Zobrazeno 1 - 10
of 26
pro vyhledávání: '"J. F. Quinson"'
Autor:
Martine Verdenelli, Christelle Veytizou, Karine Velez, Catherine Sigala, Stephane Parola, J.P. Scharff, J. F. Quinson
Publikováno v:
Journal of Sol-Gel Science and Technology. 26:803-806
Sol-gel coatings on non-oxide substrates can be used to prevent high temperature degradation and to improve wet corrosion resistance. Alumina coatings were investigated. The starting precursor was aluminium sec-butoxide, modified with chelating ligan
Publikováno v:
Journal of Materials Chemistry. 10:365-370
The synthesis of zircon powders from an aqueous precusor sol has been studied. The starting solution, prepared by hydrolyzing TEOS in an aqueous solution of zirconyl nitrate, was refluxed then precipitated into an ammonia solution. The evolution of t
Autor:
J. F. Quinson, K. Velez
Publikováno v:
Journal of Sol-Gel Science and Technology. 19:469-472
Al2O3 coatings were obtained by the alkoxide route and deposited on stainless steel using the dip coating technique. The starting precursor was aluminum sec-butoxide modified by acrylic acid in order to prevent its precipitation in the presence of wa
Publikováno v:
Journal of Sol-Gel Science and Technology. 16:201-208
A new way of modifying aluminum sec-butoxide (Al(OBus)3) is proposed. This synthesis is carried out by reacting Al(OBus)3 dissolved in tetrahydrofuran with an unsaturated acid, viz. acrylic acid.
Publikováno v:
Journal of Sol-Gel Science and Technology. 13:779-782
The development of heteropolysiloxane coatings on electrogalvanized steel by sol-gel processing has been studied from the sol state to the solid state using techniques such as 29Si NMR, SIMS, XPS, and the three point flexure test. It was possible, fr
Publikováno v:
Journal of Sol-Gel Science and Technology. 8:189-194
Publikováno v:
Journal of Materials Science. 31:5179-5184
ZrO2 coatings were obtained by the alkoxide route and deposited on to stainless steel using the dip-coating technique. The starting solutions were prepared by mixing zirconium tetrabutoxide, isopropanol, acetylacetone. The water content for the hydro
Publikováno v:
Journal of Sol-Gel Science and Technology. 7:45-51
Parasites have been encapsulated within sol-gel silica matrices. Thermoporometry measurements show that the pore size depends strongly on experimental conditions. Pores as large as 100 A in diameter can be obtained, allowing the diffusion of large bi
Publikováno v:
Journal of Sol-Gel Science and Technology. 2:363-366
The porous texture of silica-alumina hydrogel can be taylored by controlling the operating parameters of the preparation process. As the drying drastically modifies the texture it is important to minimize pore volume and radius decreases. Owing to a
Publikováno v:
Journal of Non-Crystalline Solids. 145:25-32
During hypercritical drying (HD), physicochemical transformations are induced which can be associated with an acceleration of the aging effect. The macroscopic signature of this evolution is an isotropic shrinkage characteristic of syneresis. During