hafnium

• n. [化学] 铪（金属元素）

1. a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

And how is it known that Mars had hafnium - 187 ?

那么是如何知道火星有铪 -187 的 呢 ?

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This activator is acyl amine - the hafnium activator that ether is a foundation.

该催化剂为酰胺 - 醚为基础的铪催化剂.

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Chemical form of hafnium is perchlorate or nitrate.

铪的化学形态为过氯酸盐或硝酸盐.

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Why can you always have vexed thing hafnium?

为什么总是会有烦恼的事铪?

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Non hafnium superalloy DZ 4 , which is widely applied in service aero engines in present, is introduced.

介绍了目前在役发动机上使用最多的无铪定向凝固合金DZ4及其可铸性.

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The extraction separation process for zirconium and hafnium with MIBK was briefly reviewed in this paper.

简要评述了用甲基异丁基酮(MIBK)萃取分离锆铪方法的基本原理、分离工艺和条件、萃取设备.

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Despite its cure for leakage power, adding hafnium creates headaches for the process integration engineer.

添加铪基本解决了泄漏功耗问题, 不过铪也让工艺集成工程师头疼不已.

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来自拉丁语Hafnia,现丹麦首都哥本哈根拉丁语名，因这种金属元素于哥本哈根首次发现而得名，字面意思为港口，词源同haven,copenhagen.

1. And how is it known that Mars had hafnium - 187 ?

那么是如何知道火星有铪 -187 的 呢 ?

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2. The field emission properties of hafnium coated carbon nanotubes ( CNTs ) were investigated.

研究了表面沉积铪膜并进行后处理对碳 纳米管 膜场电子发射性能的影响.

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3. This activator is acyl amine - the hafnium activator that ether is a foundation.

该催化剂为酰胺 - 醚为基础的铪催化剂.

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4. Chemical form of hafnium is perchlorate or nitrate.

铪的化学形态为过氯酸盐或硝酸盐.

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5. Why can you always have vexed thing hafnium?

为什么总是会有烦恼的事铪?

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hafnium (n.)

rare element, 1923, Modern Latin, from Hafnia, Medieval Latin form of Danish Havn "harbor," the usual pre-1400 name of Copenhagen, Denmark, where the element was discovered by physicist Dirk Coster (1889-1950) and chemist George de Hevesy (1885-1966).