原子能科学技术2015，Vol.49Issue(12)：2282-2287,6.DOI:10.7538/yzk.2015.49.12.2282
预处理温度对聚碳硅烷粒子炉内成球性的影响
Effects of Pre-heating Temperature for Polycarbosilane on Preparing Capsule with Drop-tower Technique
摘要
Abstract
The SiC hollow microspheres with the diameter of 200-400 μm and the thick-ness of 3-5 μm were fabricated by drop-tower technique using polycarbosilane (PCS) as raw material ,and the best furnace conditions and the effects of pre-heating temperature on preparing capsules were investigated in this paper .The obtained microspheres were characterized to study the relationships between their productivities ,qualities and the pre-heating temperatures .The results show that the microspheres fabricated at 500 ℃with 25% Ar and 75% He as the inner furnace gas condition possess the highest capsule productivity ,and the best sphericity , concentricity and surface finishment . Further-more ,some of the PCS with low molecular weight and other small molecules were elimi-nated in the pre-heating treatment process , w hich could reinforce the polymerization degree of PCS and enhance the thermo-stability and ceramic yield of the raw materials . Therefore ,the productivity of the microspheres promotes while the surface roughness decreases with the increasing of pre-heating temperature at the best inner furnace condi-tion .Especially ,the microspheres prepared with PCS pre-heating at 350 ℃ possess the greatest quality .关键词
聚碳硅烷/预处理温度/炉内成球技术/SiC空心微球Key words
polycarbosilane/pre-heating temperature/drop-tower technique/SiC hol-low microsphere分类
化学化工引用本文复制引用
肖建建,李婧,李波,冯建鸿,韦建军..预处理温度对聚碳硅烷粒子炉内成球性的影响[J].原子能科学技术,2015,49(12):2282-2287,6.基金项目
中国工程物理研究院科学技术发展基金资助项目(2013B0302053) （2013B0302053）
