摘要
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。
To fabricate high quality hollow glass microspheres（HGMs）by sol-gel technology for inertial confinement fusion（ICF）,the effects of furnace atmosphere pressure on the transformation process from gel particles to HGMs and the resulting quality of HGMs were investigated by numerical simulation and experiments.The results show that decreasing of furnace atmosphere pressure can increase diameter of HGMs and decrease wall thickness of HGMs.Decreasing furnace atmosphere pressure can extend the refining time of liquid HGMs,however,the heat transfer coefficient between liquid and furnace atmosphere pressure decreases significantly with the decreasing of furnace atmosphere pressure.As a result,the refining degree and the quality of HGMs descend quickly with furnace atmosphere pressure.When the furnace atmosphere pressure is lower than 0.5×10^5 Pa,the sphericity,concentricity and surface finish can not satisfy the restrict requirements of ICF targets.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2010年第9期1065-1070,共6页
Atomic Energy Science and Technology
基金
高温高密度等离子体物理国防科技重点实验室基金资助项目(9140C6806030908)
关键词
干凝胶法
空心玻璃微球
惯性约束聚变
靶制备
sol-gel technology
hollow glass microsphere
inertial confinement fusion
target fabrication
