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摘要: 采用金刚石对顶砧及原位同步辐射实验技术,对高温高压有机催化反应制备的氮化碳材料,进行了室温及直到44 GPa压力条件下的原位高压同步辐射X射线衍射研究,并用最小二乘法拟合了样品的Murnaghan型等温状态方程。结果表明,在室温及直到44 GPa压力条件下,石墨相C3N4和待定的正交相CN材料都是稳定的,没有发生明显的相变,推测正交相CN材料可能是原始材料三聚氰胺和三聚氰氯在高温高压条件下催化热解产生的某种高分子有机聚合物。Abstract: In situ synchrotron radiation X-ray diffaction studies under high pressures and room temperature on the CN samples produced under 1 200 ℃ and 6.0 GPa have been carried out via the diamond anvil cell (DAC) technique. The results show that at room temperature and up to 44 GPa, both graphitic C3N4 and the unidentified orthogonal CN phase are stable.p-V data of both the two materials have been fitted to Murnaghan equation of state by using the least square method.
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