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Monolithic diphasic gels of mullite by sol-gel process under ultrasound stimulation
(1998-12-01)
Diphasic gel in the mullite composition was prepared from a colloidal sol of boehmite mixed with a hydrolyzed tetraethoxisilane (TEOS) solution. The boehmite sol was obtained by peptization of a poorly crystallized or very ...
Pore size distribution of unsupported SnO2 membranes prepared by sol-gel process - Code: EP21
(1994-01-01)
Unsupported SnO2 membranes were prepared by sol-gel process and characterized by N2 adsorption-desorption isotherms and X-ray diffraction. Results show that the texture of dried samples does not change appreciably with the ...
Structural features of phosphate and sulfate modified zirconia prepared by sol-gel route
(Springer, 2004-10-01)
This paper describes the effect of sulfate, phosphate and nitrate complexing ligands on the structural features of amorphous xerogels and on the crystallization of metastable zirconia phases during the xerogel-ceramic ...
Characterization of nanosized ZnAl2O4 spinel synthesized by the sol-gel method
(Springer, 2009-01-01)
Single-phase zinc aluminate (ZnAl2O4) nanoparticles with the spinel structure was successfully obtained by the sol-gel method. The nanoparticles are crystalline with no impurities related to ZnO or Al2O3 residues. The ...
Effect of aging on the stability of ceramic foams prepared by thermostimulated sol-gel process
(Kluwer Academic Publ, 2003-01-01)
This work presents a new route of preparation of zirconium ceramic foams based on the thermostimulated sol-gel process. This method produces gelled bodies with up to 90% of porosity in the wet gel and can be used to make ...
Ultraviolet excitation of photoconductivity in thin films of sol-gel SnO2
(Elsevier B.V., 2005-01-01)
Tin dioxide (SnO2) thin film photoconductivity spectra were measured for a large temperature range using a deuterium source, the intensity of photocurrent spectra in the range 200-400 nm is temperature dependent, and the ...
The influence of Na+ on the anilinepropylsilica xerogel synthesis by using the fluoride nucleophilic catalyst
(Springer-verlagNew YorkEUA, 2003)
Thermochemical investigation on the adsorption of some divalent cations on modified silicas obtained from sol-gel process
(Elsevier Science BvAmsterdamHolanda, 2000)