摘要
由聚碳硅烷粒子作为原料,通过粒子下落进入负压高温炉内,粒子达到流动状态,在发泡剂作用下内部起泡膨胀,最终得到空心微球.实验所用聚碳硅烷粒子尺寸为110～180 μm,载气为Ar/He(体积比为2:1),载气压力为0.09MPa.在这些固定条件下,研究了炉内温度对聚碳硅烷粒子成球性能的影响.结果表明:随着炉内温度从200℃升高到1 000℃,聚碳硅烷成球率、微球平均直径和表面光洁度先增加后下降,最高平均成球率为73%,最大平均直径为375μm,最好表面平均粗糙度Ra仅为0.7 nm.制备空心微球合适的温度约为700℃.
A hollow microsphere was fabricated with a commercial polycarbosilane （PCS） polymer particle by the method ol drop tower in a negative pressure and high temperature furnace. The effects of the furnace temperature on the formation of the microspheres were investigated at the given conditions, i.e. the PCS particle size is 110-118/,tin, the gas in the furnace is Ar/ He with 2 ： 1（in volume） ratio and the pressure of the gas is 0.09 MPa. Experimental results show that the production percentage, the diameter and the surface finish of microspheres increase at the beginning and decreases in the end with the increase of the furnace temperature from 200℃ to 1000℃. The maximum mean production percentage is 73%, the largest mean diameter is 375 μm, and the best surface finish, i.e. the mean roughness R,is 0. 7 nm. The optimum furnace temperature for the formation of microspheres is about 700℃, the compositions of the microspheres is polycarbosilane, amorphous SiC and free carbon.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第9期1085-1088,共4页
Journal of The Chinese Ceramic Society
基金
等离子体物理国家级重点实验室基金(51480030204ZW0801)资助项目
关键词
聚碳硅烷微球
炉内温度
惯性约束聚变
polycarbosilane microspheres
furnace temperature
inertial confinement fusion
