高压热处理石墨-六角氮化硼微晶混合物的结果分析

 为了进一步研究用球磨法制备B-C-N物质的规律性，在4.5~5.8 GPa压力、800~1 300 ℃温度条件下，对用球磨法获得的石墨-六角氮化硼微晶混合物进行高压热处理。热处理后产物的XRD、XPS及FT-IR测试表明：在4.5 GPa、800 ℃时，样品中出现部分hBN晶化现象，但石墨仍然保持微晶状态；当温度升到1 300 ℃时，样品中不仅存在晶化的hBN，而且出现一种类石墨结构的B-C-N三元化合物。与相关研究资料对比后认为：这一新化合物近似于BC₃N。压力增加到5.8 GPa而温度保持1 300 ℃时，结果变化不大。

Analysis of Graphite-Hexagonal Boron Nitride (g-hBN) Micro-Crystal Mixture Treated under High-Pressure and High-Temperature

For further research of the regularity of B-C-N material prepared by ball-milling method, the micro-crystal mixture of graphite-hexagonal boron nitride (g-hBN) is heat-treated under the pressure of 4.5~5.8 GPa and the temperature of 800 ℃~1 300 ℃. XRD, XPS and FT-IR analysis of the heat treated products shows: at 4.5 GPa and 800 ℃, there is partial crystallization of hexagonal boron nitride (hBN) in samples, but the graphite keeps the status of micro-crystallization; and at 1 300 ℃, samples not only have crystallization of hBN but also have ternary compound of B-C-N, which is analogous to graphite structure. We considered that the new compound was approximate to BC₃N when we had compared with correlative information of studies. When the pressure is up to 5.8 GPa and the temperature stays at 1 300 ℃, the changes of result are less.