1. Sol-gel process chemistry
The sol-gel process is a so-called "soft chemistry" method for obtaining ceramics by simple polymerization of molecular precursors in solution
[14][15]
. These precursors can be inorganic salts (Al(NO
3
)
3
, for example), but are most often transition metal or silicon alkoxides of the general formula M(OR)
4
with M = Si, Ti, Zr...
The formation of an oxide network from alkoxides involves the hydrolysis and condensation reactions described in figure
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Corrosion - Aging
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Sol-gel process chemistry
References
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(1) - LIVAGE (J.), HENRY (M.), SANCHEZ (C.) -
Progress in Solid State Chemistry. 18, p. 259 (1988).
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(2) - BRADLEY (D.C.) -
Metal alkoxides
-
. Academic Press, New York (1978).
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(3)...
Patents
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[Brev1] CHUNG YUNG JIN, JEANJAQUET (S.L.), KENDIG (M.W.) (Boeing Co). – Corrosion inhibiting sol-gel coatings for metal alloys. US2003024432, EU (06 févr. 2003).
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[Brev2] UENO SHNKICHI, DANIEL DON JAYASEELAN, OJI TATSUKI, KANZAKI SHUZO (Nat. Inst. of Adv. Ind. and Technol.)....
Some recent theses
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ROUX (S.) -
Préparation de matériaux hybrides à base de polymères conducteurs : application à la protection d'un acier doux.
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Université de Besançon (2000).
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DIDIER (B.) -
Synthèse d'un matériau hybride polyimide/silice par voie sol-gel : étude structure/propriétés....
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Silicon alkoxide/transition metal alkoxide reactivity
