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Nano Sized Pd Particles In A SiO2 Matrix By Sol-Gel Processing

Published online by Cambridge University Press:  21 February 2011

T. Burkhart
Affiliation:
Institut für Neue Materialien, Im Stadtwald Geb. 43, 66123 Saarbrücken, Germany
M. Mennig
Affiliation:
Institut für Neue Materialien, Im Stadtwald Geb. 43, 66123 Saarbrücken, Germany
H. Schmidt
Affiliation:
Institut für Neue Materialien, Im Stadtwald Geb. 43, 66123 Saarbrücken, Germany
A. Licciulli
Affiliation:
C.N.R.S.M. S.C.p.A., s.s. 7 Km 712, 72100 Brindisi, Italy
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Abstract

Pd colloid containing Ormocers (organically modified ceramics) have been prepared from Pd amino complexes of the type Pd[NH2CH2CH2NH(CH2)3Si(OMe)3]2ac2 by hydrolysis and condensation (sol-gel reaction) of the silane together with Si(OEt)4 and Si(OEt)3(CH2)3OCH2CHCH2O. The amino complex formation is necessary to avoid spontaneous reduction and uncontrolled colloid formations in the liquid phase. This synthesis route leads to Pd colloid containing powders and coatings on glass. By thermal curing (temperatures up to 500 °C) using different atmospheric conditions (N2, Ar, H2/N2) brown to deep black coatings on glass with transmission values from 80 to 0 % can be obtained. The average particle size can be controlled by varying the molar ratio of the used Pd salt (Pd(ac)2) and the aminosilane.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

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