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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 ...
Broadband NIR emission in novel sol-gel Er3+-doped SiO 2-Nb2O5 glass ceramic planar waveguides for photonic applications
(2013-01-01)
This paper reports on the sol-gel preparation and structural and optical characterization of new Er3+-doped SiO2-Nb 2O5 nanocomposite planar waveguides. Erbium-doped (100-x)SiO2-xNb2O5 waveguides were deposited on ...
Experimental and Monte Carlo simulation: the role of urea in mullite synthesis
(Elsevier Sci LtdOxfordInglaterra, 2001)
Relevance of sol–gel transition and spinodal decomposition for hierarchical porosity structure of monolithic alumina
(2021-01-01)
In situ techniques were used to investigate the hierarchical porous structure of alumina monoliths formed by the combined processes of sol–gel transition and spinodal phase separation. The addition of low molecular weight ...
Acid and base catalysts in the hybrid silica sol-gel process
(Academic Press IncSan DiegoEUA, 1997)
Efeito da sílica sol-gel na estrutura e resistência mecânica à compressão de pasta de cimento portland e de concreto de pós reativos
(Universidade Federal de Minas GeraisUFMG, 2016-11-21)
The pozzolanic effect of the sol-gel silica additive on the structure andcompressive strength of Portland cement paste of high initial resistance and reactive powder concrete, with low factor water/cement, was analyzed. ...
Gelation and drying of weakly bonded silica-PPO nanocomposites
(Blackwell Munksgaard, 2003-06-01)
Silica-poly(oxypropylene) (PPO) nanocomposites containing PPO with weak physical bonds between the organic (PPO) and inorganic (silica) phases were obtained by the sol-gel procedure. Three precursor sols containing silica ...
Gelation and drying of weakly bonded silica-PPO nanocomposites
(Blackwell Munksgaard, 2003-06-01)
Silica-poly(oxypropylene) (PPO) nanocomposites containing PPO with weak physical bonds between the organic (PPO) and inorganic (silica) phases were obtained by the sol-gel procedure. Three precursor sols containing silica ...
Hybrids of poly(ethylene oxide co-epichlorhydrin) and silica: phase separation, morphology and thermal properties
(Elsevier Sci LtdOxfordInglaterra, 1998)