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The kinetic of mullite crystallization: Effect of water content
(2010)
The kinetic of mullite crystallization from sol–gel method, with different water content, was investigated under non-isothermal conditions using DTA. The sols were obtained from Al(NO3)3.9H2O (ANN) and Si(OC2H5)4 (TEOS) ...
Study of Hybrid Silica-Polyethyleneglycol Xerogels by Eu3+ Luminescence Spectroscopy
(1999-12-01)
Good optical quality Eu3+-doped silica-polyethyleneglycol hybrids were prepared by the sol-gel process. Thermomechanical analysis showed an increase of the glass transition temperature, due to the stiffness of the polymeric ...
Liquid crystalline formulations containing modified surface TiO2 nanoparticles obtained by sol-gel process
(Springer, 2012-08-01)
Titanium dioxide (TiO2) is an inorganic compound used as sunscreen in cosmetic/pharmaceutical formulations as a way to prevent the skin cancer. In this work we have used surface modified titania nanoparticles obtained by ...
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
(1999-12-01)
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
(1999-12-01)
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
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 ...