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用气相控制成核密度法 ,生长出了尺寸可达 5mm的C70 单晶 .X射线衍射分析及电子衍射分析结果表明C70 单晶在室温下为六方密堆积结构 (hcp)相与少量面心立方结构 (fcc)相共存 .用扫描电子显微镜和光学显微镜观察了C70 单晶的生长形貌 ,分析了形成机制 ,探讨了生长条件对C70 单晶生长形态的影响
C70 single crystal with the size up to 5mm was grown by gas-controlled nucleation density method.The results of X-ray diffraction (XRD) and electron diffraction (XRD) showed that the single crystal of C70 has a hexagonal close-packed structure (hcp) (Fcc) phase coexist.The growth morphology of C70 single crystal was observed by scanning electron microscopy and optical microscopy, and the formation mechanism was analyzed.The effect of growth conditions on the growth morphology of C70 single crystal was discussed