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Mostrando ítems 11-20 de 20155
Through glass, the rise of modern science
(Brasil, 2015)
Picture, if you can, a world without glass. There would be no microscopes or telescopes, i.e., no sciences of microbiology or astronomy. Artists would draw without the benefits of a three-dimensional perspective, and ships ...
Crystallization of fluorindate and fluorogallate glasses
(1997-10-01)
Crystallization of binary InF3-MF2 and GaF3-MF2 (where M = Ba, Sr and Ca) glasses was studied. Characteristic temperatures and kinetic parameters E (activation energy) and n (Avrami exponent) were obtained. Stability against ...
Crystallization of fluorindate and fluorogallate glasses
(1997-10-01)
Crystallization of binary InF3-MF2 and GaF3-MF2 (where M = Ba, Sr and Ca) glasses was studied. Characteristic temperatures and kinetic parameters E (activation energy) and n (Avrami exponent) were obtained. Stability against ...
Crystallization kinetics of glass prepared with foundry slag
(2021-07-01)
Iron foundry slag and hydrated lime were used in glass preparation by the melt-quenching method. The glass obtained was heat-treated using the thermal analysis technique. A crystallization kinetics study was carried out ...
Er3+-doped niobium alkali germanate glasses and glass-ceramics: NIR and visible luminescence properties
(Elsevier B.V., 2019-10-01)
Niobium alkali germanate glasses doped with Er3+ up to 4.0 mol% were synthesized by the melt-quenching technique. Glass-ceramics were obtained by controlled heat treatment of the pristine glass. Thermal and optical properties ...
Effects of glass-forming histories on the crystallization kinetic of the 20Li(2)O-80TeO(2) glass
(Elsevier B.V., 2011-10-01)
In the present work, tellurite 20Li(2)O-80TeO(2) glasses were prepared with identical nominal composition under different glass-forming histories to produce a stressed and stress-free samples. X-ray Diffraction (XRD) and ...
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure
(2006-12-01)
In Lead-cadmium fluorogermanate glasses (PbF2-CdF 2-PbGeO3) the addition of metal fluorides to the base PbGeO3 glass leads to a decrease of the glass transition temperature (Tg) and to an enhancement of the ionic conductivity ...
Effects of glass-forming histories on the crystallization kinetic of the 20Li(2)O-80TeO(2) glass
(Elsevier B.V., 2011-10-01)
In the present work, tellurite 20Li(2)O-80TeO(2) glasses were prepared with identical nominal composition under different glass-forming histories to produce a stressed and stress-free samples. X-ray Diffraction (XRD) and ...