靶用低密度聚4-甲基-1-戊烯泡沫的制备与表征
Preparation and characterization of low density poly 4-methyl-1-pentene foams for ICF
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摘要: 通过控制体系的受热历史,改进了惯性约束聚变靶材料聚4-甲基-1-戊烯(TPX)泡沫二元溶剂体系的制备工艺,并利用β射线检测和X射线照相技术,对不同制备工艺的泡沫柱进行密度分布表征。结果表明:两种方法检测的结果基本一致,即凝胶过程的冷却速率为1 ℃/min,且凝胶后采用淬冷使其快速固化的方法能制得密度分布均匀的低密度TPX泡沫样品,从而确定了均匀泡沫的最佳制备工艺。由于二元溶剂体系的超低密度TPX泡沫样品孔径太大,极个别大孔可达数百μm,均匀度极低,所以采用TPX的环己烷一元溶剂体系可以成功制备出最低密度达3 mg/cm3的超低密度TPX泡沫样品,且满足Z箍缩物理实验用靶的需求。Abstract: The preparation techniques for poly 4-methyl-1-pentene(TPX) foams in binary solvent system applied in ICF experiments have been improved through controlling the thermal history in preparation process. Beta radiation detecting and X-ray photographic technology were introduced to analyze the foam density in this system. The results of the two methods, which are consistent with each other, revealed that the optimized condition is to keep the cooling velocity in gelatin at 1 ℃/min and then quench it quickly. However, the pore size of super low density TPX foams prepared with this preparation techniques are very big, and the diameters of very few pores even reach hundreds of micron, so a single solvent system was used and the foams of lowest density 3 mg/cm3 for Z-pinch had been made. These fo
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Key words:
- inertial confined fusion /
- z-pinch fusion target /
- tpx foam /
- density uniformity
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