Development of phosphate-based ceramic membranes. Final report
Goal was to develop microporous ceramic membranes by coating sols that contain nanoparticles onto porous ceramic supports. They could be used for either gas phase separations or liquid phase separations involving low molecular weight solutes. This required the synthesis of Sols containing particles in the range from 2 to 10 nm. Procedures for preparing nanoparticulate sols of silica, alumina, and aluminosilicates of various compositions are given. Unsupported ceramic membranes prepared from these sols had mean pore diameters of <10 {Angstrom} (silica), ca. 35 {Angstrom} (aluminosilicate). The alumina membranes display both microporosity (mean pore diameters <20 {Angstrom}) and mesoporosity (mean pore diameters >20 {Angstrom}). These nanoparticulate sols were deposited onto porous supports. Four methods of were investigated. Dip coating appeared to give the best performance of all of these techniques and was easily implemented. Deposition of particles within porous supports by permformation was also demonstrated. Critical point drying studies of membranes were initiated, but progress was limited. Slip casting could not be successfully used to produce a supported membrane free from cracks.
- Research Organization:
- Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG07-91ID13062
- OSTI ID:
- 10186324
- Report Number(s):
- DOE/ID/13062-T1; ON: DE93003285
- Resource Relation:
- Other Information: PBD: Nov 1992
- Country of Publication:
- United States
- Language:
- English
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ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
MEMBRANES
FABRICATION
SEPARATION EQUIPMENT
PROGRESS REPORT
CERAMICS
PHOSPHATES
SILICON OXIDES
ALUMINIUM OXIDES
ALUMINIUM SILICATES
SOLS
DEPOSITION
DRYING
SLIP CASTING
SUBSTRATES
DIP COATING
POROUS MATERIALS
POROSITY
MICROSTRUCTURE
400105
360601
SEPARATION PROCEDURES
PREPARATION AND MANUFACTURE