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Structural evolution up to 1100 degrees C of xerogels prepared from TEOS sonohydrolysis and liquid phase exchanged by acetone
(Elsevier B.V., 2006-02-01)
Silica xerogels were prepared from sonohydrolysis of tetraethoxysilane and exchange of the liquid phase of the wet gel by acetone. Monolithic xerogels were obtained by slow evaporation of acetone. The structural characteristics ...
Effects of poly(vinyl alcohol) additions on the structure of silica xerogels
(Elsevier B.V., 2009-09-01)
Poly(vinyl alcohol)/silica hybrid xerogels were prepared from sonohydrolysis of tetraethoxysilane (TEOS) and additions of water-solution of poly(vinyl alcohol) (PVA). The samples were Studied by small-angle X-ray scattering ...
EXAFS and XRD Study of the Structural Evolution during Isothermal Sintering of SnO2 Xerogels
(1997-12-01)
The formation of an ordered (crystalline) phase during isothermal sintering of SnO2 monolithic xerogels, at 200, 250, 300, 400, 500, 600 and 700°C, has been analyzed by the combined use of EXAFS and XRD techniques. For the ...
Effects of poly(vinyl alcohol) additions on the structure of silica xerogels
(Elsevier B.V., 2009-09-01)
Poly(vinyl alcohol)/silica hybrid xerogels were prepared from sonohydrolysis of tetraethoxysilane (TEOS) and additions of water-solution of poly(vinyl alcohol) (PVA). The samples were Studied by small-angle X-ray scattering ...
EXAFS and XRD Study of the Structural Evolution during Isothermal Sintering of SnO2 Xerogels
(1997-12-01)
The formation of an ordered (crystalline) phase during isothermal sintering of SnO2 monolithic xerogels, at 200, 250, 300, 400, 500, 600 and 700°C, has been analyzed by the combined use of EXAFS and XRD techniques. For the ...
The effects of temperature of condensation on the thermal stability and morphology of 1,4-phenylenediamine-1-propylsilica xerogels
(SpringerDordrechtHolanda, 2005)