| 词汇 | niobium |
| 释义 | BETA Examples of niobiumniobium isn’t in the Cambridge Dictionary yet. You can help! 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 of niobium. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The complex includes a uranium deposit and a large reserve of rare earth elements, zirconium, niobium and beryllium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Two layers were made of niobium, the third of lead-indium-gold alloy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The region also has one of the largest niobium reserves in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. During the analysis of the mineral tantalite he concluded that it does contain an element similar to niobium and tantalum. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He also carried out researches on niobium, tungsten, uranium, perchloric acid, and the solubility of ammonia. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The term is usually used to describe metal centers, commonly the early transition metals such as titanium, niobium, and tungsten. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Niobium and niobium carbide dissolves in steel at very high temperatures. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At some cooling regimes, niobium carbide does not precipitate, and the steel then behaves like unstabilized steel, forming chromium carbide instead. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The tungsten carbide is combined with other carbides such as titanium carbide, niobium carbide, and chromium carbide and sintered together with a cobalt matrix. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Niobium has physical and chemical properties similar to those of the element tantalum, and the two are therefore difficult to distinguish. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Although alloys contain only a maximum of 0.1%, that small percentage of niobium improves the strength of the steel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is composed of calcium, uranium, titanium, niobium, tantalum, and oxygen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Copper, titanium, vanadium, and niobium are added for strengthening purposes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For this reason, niobium is found in many medical devices such as pacemakers. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The province is also the world's second largest producer of niobium and the third of titanium dioxide. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Thin coatings can be used in superconducting radio frequency cavities to minimize energy loss and reduce the inefficiency of liquid helium cooled niobium cavities. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Some refractory metals include molybdenum, niobium, tungsten, and tantalum. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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