Metal passivator can inhibit nickel and vanadium pollution on the catalytic cracking catalysts and improve the property of polluted catalysts.

金属钝化剂可以抑制镍和钒等金属对催化裂化催化剂的污染，使被污染催化剂的性质得到改善。

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To remove dissolved oxygen in the molten metal prior to pouring, elements have been added which have high affinity for oxygen such as titanium, vanadium, niobium and magnesium.

为了在浇铸之前消除熔化金属中的溶解氧，需要在金属中添加具有很高的氧亲合力的元素，如钛，钒，铌和镁。

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At a critical temperature, vanadium oxide films undergo phase transition between metal phase to semi-conducting phase.

在某一特定的温度处，氧化钒薄膜发生金属-半导体相的转变。

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