八面体金刚石单晶的制备与性能

Preparation and properties of octahedral diamond single crystal

通过优化触媒配方,添加新型催化剂,设计合成工艺,改进保温腔体,开发出具有特定{111}面的八面体金刚石单晶,并实现对其粒度及晶型的调控。扫描电子显微镜表征结果显示金刚石晶型为八面体,晶体具有规则的{111}晶面。拉曼光谱结果证明金刚石晶体中碳原子的杂化类型为sp3杂化,且八面体金刚石具有更高的纯净度。磁化率测试结果显示该八面体金刚石磁化率低于1.00×10^-5 SI。使用该类金刚石制成的修整工具比使用普通金刚石的具有更好的锋利度和耐磨性。

Octahedral diamond single crystals with specific{111}plane were synthesized by optimizing catalyst formula,adding new catalyst,designing synthesis process and improving heat preservation chamber.The results of SEM indicate that the diamond crystal is octahedral,and the crystal has regular{111}facet.The results of Raman spectra show that the hybrid type of carbon atoms in diamond crystal is sp3 hybridization state,and that octahedral diamond has higher purity.The magnetic susceptibility test results show that the magnetic susceptibility of the octahedral diamond is lower than 1.00×10^-5 SI.The application results show that dressing tools with this diamond have better sharpness and wear resistance than that with normal diamond.