Nano sized Pd particles in a SiO{sub 2} matrix by sol-gel processing

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:51647

Burkhart, T; Menning, M; Schmidt, H ^[1]; Licciulli, A ^[2]

---

1. Im Stadtwald, Saarbruecken (Germany). Inst. fuer Neue Materialien
2. C.N.R.S.M. S.C.p.A., Brindisi (Italy)

Pd colloid containing Ormocers ({und or}ganically {und mod}ified {und cer}amics) have been prepared from Pd amino complexes of the type Pd[NH{sub 2}CH{sub 2}CH{sub 2}NH(CH{sub 2}){sub 3}Si(OMe){sub 3}]{sub 2}ac{sub 2} by hydrolysis and condensation (sol-gel reaction) of the silane together with Si(OEt){sub 4} and Si(oEt){sub 3}(CH{sub 2}){sub 3}OCH{sub 2}CHCH{sub 2}O. 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 (N{sub 2}, Ar, H{sub 2}/N{sub 2}) 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){sub 2}) and the aminosilane.

• OSTI ID: 51647
• Report Number(s): CONF-940411--; ISBN 1-55899-246-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL REACTIONS
COATINGS
COLLOIDS
COMPOSITE MATERIALS
DIFFERENTIAL THERMAL ANALYSIS
EXPERIMENTAL DATA
FABRICATION
FLOWSHEETS
PALLADIUM
PARTICULATES
SILICON OXIDES
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY