Development of phosphate-based ceramic membranes

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

DOI:https://doi.org/10.2172/7164518· OSTI ID:7164518

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: Univ. of Wisconsin, Madison, WI (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG07-91ID13062
• OSTI ID: 7164518
• Report Number(s): DOE/ID/13062-T1; ON: DE93003285
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
MEMBRANES
FABRICATION
SEPARATION EQUIPMENT
ALUMINIUM OXIDES
ALUMINIUM SILICATES
CERAMICS
DEPOSITION
DIP COATING
DRYING
MICROSTRUCTURE
PHOSPHATES
POROSITY
POROUS MATERIALS
PROGRESS REPORT
SILICON OXIDES
SLIP CASTING
SOLS
SUBSTRATES
ALUMINIUM COMPOUNDS
CASTING
CHALCOGENIDES
COLLOIDS
CRYSTAL STRUCTURE
DISPERSIONS
DOCUMENT TYPES
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
SILICATES
SILICON COMPOUNDS
SURFACE COATING
400105* - Separation Procedures
360601 - Other Materials- Preparation &amp; Manufacture