Author:
Cao Hong ,Huang Yong ,Chen Su-Fen ,Zhang Zhan-Wen ,Wei Jian-Jun , ,
Abstract
As one of the most important ignition capsules, the polyimide capsule was prepared by depolymerizable mandrels technique combined with vapor deposition polymerization method. Instead of the plane pan and piezoelectric vibration model, the mesh pan and pulse tapping was selected to reduce microsphere collision so that surface quality was improved in polyimide fabrication. Experimentsal and theoretical results show that the capsule surface becomes more rough because of collisions between microspheres and the pan. The mesh pan could reduce microsphere collisions, which was also reduced by changing piezoelectric vibration into pulse tapping. As a result, root-mean-square value ranges from 5293 nm to 2844 nm. There are many advantages with pulse tapping model, such as better controllability,lower bounce rate and less static; however piezoelectric vibration model is slightly better than the pulse taping in wall thickness uniformity. Measurements of single microsphere show that the deviation of the former is 0.68 which is better than that of the latter (0.73 m). For the average value of microspheres in the same batch, the former has a value 0.26 which also is better than the latter (0.57 m).
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
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