THE DETERMINATION OF NIOBIUM IN URANIUM NIOBIUM ALLOYS [PDF]
, 1958 The niobium-uranium alloy is dissolved in hydrofluoric nitric acids and the fluoride removed by fuming sulfuric acid. The niobium is hydrolyzed in an acid-sulfur dioxide medium and converted to niobic oxide by ignition at 900 deg C. The method covers the determination of niobium in niobium-uranium alloys having a niobium content of 8 to 12%.
Goward, G. W. +2 more
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The application of niobium and tantalum oxides for implant surface passivation. [PDF]
, 2007 Despite the advantages of ceramics, with their high corrosion stability in vivo, most medical implant constructions are still made from metals [1]. To increase the corrosion stability of metals, different coatings are applied to the implant surfaces,
Starikov, V. V. +4 more
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RF and Surface Properties of Bulk Niobium and Niobium Film Samples [PDF]
, 2012 The surface resistance Rs of superconducting cavities can be obtained from the unloaded quality factor Q0. Since RS varies strongly over the cavity surface its value must be interpreted as averaged over the whole cavity surface.
Weingarten, W. +6 more
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Occurrence of niobium in biotite-type Fe-REE-Nb ore in the Bayan Obo deposit
Solid 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
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Alloy Formation by Electrodeposition of Niobium and Aluminium on Gold from Chloroaluminate Melts
International 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
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Manipulating the carrier concentration and phase transition via Nb content in SrTiO3
Scientific 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
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Main applications and characterization of world resources of niobium and progress in extraction [PDF]
E3S Web of ConferencesThis 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
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Ethylenediaminium Niobium Oxyfluoride. [PDF]
ChemInform, 2005 AbstractFor Abstract see ChemInform Abstract in Full Text.
Nicholas F, Stephens, Philip, Lightfoot
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ANSA bridged metallocene chemistry of niobium [PDF]
, 1998 This thesis is concerned with the synthesis and characterisation of new ansa bridged bis-η-cyclopentadienyl derivatives of niobium. Chapter 1 provides an introduction to the area of early transition metal bent metallocene derivatives and charts the ...
Bailey, Nigel J.
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Mechanical and microstructural characterization of Nodular Cast Iron (NCI) with Niobium Additions [PDF]
Materials 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
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