Results 11 to 20 of about 79,065 (292)

Experimental and statistical study for leaching of niobium pentoxide from Pakistani ore [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2018
The growing demand for niobium pentoxide, based on its use in separation processes, established its prominent significance as a leading candidate in the field of separation science and technology.
Irfan Muhammad   +4 more
doaj   +1 more source

Occurrence of niobium in biotite-type Fe-REE-Nb ore in the Bayan Obo deposit

open access: yesSolid Earth Sciences, 2023
The Bayan Obo REE-Nb-Fe deposit, which reserves the current largest REE resources globally, also hosts 63.4% of China's Nb resources. Previous studies mainly focus on the isotopes and petrographic mineralogy of carbonatite dyke, ore-host dolomite and ...
Yisu Ren, Xiaoyong Yang, Xiaoxia Wang
doaj   +1 more source

Effect of magnesium reduction on the oxygen content of pickling niobium powder

open access: yesScientific Reports, 2021
Considering the problem of high oxygen content in industrial niobium powder, the oxygen reduction of high oxygen niobium powder with the addition of magnesium is studied.
Jingfeng Wang   +3 more
doaj   +1 more source

Influence of interstitials content on the diffusion of Niobium in alloy 718 [PDF]

open access: yes, 2009
Many studies have emphasized the beneficial effect of niobium on the physical metallurgy of Ni-Cr-Fe alloy 718. Among the different strengthening actions of niobium, such as solid solution hardening and carbide precipitation, the precipitation of niobium
Andrieu, Eric   +4 more
core   +1 more source

Alloy Formation by Electrodeposition of Niobium and Aluminium on Gold from Chloroaluminate Melts

open access: yesInternational Journal of Electrochemical Science, 2017
Niobium and aluminium have been electrodeposited from inorganic chloroaluminate melts onto gold substrate at 473 K. The melts were prepared from an equimolar mixture of AlCl3+NaCl with niobium added by anodic dissolution.
Nataša M. Vukićević   +4 more
doaj   +1 more source

Manipulating the carrier concentration and phase transition via Nb content in SrTiO3

open access: yesScientific Reports, 2022
SrTiO3 is a model of the perovskite-like compounds for structural transition which inducing the intriguing physical properties around the critical phase transition temperature TAFD (antiferrodistortive, abbrev. as AFD). Here we report that the electrical
Zhe Zhang   +6 more
doaj   +1 more source

Diamond Magnetometry of Meissner Currents in a Superconducting Film [PDF]

open access: yes, 2016
We study magnetic field penetration into a thin film made of a superconducting niobium. Imaging of magnetic field is performed by optically detecting magnetic resonances of negatively charged nitrogen-vacancy defects inside a single crystal diamond ...
Alfasi, Nir   +4 more
core   +1 more source

Main applications and characterization of world resources of niobium and progress in extraction [PDF]

open access: yesE3S Web of Conferences
This paper focuses on niobium applications in the steel industry, aerospace industry, electronics industry, superconducting alloys, medical and other fields.
Liu Ao, Su Wenrou, Wu Jie
doaj   +1 more source

The oxidative coupling of methane and the oxidative dehydrogenation of ethane over a niobium promoted lithium doped magnesium oxide catalyst [PDF]

open access: yes, 1993
The promoting effect of niobium in a Li/MgO catalyst for the oxidative coupling of methane (OCM) and for the oxidative dehydrogenation of ethane (ODHE) has been studied in some detail.
Li, X.   +4 more
core   +2 more sources

Mechanical and microstructural characterization of Nodular Cast Iron (NCI) with Niobium Additions [PDF]

open access: yesMaterials Research, 2014
Nodular cast irons (NCIs) involve the inoculation and nodulization of 0.03 to 0.06wt% Magnesium, as well as the addition of Molybdenum, Chromium, Nickel, Copper and Vanadium, although the presence of Niobium is not common.
Tânia Nogueira Fonseca Souza   +4 more
doaj   +1 more source

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