人工合成金刚石技术比较

静压法是当前工业合成金刚石的主要的合成手段，合成工业用金刚石主要采用静压法中的静压触媒法，合成宝石级金刚石主要采用静压晶种触媒法生产，通过静压法中的直接变换法，纯净的多晶石墨棒可以在短时间内转化为多晶金刚石，二十世纪八十年代还出现了一种在低压下生长金刚石的新方法——化学气相沉积法(CVD)，目前只能用于制备金刚石薄膜，本文通过总结比较各种金刚石合成技术，提出了利用激光控制金刚石生长的设想，使用这种方法将提高金刚石的质量，

Man-made Diamond Technique Comparison

Static high-pressure method is the main technique to synthesize diamond in industry.Generally,industrial diamonds are synthesized by graphite with metal catalyst under high-pressure and high-temperature,and gem-quality diamonds are synthesized by using seed crystal under high-pressure and high-temperature.Ultra hard polycrystalline diamond can be synthesized from graphite by direct conversion under static high pressure.A new technique,chemical vapor deposition method,appeared in the 80s,but it is only used to synthesize diamond films now.By comparing these techniques,we designed a device to control the growth of diamond by high-energy laser.By this way,the diamond's quality can be increased.