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Mostrando ítems 9961-9970 de 13795
Recuperación de álabes de turbina por soldadura GTAW-TIG
(Universidad Nacional de Ingeniería, 2017)
Recuperación de álabes de turbina por soldadura GTAW-TIG
(Universidad Nacional de Ingeniería, 2017)
Avaliação da estabilidade dimensional de ferramentas de hidroconformação fabricadas por manufatura aditiva
(Universidade Estadual Paulista (Unesp), 2022-03-07)
O presente trabalho avalia a estabilidade dimensional de ferramentas de hidroconformação fabricadas por Manufatura Aditiva (MA). Há evidências que a tecnologia de hidroconformação surgiu no final da década de 50, é ...
Anomalous temperature behavior of resistance in C1-xCox thin films grown by pulsed laser deposition technique
(2016-05-15)
We study the transport properties of C1-xCox thin films (with x = 0.1, 0.15 and 0.2) grown on Si substrate by pulsed laser deposition technique. The results demonstrate some anomalous effects in the behavior of the measured ...
Photoluminescent properties of ZrO2: Tm3+, Tb3+, Eu3+powders—A combined experimental and theoretical study
(2017-01-01)
Rare-earth (RE) element-based materials for optical applications have received increasing attention owing to the emission properties of RE ions, which render these materials suitable for use in color displays, lasers, and ...
Combined theoretical and nanoscale experimental study of Pb(Ca,Ba)TiO3, Pb(Sr,Ba)TiO3, and Pb(Sr,Ca)TiO3complex perovskite structures: An investigation of the ferroelectric and electronic properties
(2017-01-01)
Combined experimental and first-principles studies have been conducted to obtain a fundamental understanding of the effect of A-site chemical doping on the electronic structure and ferroelectric behavior of Pb(Ca,Ba)TiO3, ...
Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method
(2018-06-25)
ZnMoO4 and ZnMoO4: RE3+ = 1% Tb3+, 1% Tm3+, x Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles were prepared by a sonochemical method. The influence of the dopant content on photoluminescent behavior was investigated. The ...
On the efficient Te4+→Yb3+ cooperative energy transfer mechanism in tellurite glasses: A potential material for luminescent solar concentrators
(2019-04-15)
Te4+/Yb3+ co-doped 80%TeO2–20%Li2O glasses (amounts in mol%) were prepared by the conventional melt-quenching method in an ambient atmosphere, in order to investigate their optical characteristics for application in solar ...
High tantalum oxide content in Eu3+-doped phosphate glass and glass-ceramics for photonic applications
(2020-11-25)
Transparent Eu3+-doped tantalum phosphate glass-ceramics containing Na2Ta8O21 nanocrystals were successfully obtained by a two-step heat treatment. Structural analyses were performed using X-ray diffraction, Transmission ...
Multicolor-emitting luminescent Y2O3:RE3+@SiO2-[RE3+(β-diketone)3] core@shell hybrids featuring dual RE3+ activator centers
(2020-11-30)
Luminescent inorganic-organic hybrids find several applications such as in multifunctional devices or in bioimaging. In this regard, through a step-by-step process, inorganic-organic core@shell-like hybrids based on ...