Results 31 to 40 of about 79,389 (194)

Extraction of Niobium from ore deposits in KPK, Pakistan

NUST Journal of Engineering Sciences, 2015
The extraction of Niobium through different extraction processes is reviewed in this paper. On the commercial scale the solvent extractants have been employed for the extraction of Niobium in the presence of hydrogen fluoride.
Muhammad Irfan, Muhammad Imran Ahmad, Muhammad Saleem Khan   +2 more
doaj   +1 more source

Purification of Niobium by Electron Beam Melting

High Temperature Materials and Processes, 2016
Pure niobium metal, produced by alumino-thermic reduction of niobium oxide, contains various impurities which need to be reduced to acceptable levels to obtain aerospace grade purity. In the present work, an attempt has been made to refine niobium metals
Sankar M., Mirji K.V., Prasad V.V. Satya, Baligidad R.G., Gokhale A.A.   +4 more
doaj   +1 more source

Recovery of niobium and titanium from ilmenorutile by NaOH roasting-H2SO4 leaching process

Journal of Materials Research and Technology, 2021
Niobium has a wide range of application in various industries such as materials, alloy, and electronic industry. To improve the use of ilmenorutile in China's Bayan Obo deposit, a novel process of extracting niobium, titanium, and iron from ilmenorutile ...
Linquan Sun, Hongdong Yu, Fancheng Meng, Tao Qi, Lina Wang, Yihe Peng   +5 more
doaj   +1 more source

Inclusive omega photoproduction off nuclei [PDF]

, 2003
We investigate inclusive omega photoproduction off complex nuclei, concentrating on the feasibility to examine a possible in-medium change of the omega meson properties by observing the pi^0 gamma invariant mass spectrum. The simulations are performed by
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core   +1 more source

Experiment on New Comprehensive Recovery of Micro-fine Particle Low-grade Refractory Tantalum Niobium Lithium Resources

Kuangchan zonghe liyong
The fine-grained low-grade tail mud of the Yichun tantalum niobium ore contains 0.17% Li2O，0.007 1% Ta2O5，0.007 8% Nb2O5, and whiteness is 24.20%. Mineralogical studies indicate that tantalum-niobium minerals and lithium mica particles in the tailings ...
Qiangqiang WANG, Zhenfei LI, Yuefu GUO, Xinchun SHEN, Jiquan LAI, Ting ZHANG   +5 more
doaj   +1 more source

Characteristics of a production route for filamentary Nb3Sn superconductors based on a reaction between niobium and Nb6Sn5 [PDF]

, 1989
Monofilamentary Nb3Sn superconductors have been made by application of a reaction between Nb6Sn5 powder and niobium. The layer thickness of Nb3Sn shows a parabolic time dependence, implying diffusion-controlled layer growth.
Kolster, B.H., Neijmeijer, W.L.
core   +3 more sources

RRR Characteristics for SRF Cavities

, 2015
The first heavy ion accelerator is being constructed by the rare isotope science project (RISP) launched by the Institute of Basic Science (IBS) in South Korea.
Hyun, Myungook, Joung, Mijoung, Jung, Yoochul   +2 more
core   +1 more source

Electronic signature of the vacancy ordering in NbO (Nb3O3)

, 2017
We investigated the electronic structure of the vacancy-ordered 4d-transition metal monoxide NbO (Nb3O3) using angle-integrated soft- and hard-x-ray photoelectron spectroscopy as well as ultra-violet angle-resolved photoelectron spectroscopy.
Altendorf, S. G., Chen, C. T., Efimenko, A. K., Hoefer, K., Hollmann, N., Hsieh, H. H., Hu, Z., Kasinathan, D., Komarek, A. C., Liao, Y. F., Lin, H. -J., Nugroho, A. A., Rata, A. D., Takegami, D., Tjeng, L. H., Tsuei, K. -D., Weinen, J., Wolff, K. K.   +17 more
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Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials

Yankuang ceshi, 2018
BACKGROUND Niobium-tantalum concentrate reference materials play an important role in monitoring mineral smelting and sample analysis. There is a great demand of niobium-tantalum concentrate reference materials in the dressing plant and metallurgical ...
ZHAO Xiao-liang, LI Zhi-wei, WANG Ye, WANG Jun-yu, ZHONG Wei-lu, CHEN Yan   +5 more
doaj   +1 more source

A thermostable trilayer resist for niobium lift-off

, 1999
We have developped a novel lift-off process for fabrication of high quality superconducting submicron niobium structures. The process makes use of a thermostable polymer with a high transition temperature T_{g}= 235 C and an excellent chemical stability.
B. Pannetier, Beaumont, Burke, Courtois, Dolan, Halbritter, Harada, Hoss, Howard, P. Charlat, P. Dubos, P. Paniez, Paniez, Th. Crozes, van der Zant   +14 more
core   +1 more source