Results 91 to 100 of about 1,478 (213)
Journal of Materials Research and TechnologyIn the present work, we perform a few shock-wave-processing experiments on typical ceramic materials of β-MnMoO4 (P2/c) by the exposure of 0, 100 and 200 shocks, respectively, and investigated their structural, optical and morphological features to ...
Sivakumar Aswathappa +5 more
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, 2019 Nanostructured scheelite (CaWO4) was synthesized by calcination in air of enriched wolframite (Fe1-xMnxWO4) ore and calcium carbonate (CaCO3). The effects of process parameters such as milling conditions of the solid reactants, calcination in flowing or ...
Polini, R +3 more
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Relationship between flotation and Fe/Mn ratio of wolframite with benzohydroxamic acid and sodium oleate as collectors [PDF]
, 2014 Several studies revealed that flotation of wolframite changes with different Fe/Mn ratios, but they did not reach a consensus. This relationship in the presence of benzohydroxamic acid (BHA) and sodium oleate (NaOl) as collectors was studied in this ...
Gao, Yude +9 more
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Oxidative dehydrogenation of propane with cobalt, tungsten and molybdenum based materials
Revista Facultad de Ingeniería Universidad de Antioquia, 2017 Oxidative dehydrogenation of propane is a reliable alternative for olefins production. This paper presents the results obtained on oxidative dehydrogenation of propane by using two materials based on cobalt, tungsten, and molybdenum.
Maurin Salamanca-Gúzman +4 more
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Oxygen isotope fractionation in wolframite
European Journal of Mineralogy, 1992 Thermodynamic oxygen isotope factors for wolframite are calculated using the modified increment method and assuming a predominant contribution of the 18 O-increment in complex anion to the I- 18 O index of complex mineral. The oxygen isotope fractionation factors obtained between quartz, wolframite and water are : 10 3 ln α quartz-wolframite =0.38×10 ...
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The H/F ratio as an indicator of contrasted wolframite deposition mechanisms
, 2019 International audienceUnderstanding wolframite deposition mechanisms is a key to develop reliable exploration guides for W. In quartz veins from the Variscan belt of Europe and elsewhere, wolframites have a wide range of compositions, from hübnerite ...
Pichavant, Michel +3 more
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Yankuang ceshiLocated in the central region of Inner Mongolia, within the southern segment of the Daxing’anling-North China Craton metallogenic belt, the area is notable for its widespread distribution of alkaline granite-type niobium-tantalum (Nb-Ta) deposits ...
Feicui WANG +6 more
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Synthesis and Structural Investigation of Erbium-Doped ZnWO4 Nanocrystals [PDF]
Nanochemistry ResearchIn this study, ZnWO4:Er3+ nanocrystals were synthesized using a simple co-precipitation method. The structural properties of the prepared powders were characterized through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and ...
Forough Zunia +3 more
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Notes on wolframite, beraunite, and axinite
Proceedings of the United States National Museum, 1914 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Removal of silica and sulphur from wolframite concentrates
, 1997 Wolframite (FeWO4) concentrates of Rajasthan contain impurities like silica (SiO2) and sulphur in amounts, which are much above the desired specifications.
Khan, Z H, Premchand,, Saha, A K
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