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    • 5. 发明公开
    • METHOD FOR PREPARING DIAMOND FROM GRAPHITE BY INNER SHELL ELECTRON EXCITATION
    • 用于生产金刚石碳素通过电子内壳的激发
    • EP1522530A1
    • 2005-04-13
    • EP03756109.9
    • 2003-05-22
    • Japan Science and Technology Agency
    • YOSHIDA, HiroshiNAKAYAMA, Hiroyuki
    • C03B29/04
    • C30B29/04C01B32/25C30B1/00
    • If a stable graphite structure is reversed to a stable diamond structure using some excited state established at normal temperature and pressure, graphite can easily be transformed into diamond. If this technique is realized, it is expected to be applied to nanotechnology, short-wavelength, high-power semiconductor lasers, and high-power electronics.
      A method for producing diamond includes the step of exposing single-crystal or polycrystalline graphite having an sp 2 structure to one selected from the group consisting of synchrotron radiation X-rays, radiation, laser light, an electron beam, and accelerated multicharged ions under normal pressure to excite the 1s inner-shell electrons of carbon atoms (C) constituting the graphite, thereby producing diamond having an sp 3 structure from the graphite having the sp 2 structure. The method inexpensively produces single-crystal diamond, polycrystalline diamond, or nanostructural diamond in a large amount.
    • 如果稳定的石墨结构使用在正常温度和压力下建立了一些激发态扭转到一个稳定的金刚石结构,石墨可以易于转换成金刚石。 如果该技术被实现,因此预计将被施加到纳米技术,短波长,高功率半导体激光器和高功率电子器件。 一种用于制备金刚石方法包括暴露单晶或具有多花<2>多晶石墨的台阶结构,以一个选自同步辐射X射线,放射线,激光的选择,电子束, 和加速多电荷离子在常压下,以激发1S构成石墨的碳原子(C)的内壳层电子,从而产生具有从具有SP <2>结构的石墨,SP <3>结构金刚石。 该方法廉价地生产单结晶金刚石,多晶金刚石或纳米金刚石结构中大量。