干凝胶法制备惯性约束聚变靶用大直径空心玻璃微球  

PREPARATION OF LARGE-DIAMETER HOLLOW GLASS MICROSPHERES WITH DRIED GEL METHOD FOR INERTIAL CONFINEMENT FUSION TARGETS

作　　者：漆小波[1] 李波[1] 陈素芬[1] 张占文[1] 师涛[1] 初巧妹[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《硅酸盐学报》2010年第4期718-724,共7页Journal of The Chinese Ceramic Society

基　　金：高温高密度等离子体物理国防科技重点实验室基金(9140C6806030908)资助项目

摘　　要：为实现惯性约束聚变靶用大直径空心玻璃微球的干凝胶法制备,从数值模拟和工艺实验2个方面研究了发泡剂种类及含量、炉内载气组分、压力和温度对大直径空心玻璃微球制备过程的影响。结果表明:采用碱金属的乙酸盐作为发泡剂可以显著提高干凝胶粒子的发泡效率,提高载气中的氦气含量和升高炉温可以提高干凝胶粒子在吸热阶段的升温速率、更为迅速有效地完成封装过程,从而有利于大直径空心玻璃微球的制备。虽然降低载气压力有利于显著增大空心玻璃微球的直径,但是空心玻璃微球的品质急剧下降。当载气中氦气的体积分数为50%～80%、载气压力为(0.75～1.0)×105Pa、炉温为1500～1700℃时,干凝胶粒子的成球率较高、大直径(700～1000μm)空心玻璃微球的球形度、同心度和表面光洁度较好。The effects of process parameters（such as gel particle properties,furnace temperature,pressure and composition of furnace atmosphere） on the diameter of hollow glass microspheres（HGMs） for inertial confinement fusion（ICF） targets with dried gel method were investigated by the numerical simulation and the experiments.The results show that alkali acetates,as a blowing agent in gel particles,have a higher blowing efficiency rather than urea,and that the increase of the furnace temperature and the content of helium gas in the furnace atmosphere can increase the heating-up rate of gel particles in heat-absorbing stage and then complete the encapsulation process more effectively.The large-diameter HGMs could be produced with a higher yield.Although the decrease of the furnace atmosphere pressure could increase the HGMs＇ diameter,the quality of the HGMs descended quickly with furnace atmosphere pressure.The large-diameter HGMs with the size of 700–1000 μm and the high spherical morphology could be obtained at the volume fraction of helium gas in the furnace atmosphere ranging from 50% to 80%,the furnace atmosphere pressure ranging from 0.75×10^5 to 1.0×10^5 Pa,and the furnace atmosphere temperature ranging from 1500 to 1700℃.

关 键 词：空心玻璃微球 干凝胶法 大直径 发泡效率 惯性约束聚变 

分 类 号：TQ171.79[化学工程—玻璃工业] TQ171[化学工程—硅酸盐工业]