北京高压科学研究中心利用激光加热技术高温高压合成纳米金刚石高压舱数据集（2021-2022）

首次利用搭建的双面激光加热系统，将含有压缩于纳米孔道内的挥发物的I型玻璃碳转化为纳米晶金刚石，成功合成了能够永久保存高压相易挥发物的独立纳米结构金刚石高压舱（NPD）。即使将金刚石体系释放至常压环境条件下，也能够实现挥发物的永久保存。在北京高压科学研究中心完成装样、充气和激光加热合成实验。将玻璃碳原料抛光至约15 μm厚的薄片后装入DAC中。利用充气装置将高纯氩气充入压机内，并使用NaCl或MgO作为绝热层。将样品体系加压至25–53 GPa，利用双面激光加热系统加热至1800–2200 K以获得样品。同步辐射原位高压XRD测试在美国阿贡国家实验室先进光源（APS）13-ID-D和16-ID-B线站，以及上海SSRF光源15U1线站进行，所用光源波长包括0.6199 Å、0.4066 Å、0.3738 Å和0.2952 Å。数据初步还原使用Dioptas软件，并在GSAS中进行精修分析。同步辐射原位高压SAXS实验在APS的12-ID-B线站完成，能量为14 keV，光束尺寸为20 × 150 μm²，数据采用MATLAB集成软件进行积分和还原。该研究模拟了金刚石包裹体可能的形成过程，为地球深部小分子挥发物的赋存状态提供了潜在的解释路径。

For the first time, using a home-built dual-sided laser heating system, we converted type I glassy carbon containing volatiles confined within nanopores into nanocrystalline diamond, successfully synthesizing freestanding nanostructured diamond pressure vessels (NPD) that can permanently preserve high-pressure volatile phases. Even when the diamond system is released to ambient atmospheric conditions, permanent preservation of the encapsulated volatiles can still be achieved. The sample loading, gas charging and laser heating synthesis experiments were completed at the Beijing High Pressure Science Research Center. The glassy carbon raw material was polished into thin flakes with a thickness of approximately 15 μm and then loaded into a diamond anvil cell (DAC). High-purity argon gas was charged into the press using a gas charging device, and NaCl or MgO was employed as the insulating layer. The sample system was pressurized to 25–53 GPa and heated to 1800–2200 K via the dual-sided laser heating system to obtain the target samples. Synchrotron radiation in-situ high-pressure X-ray diffraction (XRD) measurements were conducted at beamlines 13-ID-D and 16-ID-B of the Advanced Photon Source (APS) at Argonne National Laboratory in the United States, as well as beamline 15U1 of the Shanghai Synchrotron Radiation Facility (SSRF). The incident X-ray wavelengths used included 0.6199 Å, 0.4066 Å, 0.3738 Å and 0.2952 Å. The raw data was initially reduced using the Dioptas software, followed by refinement and analysis in GSAS. Synchrotron radiation in-situ high-pressure small-angle X-ray scattering (SAXS) experiments were completed at beamline 12-ID-B of APS, with an incident beam energy of 14 keV and a beam size of 20 × 150 μm². The data was integrated and processed using MATLAB-based integrated software. This study simulated the plausible formation process of diamond inclusions, providing a potential explanatory framework for the occurrence states of small-molecule volatiles in the Earth's deep interior.

搜集汇总

背景与挑战

背景概述

该数据集记录了北京高压科学研究中心利用双面激光加热系统在高温高压条件下合成纳米晶金刚石高压舱的实验数据。数据集包含同步辐射原位高压XRD和SAXS测试数据，数据以excel文件格式储存，命名方式包含谱图类型、最高压力和最高温度信息。研究为地球深部小分子挥发物的赋存状态提供了潜在的解释路径。