Buscar
Mostrando ítems 11-20 de 145
Spectroscopic properties of Er3+ in oxysulfide glasses
(Elsevier B.V., 2002-10-07)
Er3+ -containing gallium-lanthanum oxysulfide glasses have been prepared from Ga2O3 and La2S3 in a sulfur/argon reactive atmosphere. The samples have been characterized by absorption and emission spectroscopy and IR emission ...
Crystallization of monoclinic WO3 in tungstate fluorophosphate glasses
(Elsevier B.V., 2009-03-15)
Tungstate fluorophosphate glass compositions with high WO3 concentration were prepared in the ternary system (80-0.8x)NaPO3-(20-0.2x)BaF2-xWO(3) with x = 40,50 and 60 mol%. Transparency decreases as WO3 concentration ...
Spectroscopy of InF3 based glasses containing a large amount of GdF3
(1997-05-12)
Glass formation in the pseudo ternary system ZnF2-GdF3-BaF2-InF3 and other complex systems stabilized by NaF, CaF2, AlF3 and YF3 have been investigated. Samples with greater stability have been prepared and their properties ...
Preparation of new glass systems by the polymeric precursor method for dental applications
(Elsevier B.V., 2004-10-01)
Glass ionomer cements (GICs) are largely employed in Dentistry for several applications, such as luting cements for the attachment of crowns, bridges, and orthodontic brackets as well as restorative materials. The development ...
Nonlinear Optical Properties of Tungsten Lead-Pyrophosphate Glasses Containing Metallic Copper Nanoparticles
(2013-07-08)
We have prepared heavy metal oxide glasses containing metallic copper nanoparticles with promising nonlinear optical properties which were determined by Z-scan and pump-probe measurements using femtosecond laser pulses. ...
Enhanced luminescence of Tb3+/Eu3+ doped tellurium oxide glass containing silver nanostructures
(American Institute of Physics (AIP), 2009-05-15)
We report on energy transfer studies in terbium (Tb3+)-europium (Eu3+) doped TeO2-ZnO-Na2O-PbO glass containing silver nanostructures. The samples excitation was made using ultraviolet radiation at 355 nm. Luminescence ...
Enhanced optical properties of germanate and tellurite glasses containing metal or semiconductor nanoparticles
(2013-05-13)
Germanium- and tellurium-based glasses have been largely studied due to their recognized potential for photonics. In this paper, we review our recent studies that include the investigation of the Stokes and anti-Stokes ...
Raman and infrared investigations of glass and glass-ceramics with composition 2Na2O·1CaO·3SiO2
(Materials Research Society, 2014)
Glasses in the SbPO4-WO3 system
(Elsevier B.V., 2007-06-01)
Glasses in the binary system (100 - x)SbPO4-xWO3 (20 <= x <= 60, x in mol%) have been prepared and characterized. Differential thermal analysis (DTA) shows that the glass transition temperature, T-g increases from 412 ...
Qualidade fisiológica de sementes de Sebastiania commersoniana (Baill.) Smith & Downs (branquilho - Euphorbiaceae) durante o armazenamento
(2007-06-01)
This paper aims to evaluate the physiological quality of Sebastiania commersoniana seeds stored in cloth bag, plastic bag and glass container and kept in two conditions: laboratory workbench and cold chamber (4 ± 2°C e 80% ...