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Formation and properties of chelated aluminumalkoxides

: Naß, R.; Schmidt, H.

Deutsche Keramische Gesellschaft e.V. -DKG-:
Ceramic Powder Processing Science
Bad Honnef, 1989
International Conference of Ceramic Powder Processing Science <2, 1988, Berchtesgaden>
Conference Paper
Fraunhofer ISC ()
aluminiumalkoxide; Hydrolyse; polycondensation; sol-gel

Chelated aluminumalkoxides have been prepared from the reaction of aluminum-secbutoxide with acetylacetone (AcAc) or ethylacetoacetate (EAA) in different alkoxide/chelating agent molar ratios. These compounds have been used to study the possibility of controlling the rate of hydrolysis of aluminumalkoxides and/or the polycondensation of the related hydroxides. Hydrolysis was followed by NIR-spectroscopy and showed no differences for chelated aluminum-secbutoxide and the pure alkoxide. In contrast the polycondensation of aluminumhydroxides chelated with ethylacetoacetate decreased remarkably and depends on the alkoxide/chelating agent molar ratio.