Sol-gel preparation of zirconium oxide

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:126512

Ko, E I ^[1]

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1. Carnegie Mellon Univ., Pittsburgh, PA (United States)

Preparing catalytic materials via the sol-gel route offers the ability to control product properties by changing the so-called sol-gel parameters in any of the processing steps. Some of these parameters are the type of precursor, acid and water content, temperature, solvent, and drying conditions. For example, we have prepared aerogels that are precursors to zirconium oxide by starting with either a metal alkoxide or preformed sols. The properties of the calcined oxides, in term of surface area, pore characteristics, and crystal structure, vary significantly with the starting material. The removal of solvent from aerogels with supercritical drying leads to aerogels, the properties of which are also dependent on synthetic parameters such as the amounts of acid and water used. Finally, drying temperature itself offers another level of control over the same physical properties. We will discuss these observations in terms of the underlying sol-gel chemistry.

• OSTI ID: 126512
• Report Number(s): CONF-950402--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATALYSTS
CRYSTAL STRUCTURE
MICROSTRUCTURE
PHYSICAL PROPERTIES
PRECURSOR
SOL-GEL PROCESS
SURFACE AREA
ZIRCONIUM OXIDES