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单词 niobium
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Examples ofniobium

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In 1981, the latest year for which data are available, that industry used 165,000 tonnes of manganese, 890 tonnes of vanadium and 490 tonnes ofniobium.
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The complex includes a uranium deposit and a large reserve of rare earth elements, zirconium,niobiumand beryllium.
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Two layers were made ofniobium, the third of lead-indium-gold alloy.
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The region also has one of the largestniobiumreserves in the world.
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During the analysis of the mineral tantalite he concluded that it does contain an element similar toniobiumand tantalum.
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He also carried out researches onniobium, tungsten, uranium, perchloric acid, and the solubility of ammonia.
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The term is usually used to describe metal centers, commonly the early transition metals such as titanium,niobium, and tungsten.
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Niobiumandniobiumcarbide dissolves in steel at very high temperatures.
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At some cooling regimes,niobiumcarbide does not precipitate, and the steel then behaves like unstabilized steel, forming chromium carbide instead.
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The tungsten carbide is combined with other carbides such as titanium carbide,niobiumcarbide, and chromium carbide and sintered together with a cobalt matrix.
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Niobiumhas physical and chemical properties similar to those of the element tantalum, and the two are therefore difficult to distinguish.
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Although alloys contain only a maximum of 0.1%, that small percentage ofniobiumimproves the strength of the steel.
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It is composed of calcium, uranium, titanium,niobium, tantalum, and oxygen.
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Copper, titanium, vanadium, andniobiumare added for strengthening purposes.
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For this reason,niobiumis found in many medical devices such as pacemakers.
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The province is also the world's second largest producer ofniobiumand the third of titanium dioxide.
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Thin coatings can be used in superconducting radio frequency cavities to minimize energy loss and reduce the inefficiency of liquid helium cooledniobiumcavities.
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Some refractory metals include molybdenum,niobium, tungsten, and tantalum.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2024/12/27 19:26:52