Buscar
Mostrando ítems 71-80 de 126
Capacitance and resistance measurements of SnO2 thick-films
(Springer, 2008-02-05)
Impedance spectroscopy measurements on SnO2 thick films were carried out in an air atmosphere and for temperatures between 25 0C and 425 0C. Capacitance and resistance analyses reveal the mechanisms responsible for ...
Influence of La2O3, Pr2O3 and CeO2 on the nonlinear properties of SnO2 multicomponent varistors
(Elsevier B.V., 2002-03-01)
The influence of La2O3, Pr2O3 and CeO2 on a new class of polycrystalline ceramics with nonlinear properties based on SnO2, was investigated. La2O3 and Pr2O3 were found to precipitate at the grain boundary region, causing ...
Influence of La2O3, Pr2O3 and CeO2 on the nonlinear properties of SnO2 multicomponent varistors
(Elsevier B.V., 2002-03-01)
The influence of La2O3, Pr2O3 and CeO2 on a new class of polycrystalline ceramics with nonlinear properties based on SnO2, was investigated. La2O3 and Pr2O3 were found to precipitate at the grain boundary region, causing ...
Hydrogen effects on the mechanical properties of nanocrystalline free-standing Palladium thin films
(Elsevier Ltd., 2020-05)
Pd membranes are used both in hydrogen detection and hydrogen separation devices. Their properties can be improved at the nanometer scale. We simulate atomistically the tensile properties of Pd mono and polycrystalline ...
Microstructural analysis and oxidation protection behavior of Cr-Ni surface coatings of 347 stainless steel by rapid mirror scanning of a high power CO2 laser
(AMER INST PHYSICS, 2009)
A surface coating technique that uses a I kW CO, laser beam actuated by two high-speed raster-scanning mirrors was utilized to selectively consolidate predeposited powder coatings consisting of 50%Cr-50% Ni (wt %) over the ...
Understanding why dislocation loops are visible in transmission electron microscopy: The tungsten case
(Elsevier, 2021-11)
Dislocation loops finely disperse in bulk W are generally visible to the transition electron microscopy (TEM) after irradiation. In the absence of strong interactions, these loops would normally diffuse very fast until ...
Obtenção e caracterização estrutural, microestrutural e elétrica do condutor protônico BaCe1-xYxO3-δ com e sem aditivo de sinterização
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMCâmpus São Carlos, 2016-12-19)
The study of solid electrolytes (SE) is important to the scientific and technological development of materials used in application related to clean energy generation, such as Solid Oxide Fuel Cells (SOFCs). Yttrium-doped ...
Separation of dielectric and space charge polarizations in CaCu3Ti4O12/CaTiO3 composite polycrystalline systems
(American Institute of Physics (AIP), 2014)