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郑州大学/南京大学Nature: 块体六方金刚石

  • 2026-03-31 08:55:12
郑州大学/南京大学Nature: 块体六方金刚石
2026年3月4日，Nature在线发表了郑州大学单崇新教授、程少博教授、杨西贵教授和南京大学孙建教授课题组的研究论文，题目为《Bulk hexagonal diamond》，论文的第一作者为Shoulong Lai、Xigui Yang和Jiuyang Shi。

被誉为“终极半导体”的立方金刚石（CD）在科学界和工业界均引起了广泛关注。而它的同质异形体——六方金刚石（HD）则更为引人入胜，这得益于其与陨石撞击相关的迷人特性。然而，由于尚无确凿的实验证据证实六方金刚石的存在，其物理性质在很大程度上仍有待探索。

在此研究中，作者报道了通过沿c轴压缩高定向热解石墨（HOPG）并在高温条件下，成功合成毫米尺寸、纯相的六方金刚石。结合先进的结构表征与理论模拟，证实了六方金刚石的身份，并阐明了从石墨的转变路径。块体六方金刚石展现出略高于立方金刚石的硬度以及高热稳定性。这些发现解决了关于六方金刚石作为独立碳相是否存在的长期争议，并为石墨到金刚石的相变提供了新见解，为六方金刚石在未来先进技术应用中的研究与实践铺平了道路。

图1 石墨的X射线衍射图谱与压力-温度相图
图2 在20 GPa和1300 °C条件下回收得到块体六方金刚石的原子结构
图3 基于机器学习势的高定向热解石墨(HOPG)到六方金刚石转变过程的大规模分子动力学模拟
图4 块体六方金刚石的机械性能与热学性质
【论文链接】
Lai, S., Yang, X., Shi, J. et al. Bulk hexagonal diamond. Nature, 2026. https://doi.org/10.1038/s41586-026-10212-4
投稿日期：2024年11月17日
接收日期：2026年01月29日

【相关文献】

北京高压科学研究中心/中科院西安光机所Nature: 块体六方金刚石的合成

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  139. /yingpanguazai/ssd/ssd1/www/i.460.net.cn/runtime/temp/ea612fc1da910b74827694dd9af81119.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/i.460.net.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000418s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000624s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000273s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000268s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000545s ]
  6. SELECT * FROM `set` [ RunTime:0.000199s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000596s ]
  8. SELECT * FROM `article` WHERE `id` = 490537 LIMIT 1 [ RunTime:0.000354s ]
  9. UPDATE `article` SET `lasttime` = 1775441431 WHERE `id` = 490537 [ RunTime:0.005839s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000295s ]
  11. SELECT * FROM `article` WHERE `id` < 490537 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000484s ]
  12. SELECT * FROM `article` WHERE `id` > 490537 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002473s ]
  13. SELECT * FROM `article` WHERE `id` < 490537 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000975s ]
  14. SELECT * FROM `article` WHERE `id` < 490537 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009168s ]
  15. SELECT * FROM `article` WHERE `id` < 490537 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.012599s ]
0.102891s