Results 171 to 180 of about 92,344 (249)

Interface Stoichiometry and Structure in Anodic Niobium Pentoxide

Microscopy and Microanalysis, 2008
AbstractHigh-resolution transmission electron microscopy and electron energy loss spectroscopy (EELS) were performed on electrochemically anodized niobium and niobium oxide. Sintered anodes of Nb and NbO powders were anodized in 0.1 wt% H3PO4at 10, 20, and 65 V to form surface Nb2O5layers with an average anodization constant of 3.6 ± 0.2 nm/V.
Matthew J, Olszta, Elizabeth C, Dickey
openaire   +2 more sources

Magnetic Fluctuations in Niobium Pentoxide

Magnetic Fluctuations in Niobium Pentoxide
Y. Krasnikova
openaire   +2 more sources

The pentoxides of niobium and tantalum as dehydration catalysts

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1961
1. The activation energy of the dehydration of isoptopyl alcohol on two samples of niobium pentoxide with different activities (ɛ=23.4 and 27.0 kcal/M) and on tantalum pentoxide (ɛ=23.8 kcal/M) was determined. The action (reaction velocity) constants and the constants of the logarithmic dependence were determined. 2.
A. A. Balandin, N. P. Sokolova, Yu. P. Simanov   +2 more
openaire   +1 more source

Influence of Graphene, Hydroxyapatite, and Hydroxyapatite‐Niobium Pentoxide Nanoparticles on Polycaprolactone Electrospun Fibers Mats Properties

Journal of Applied Polymer Science
Polycaprolactone (PCL) electrospun fiber mats containing varying concentrations of graphene flakes (GF), hydroxyapatite (HAp), and hydroxyapatite with niobium pentoxide (HAp5Nb) were successfully prepared by electrospinning.
E. G. de Moraes, Karina Luzia Andrade, L. B. Ribeiro, Letícia Alves da Costa Laqua, Daiara Floriano da Silva, S. Arcaro, Larissa Shinju Hiratsuka, D. Tada, F. L. Faita, A. P. N. de Oliveira, R. Machado   +10 more
semanticscholar   +1 more source

Studies on Niobium Oxides and Polymorphism of Niobium Pentoxide

Transactions of the Indian Ceramic Society, 1969
The oxidation of pure niobium powder in air has been investigated. It is observed that after the initial dissolution of a small percentage of oxygen in the niobium lattice, oxidation commences with the formation of lower-oxides of niobium. The existence of a sub-oxide ascribed as NbOx is detected below 350°C having a structure closely resembling that ...
openaire   +1 more source

Oxygen diffusion in alpha-niobium pentoxide

Journal of the Less Common Metals, 1968
Abstract The diffusion of O 18 into single crystals of α-Nb 2 O 5 , in stoichiometric and non-stoichiometric condition, has been determined by the O 18 (p,n) F 18 reaction, followed by autoradiography to determine the location of the F 18 . The results show that the diffusion coefficients for oxygen are up to 200 times greater parallel to [010 ...
J.S. Sheasby, B. Cox
openaire   +1 more source

An amorphous niobium pentoxide-carbon composite as a structurally stable high performance anode material for sodium-ion batteries.

Chemical Communications
Sodium-ion batteries have shown the advantages of abundant reserves and low environmental impact. Niobium pentoxide has drawn significant interest as an anode material for sodium-ion storage due to its high reversible capacity.
Yuanshang Zhang, Jing Yu, Shikai Gu, Lijun Gao   +3 more
semanticscholar   +1 more source

Evidence of oxygen vacancy-mediated ultrahigh SERS sensitivity of Niobium pentoxide nanoparticles through defect engineering: theoretical and experimental studies.

Nanoscale, 2023
Oxygen vacancy engineering in metal oxide-based semiconductors has emerged as an important area of research for sensing applications, such as Surface-enhanced Raman scattering (SERS), gas sensing, etc.
Sirsendu Ghosal, Abhilasha Bora, P. K. Giri   +2 more
semanticscholar   +1 more source

Synthesis and characterization of polypyrrole/graphitic carbon nitride/niobium pentoxide nanocomposite for high‐performance energy storage applications

Journal of Applied Polymer Science
Graphitic carbon nitride (GCN) has been employed as a supercapacitor electrode because of its high carbon‐to‐nitrogen ratio and flexible structure. However, its low surface area and poor conductivity continue to be obstacles for practical usage.
J. Xavier
semanticscholar   +1 more source

Thermodynamic Study of Nonstoichiometric Niobium Pentoxide

Journal of the American Ceramic Society, 1965
The partial pressure of oxygen in equilibrium with a niobium dioxide‐niobium pentoxide mixture was determined from electrochemical cell measurements over the range 800° to 1070°C and from thermogravimetric gas‐equilibrium measurements at 1000° and 1200°C. These measurements compare favorably with those of previous investigators. An
R. N. BLUMENTHAL, J. B. MOSER, D. H. WHITMORE   +2 more
openaire   +1 more source