强磁场碳黑催化法制备纳米新金刚石粉

在直流恒稳强磁场(10T)作用下，以纳米铁为催化剂，碳黑为碳源，在常压和1100℃下保温100min成功地制备出了类金刚石和新金刚石，并用XRD，TEM和Raman对制备的样品粉末进行表征．结果表明，样品粉末是由纳米类金刚石粉和石墨包覆新金刚石纳米颗粒组成，纳米类金刚石粉的大小为20nm，石墨包覆新金刚石的大小为100nm．     

离心倾液法与初晶Si的生长

本文首次提出了一种研究晶体生长的新方法－离心倾液法。用该方法获得了过共晶Ａｌ－Ｓｉ合金初晶的Ｓｉ的生长形貌，发现了初晶Ｓｉ存在错台阶生长机制，并且，借助该生长机制成功地解释了初晶Ｓｉ的分枝和初晶Ｓｉ包裹共晶组织的形成机理。此外，观察到了共晶体包裹初晶Ｓｉ生长的过程。     

新金刚石 sp3杂化转变的实验研究

With admixture of n-diamond and diamond-like carbon powders （DLC） as carbon source, transparent wafers have been synthesized by hydrothermal process at 100℃ and atmosphere pressure. Scanning electron microscopy, X-ray diffraction, Raman spectroscopy, transmission electron microscopy, electron-probe microanalysis and Fourier-transform infrared spectrometer were used to analyze those transparent wafers. These results indicated that the transparent wafers were amorphous sp^3-banding carbon wafer, and that the wafers were not aggregate of DLC from the carbon source but a new kind of reaction product by hydrothermal treatment.