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本文介绍了一种用于激光状态方程实验冲击波延时的密度梯度气凝胶飞片靶的制备及表征方法。以间苯二酚和甲醛为原料,去离子水为溶剂,碳酸钠为催化剂,在溶胶-凝胶工艺的基础上采用逐层凝胶和微模具成型工艺,经过脱模、乙醇替换和真空干燥,制备了4层密度梯度渐变间苯二酚-甲醛(RF)有机气凝胶飞片靶,并使用傅里叶红外光谱仪、扫描电子显微镜、X射线相衬成像仪和比表面积及孔隙分析仪对飞片靶的成分、形貌、密度、层间界面耦合情况及微观结构进行表征。实现了总体厚度约120μm、单层厚度一致、各层均匀性良好且密度变化范围约400～1 200mg/cm3的4层密度梯度RF气凝胶飞片靶的制备和表征。
This paper presents a method for the preparation and characterization of a density-gradient airgel flyer target for experimental shockwave delay in laser state equations. Using resorcinol and formaldehyde as raw materials, deionized water as solvent and sodium carbonate as catalyst, using layer-by-layer gel and micro-mold forming process on the basis of sol-gel process, after stripping, ethanol replacement and vacuum drying , Four layers of density gradient graded resorcinol-formaldehyde (aerogels) organic airgel flyer targets were prepared and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray phase contrast imager and specific surface area and pore analyzer The composition, morphology, density, interfacial interface coupling and microstructure of the flying target were characterized. The preparation and characterization of a four-layer density gradient RF airgel flyer with an overall thickness of about 120μm, uniform thickness of the single layer, good uniformity of the layers and a density range of about 400 ~ 1 200mg / cm3 were achieved.