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摘要: 选黑索今炸药(RDX)为高温高压源、双氰胺(C2H4N4)为主要前驱体,采用爆炸冲击法制备含 C N 的氮化碳粉末,利用扫描电子显微镜(SEM)、X射线衍射(XRD)、傅立叶红外光谱(FTIR)和X射线能 谱(EDS)分析制得的氮化碳产物的形貌、成分和结构。结果表明:冲击波作用下,前驱体中C?N 及CN 发生断键,得到碳氮单键直接相连的C3N4 晶体。氮化碳粉末的XRD分析结果表明,有-C3N4、-C3N4 和石 墨相C3N4 存在;利用扫描电子显微镜观测到粒度为2m 的六边形-C3N4 晶粒。在前驱体中添加5-氨基四 氮唑(CH3N5)可有效提高产物的氮含量。Abstract: Carbonnitridepowderswith C N bondswerepreparedbytaking1,3,5-trinitro-1,3,5- triazacyclohexane(RDX)asthehigh-temperature,high-pressuresourceaswellasdicyandiamide (C2H4N4)astheprimaryprecursor.Themorphology,compositionandstructureoftheproducts werecharacterizedbyusingscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),Fourier transforminfrared(FTIR)andX-rayphotoelectronspectroscopy(EDS).Theresultsshowthatall the C?N bondsandthegreatmassofthe CN bondsintheprecursoraredestroyedandturned intoC3N4crystalmainlywith C N bonds.XRDresultssuggestthattheproductincludes-C3N4, -C3N4andgraphite-C3N4crystals.Somehexagonalparticlesof2minsizeareobservedinthescanningelectronmicroscopy. Nitrogencontentintheproductscanbeeffectivelyimprovedbyadding5- aminotetrazole(CH3N5)inprecursors.
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Key words:
- mechanicsofexplosion /
- carbonnitride /
- shocksynthesis /
- dicyandiamide /
- RDX
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