hafnium

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？

2. Chemical form of hafnium is perchlorate or nitrate.: 铪的化学形态为过氯酸盐或硝酸盐。

3. Mainly because the quantity of hafnium, utilized in one chip, is negligibly small.: 这主要是因为数量的铪，利用一个芯片，是微乎其微的小。

4. Specifically, the present invention provides a metal stack comprising a hafnium-based dielectric;: 具体地，本发明提供的金属叠层包括：铪基介质；

5. 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。

6. The hafnium crystal bar was produced by the iodide decomposition method from wast material of processing.: 用碘化物热分解法由铪加工残料生产铪晶棒。

7. The post-irradiation effects of 30% TBP-Kerosene-HNO3 systems have been investigated by means of the hafnium number test.: 本文借助铪指数实验研究了30％TBP-煤油-硝酸体系的辐照后效应。

8. The technology for separation of zirconium and hafnium is the key to prepare reactor-grade productions of zirconium and hafnium.: 锆铪分离技术是生产核级锆和核级铪的核心技术。

9. So the research of preparation of ceramic scintillators containing hafnium compounds or hafnium has been becoming more and more popular.: 因此制备铪化合物或含铪化合物的闪烁陶瓷，是近年的新材料研究热点之一。

10. Perhaps the most important use of sodium metal is as a reducing agent in producing high melting point metals, such as titanium and hafnium.: 也许金属钠最重要的用途是作为还原剂生产高熔点金属，比如钛和铪。

11. The first they dealt with by coating the top of the device with oxides of hafnium, molybdenum and titanium, in layers about 100 nanometres thick.: 第一，他们在装置的上处理和涂上铪，钼，钛氧化物层，这层物质仅有100纳米厚。

12. A new process of metallurgy of rare metals zirconium and hafnium with caustic soda instead of sodium carbonate to rub up zircon is examined.: 研究了以氢氧化钠代替碳酸钠拌和锆英砂冶炼锆、铪稀有金属的新工艺。

13. Gallium nitride is grown by plasma-assisted molecular-beam epitaxy on (111) and (001) silicon substrates using hafnium nitride buffer layers.: 氮化镓是增长了等离子体辅助(111)和分子束外延(001)硅衬底上氮化硅缓冲层使用铪。

14. A method for determination of hafnium in zirconium under Ar-O_2 controlled atmosphere was developed and the conditions of ratio of Ar-O_2, excited current and exposed time were optimized.: 研究了在氩氧控制气氛条件下锆中铪的分析条件，对氩氧比、激发电流、曝光时间等实验参数进行了选择。

15. A method for determination of hafnium in zirconium under Ar-O_2 controlled atmosphere was developed and the conditions of ratio of Ar-O_2, excited current and exposed time were optimized.: 研究了在氩氧控制气氛条件下锆中铪的分析条件，对氩氧比、激发电流、曝光时间等实验参数进行了选择。

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