osti_1175112,
title = {Hydroetching of high surface area ceramics using moist supercritical fluids},
author = {Fryxell, Glen and Zemanian, Thomas S.},
abstractNote = {Aerogels having a high density of hydroxyl groups and a more uniform pore size with fewer bottlenecks are described. The aerogel is exposed to a mixture of a supercritical fluid and water, whereupon the aerogel forms a high density of hydroxyl groups. The process also relaxes the aerogel into a more open uniform internal structure, in a process referred to as hydroetching. The hydroetching process removes bottlenecks from the aerogels, and forms the hydrogels into more standard pore sizes while preserving their high surface area.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {11}
}
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