高温高压处理增强化学气相沉积多晶金刚石的光学性能  

Enhanced optical properties of chemical vapor deposited polycrystalline diamond by high pressure and high temperature treatment

作　　者：郑林鹏 田毅 郭睿昂 贺端威[1] ZHENG Linpeng;TIAN Yi;GUO Ruiang;HE Duanwei(Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学原子与分子物理研究所,四川成都610065

出　　处：《超硬材料工程》2024年第6期1-10,共10页Superhard Material Engineering

基　　金：国家重点研发计划:高压下多尺度小量子复合体系量子效应及其调控(No.2018YFA0305900)。

摘　　要：增强化学气相沉积(CVD)金刚石的光学性能是学术界和工业界长久以来的追求。然而,CVD技术的壁垒限制了金刚石的应用领域。文章通过高温高压处理方法成功提高了CVD多晶金刚石的光学性能。使用光学显微镜、紫外-可见光吸收光谱和红外吸收光谱、拉曼光谱、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对CVD多晶金刚石在高温高压处理前后的微观结构进行了表征。结果表明,在10 GPa下,CVD金刚石的透明度随着处理温度的升高而显著增加,从最初的不透明提升到几乎完全的光学透明。通过光谱和微观结构分析,提出了高温高压条件下CVD多晶金刚石的改性机理。高温高压处理改善初始CVD多晶金刚石光学性能的同时降低了合成具有纯sp3键合的高透明度金刚石材料的技术难度,具有科学及应用上的双重意义。The enhanced optical properties of chemical vapor deposited(CVD)diamond have been pursued in academia and industry.However,the barrier of CVD technology limits the application field of diamond.Herein,the performance of CVD polycrystalline diamond was successfully improved by high-pressure and high-temperature(HPHT)treatment.The microstructures of CVD polycrystalline diamond before and after HPHT treatments were thoroughly examined using optical microscope,UV-visible and infrared absorption,Raman spectroscopy,scanning electron microscope(SEM)and transmission electron microscope(TEM).It is found that the transparency of the CVD samples at 10 GPa increases dramatically with processing temperatures,from the original opacity to almost full optical transparency.Through spectroscopic and microstructural analyses,the modification mechanism of CVD polycrystalline diamond under HPHT conditions is proposed.The HPHT treatment improves the optical properties of the initial CVD polycrystalline diamond while reducing the technical difficulty of synthesizing high transparency diamond materials with pure sp 3 bonding,which has dual scientific and practical significance.

关 键 词：CVD金刚石 透明度 高温高压 改性机理 

分 类 号：TQ164[化学工程—高温制品工业]