Development of phosphate-based ceramic membranes. Final report

Technical Report · Sun Nov 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/10186324· OSTI ID:10186324

Anderson, M A; Zeltner, W A; Hill, Jr, C G

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: Wisconsin Univ., 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
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105
ALUMINIUM OXIDES
ALUMINIUM SILICATES
CERAMICS
DEPOSITION
DIP COATING
DRYING
FABRICATION
MEMBRANES
MICROSTRUCTURE
PHOSPHATES
POROSITY
POROUS MATERIALS
PREPARATION AND MANUFACTURE
PROGRESS REPORT
SEPARATION EQUIPMENT
SEPARATION PROCEDURES
SILICON OXIDES
SLIP CASTING
SOLS
SUBSTRATES