Results 41 to 50 of about 92,344 (249)
OBTENÇÃO DE FASE ÚNICA DE PENTÓXIDO DE NIÓBIO POR UMA ROTA SIMPLES E SUA CARACTERIZAÇÃO [PDF]
Química NovaBrazil has the world’s largest reserve of niobium (~98%) which turns niobium compounds into extremely interesting materials from a strategic point of view in the country. Niobium pentoxide is an n-type semiconductor that presents interesting physical and
Michelle D. A. Lage +5 more
doaj +1 more source
, 2016 Optical, structural and electrochromic properties of tantalum pentoxide-doped niobium pentoxide films prepared by sol-gel spin-coating method were studied.
Pehlivan, Esat +3 more
core +1 more source
Investigative properties of CeO2 doped with niobium: A combined characterization and DFT studies
Nanotechnology Reviews, 2021 Catalytic capacity of ceria mainly stems from a facile switch in the Ce oxidation states from +4 to +4 − x. While various experimental and computational studies pinpoint the reduction chemistry of Ce atom through the creation of oxygen vacancies, the ...
Shittu Toyin, Altarawneh Mohammednoor
doaj +1 more source
Temperature-pressure phase relationships in niobium pentoxide
Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1973 A pressure-temperature (P-T) section of the phase equilibrium diagram for Nb2O5 has been determined. Four single phase regions, H-Nb2O5, B-Nb2O5, and two L-Nb2O5 areas, were characterized by x-ray powder diffraction data. The superstructure of L-Nb2O5 was indexed on the basis of similarities to the known superstructures of L-Ta2O5 and confirmed with ...
J L, Waring, R S, Roth, H S, Parker
openaire +2 more sources
Mechanochemical Synthesis of Lithium-Niobate-Doped Copper Oxide
KONA Powder and Particle Journal, 2013 It is demonstrated by means of XRD, IR spectroscopy, electron microscopy, laser light scattering and measurements of the specific surface area that mechanical activation of a mixture of lithium carbonate, niobium pentoxide and copper oxide in the ...
Aleksey Alekseevich Gusev +2 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Sustainability assessment requires methodologies that appropriately distinguish between additive and non‐additive material properties. A toxicity‐weighted scoring system is developed and applied that accounts for the disproportionate influence of highly toxic constituents through nonlinear weighting functions, providing more realistic estimates than ...
Seth Mehalic +2 more
wiley +1 more source
Neuromorphic Devices and Computing for Sensing, Memory, and Control
Advanced Science, EarlyView.This review introduces neuromorphic devices made from diverse materials. These devices mimic neuronal functions and architectures and, when integrated with artificial or biological computing, can form closed loops with neurons for pressure, optical, acoustic, and biochemical sensing and modulation.
Zhengguang Zhu +2 more
wiley +1 more source
NanoNEXTThe characterization of Isanlu-Isin columbite was conducted to obtain data suitable for its beneficiation to metallurgical grade. Samples from various locations within the mining site underwent homogenization, crushing, and grinding for characterization.
Omowunmi B. Akinnodi +3 more
semanticscholar +1 more source
Development of a microwave absorbing material based on molybdenum-doped niobium pentoxide [PDF]
, 2019 This work aimed to perform the characterization of electrical properties of niobium pentoxide, Nb2O5, pure and doped with molybdenum, prepared by powder metallurgy route and to do a comparative analysis of the influence of this material when sintered in ...
Queiroz Júnior, Idalmir de Souza +5 more
core +1 more source
Chemistry – A European Journal, EarlyView.Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley +1 more source