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草酸鎳前驅(qū)體纖維微結(jié)構(gòu)誘導(dǎo)制備多晶態(tài)納米鎳?yán)w維的演化機(jī)理
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西南科技大學(xué)工程技術(shù)中心,四川大學(xué),西南科技大學(xué)

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Guidance evolution mechanism of nickel oxalate micro-structure for formation of polycrystalline nano-sized nickel fibers
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Center of Engineering and Technology,Southwest University of Science and Technology,College of Materials Science and Engineering,Sichuan University,Analytical and Testing Center,Southwest University of Science and Technology

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    摘要:

    在離子液相沉淀體系中,通過受限自組裝生長可控制備草酸鎳納米纖維。在氬氣環(huán)境中,在纖維微結(jié)構(gòu)誘導(dǎo)下,通過熱分解草酸鎳?yán)w維制備出鎳納米纖維。通過X射線衍射儀、掃描電鏡和透射電鏡等技術(shù)檢測所得樣品的性質(zhì)。結(jié)果表明,氨的存在使草酸鎳的生長習(xí)性從自由自組裝模式轉(zhuǎn)變?yōu)榱耸芟拮越M裝模式,制備的草酸鎳?yán)w維具有單斜晶體結(jié)構(gòu),直徑100-200nm,長度為1-5μm。 熱分解制備的鎳?yán)w維表面粗糙,具有面心立方晶體結(jié)構(gòu),直徑100-200nm,長度為1-5μm。在草酸鎳?yán)w維形成的細(xì)而長空間的誘導(dǎo)作用下,鎳原子經(jīng)過成核、生長和聚合過程,從而形成纖維狀納米鎳。

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    Nickel oxalate nano-fibers were controlled synthesized via a restricted self-assembly growth process in liquid phase precipitation system. Nickel nano-fibers were prepared by decomposing nickel oxalate under the guidance of fiber micro-structure, in Ar gas atmosphere. The characteristics were measured by the techniques of X-ray powder diffraction, Scanning Electron Microscope and Transmission Electron Microscopy. As a result, the existence of ammonia changed the growth behavior of nickel oxalate from free self-assembly mode to restricted one. The nickel oxalate crystal nano-fibers with monoclinic geometry were about 100-200nm in diameter, 1-5μm in length. The nickel nano-fibers with face-centered cubic geometry were also about 100-200nm in diameter, 1-5μm in length, which surface was very rough. Nickel nano-fibers formed via a process of nucleation, grain growth and aggregation under the guidance of long and narrow space provided by nickel oxalate nano-fibers.

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李濤,劉穎,馬國華.草酸鎳前驅(qū)體纖維微結(jié)構(gòu)誘導(dǎo)制備多晶態(tài)納米鎳?yán)w維的演化機(jī)理[J].稀有金屬材料與工程,2017,46(9):2371~2374.[LI Tao, LIU Ying, MA Guohua. Guidance evolution mechanism of nickel oxalate micro-structure for formation of polycrystalline nano-sized nickel fibers[J]. Rare Metal Materials and Engineering,2017,46(9):2371~2374.]
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  • 收稿日期:2015-09-05
  • 最后修改日期:2016-01-27
  • 錄用日期:2016-03-30
  • 在線發(fā)布日期: 2017-11-29
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