【摘要】 利用高温高压温度梯度法制备的优质六面体金刚石大单晶样品进行了颜色均一性、拉曼光谱和红外光谱表征,并与国外著名金刚石公司元素六和日本住友电气公司的优质六面体金刚石单晶样品性能进行了比较。就颜色均一性而言,跟国外样品相比,我们的金刚石样品颜色黄色相对更加均匀,而元素六样品中存在明显的浅色{110}生长区域;样品的1332 cm-1金刚石拉曼峰半宽要小于元素六样品,但大于日本住友金刚石样品;显微红外对金刚石样品中氮含量测试结果发现,金刚石样品氮含量在240 ppm左右,远远高于日本住友公司和元素六公司,这可能与金刚石单晶的生长速度最快有直接关系。更多还原

【Abstract】 With observation of color uniformity,Micro-Raman spectroscopy and Micro-infrared spectroscopy measurements,the charaterization is carried out on high-quality large cubic diamond crystal samples grown by temperature gradient method under HPHT in our lab,and the measurement results are compared with these of diamond samples from Element Six and Japan Sumitomo Corporations.In view of color uniformity,the yellow color of our samples is more uniform,and in the sample of Element Six,near-colorless {110} growth sectors could be observed clearly.The Raman FWHW of 1332 cm-1 peak of our diamond sample is smaller than that of Elment Six,but bigger than that of Sumitomo.The nitrogen content of our diamond samples is about 240ppm,much higher than that of sumitomo’s and element six’ s,and maybe,it is related directly to the highest growth rate of our diamond samples.更多还原