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Synthesis and characterization of cordierite from acetylacetonate/alkoxide precursors

Published online by Cambridge University Press:  31 January 2011

Lawrence D. David ,
Ronald M. Anderson ,
Joseph M. Dynys ,
Charles C. Goldsmith  and
Andrew Szule
Lawrence D. David
Affiliation:
IBM General Technology Division, Hopewell Junction, New York 12533
Ronald M. Anderson
Affiliation:
IBM General Technology Division, Hopewell Junction, New York 12533
Joseph M. Dynys
Affiliation:
IBM General Technology Division, Hopewell Junction, New York 12533
Charles C. Goldsmith
Affiliation:
IBM General Technology Division, Hopewell Junction, New York 12533
Andrew Szule
Affiliation:
IBM General Technology Division, Hopewell Junction, New York 12533
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Abstract

Syntheses of ultrafine glass powders in the MgO–Al2O3–SiO2 ternary oxide system were effected by drying and calcining sols derived from acetylacetonate-tetraethoxysilane ethanol solutions. A mixture of magnesium and aluminum acetylacetonates, dissolved with Si(OC2H5)4 in an ethanol solution in a 2:4:5 Mg: Al: Si mole ratio, was hydrolyzed, spray-dried, and calcined to yield a glass powder of 70 Å primary particle size, which sintered to densities ≥ 2.5 g/cm3 and which formed μ-cordierite as the only crystalline phase below 1000 °C. Incorporation of dopant quantities of boron and phosphorus, via their alkyl esters in the hydrolysis reaction with Si(OC2H5)4 and the acetylacetonates, afforded powders which crystallized in the α-phase directly after sintering to density = 2.66 g/cm3.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 7 , July 1993 , pp. 1697 - 1702
Copyright
Copyright © Materials Research Society 1993

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References

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