共查询到18条相似文献,搜索用时 46 毫秒
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以PS为模板的RF气凝胶空心微球制备 总被引:1,自引:1,他引:0
采用聚苯乙烯(PS)空心微球为模板,间苯二酚/甲醛(RF)为前驱体溶液,邻苯二甲酸二丁酯为分散剂,以界面聚合反应为基础合成PS-RF核壳双层球,用丙酮去除模板,制得RF空心微球.分别采用红外光谱、X光显微分析、透射电镜(TEM)、N2吸附-脱附和原子力显微分析,对RF空心微球成分、形貌、孔径、表面粗糙度等进行表征.结果表明:RF为单层空心球壳,具有典型的气凝胶多孔结构,由粒径约为10 nm且粒度分布较为均匀的纳米粒子构成,平均孔径约为17 nm,球形度和同心度达到95%以上,表面光洁度小于10 nm,达到了快点火靶的基本要求. 相似文献
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为实现惯性约束聚变(ICF)靶用高品质空心玻璃微球(HGM)的干凝胶法制备,从数值模拟和工艺实验两个方面研究了载气压力对干凝胶粒子炉内成球过程及最终HGM品质的影响。结果表明,随着载气压力的降低,HGM的直径增大、壁厚变薄。降低载气压力虽有利于延长液态空心玻璃微球的精炼时间,但载气与液态空心玻璃微球之间的传热能力也显著降低。因此,HGM的精炼程度随着载气压力的降低而下降,当载气压力低于0.5×105Pa时,HGM的精炼程度不能满足ICF制靶的要求。 相似文献
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炉内成球技术制备PS-PVA双层球 总被引:1,自引:0,他引:1
本工作研究采用炉内成球技术制备惯性约束聚变用靶丸聚苯乙烯-聚乙烯醇(PS-PVA)双层球。以乳液法制备PS微球,利用炉内成球技术在PS微球表面制备PVA层。研究表明,在PVA质量浓度为5%、炉内为空气、炉温473~523K条件下,可制备出PS-PVA双层球。双层球直径范围250~550μm,PVA层厚度范围1.0~2.4μm,PS-PVA双层球表面光洁度3~10nm,微球充氩气的最低温度350~360K,室温条件下对氘气的保气半寿命1~5h。 相似文献
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激光惯性约束聚变裂变混合能源包层中子学数值模拟 总被引:1,自引:1,他引:0
对三维输运与燃耗耦合程序MCORGS进行了适应性改造,并对利弗莫尔实验室提出的激光惯性约束聚变裂变混合能源(LIFE)概念进行了分析和改进。输运计算采用MCNP程序,燃耗计算采用ORIGENS程序,增加氚控制模块和功率控制模块。建立了与LIFE等价的以贫化铀为燃料、Be为中子增殖剂的包层方案,通过数值模拟验证了MCORGS程序的可靠性。针对Be资源短缺及冷却复杂问题,设计了以贫化铀为燃料、Pb为中子增殖剂的包层方案,包层能量放大了4倍,可在55a内稳定输出2 000 MWt功率。 相似文献
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在惯性约束核聚变冰层均化实验阶段,观测到充气管内冰晶无法保持,从而不能堵管,靶丸直接与高温氘气源连接,无法继续实验。为解决难以堵管的问题,本文建立了三维冷冻靶系统计算模型,研究了辐射条件下屏蔽罩温度、封口膜透射率及铝套筒表面发射率等因素对冷冻靶靶丸表面及充气管沿程温度特性的影响规律。结果表明:改变封口膜透射率能有效降低靶丸与充气管连接处的温度,在本文讨论的边界条件下,封口膜透射率大于0.025时靶丸与充气管连接处温度相对较低,晶核可维持,充气管能被堵管;而改变屏蔽罩温度及铝套筒表面发射率等做法对靶丸与充气管连接处的温度降低作用不明显,充气管无法被堵管。 相似文献
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During the ice-laying period, a phenomenon is observed that the ice crystal could not be maintained in the filling tube, which results in the direct connection between the capsule and the deuterium source at high temperature. In this paper, a 3D cryogenic target model was established to study the influence of several factors on the temperature along capsule surface and filling tube. The results show that changing the transmittance of the sealing film can effectively solve the problem of being unable to block the filling tube, while changing the shield temperature and the surface emissivity of the aluminum enclosure has no obvious effect on that problem. It is found that the crystal can be maintained in the filling tube under the boundary conditions discussed in this paper with the transmittance of the sealing film greater than 0.025. 相似文献
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《等离子体科学和技术》2015,17(10):842-846
The re-emitted images of the frame camera indicated that the high-Z(Bi) capsule deviated about 29 μm from the center of the hohlraum in experiments at the Shenguang-II(SG-II)laser facility; however, investigations on this issue have seldom been performed. The influence of three dimensional offsets of a capsule on its radiation asymmetry in inertial confinement fusion(ICF) will be analyzed in this paper. Simulations demonstrate that the axial offset of 100 μm of a capsule from the center of the hohlraum brings an additional 3.5% radiation drive asymmetry and 6.5% P_1 asymmetry(Legendre odd model) on the capsule in the SG-II laser facility, and the offset must be within 25 μm if the P_1 asymmetry is restricted to below 2%. 相似文献