Papers by Author: Chang Shu Xiang

Abstract: Well-dispersed SiO2 slurry with high solid content for aqueous tape casting was obtained by selecting the appropriate dispersant, binder, plasticizer and other additives. However, it is difficult to prepare well-dispersed CNTs/SiO2 slurry because CNTs tend to aggregation and the bulk density disparity of CNTs and SiO2 is obvious. In addition, the contradiction between removing organic additives and retaining the properties of CNTs should be considered. Some methods are provided to solve the as-mentioned difficulties.

Abstract: Stable and disperse carbon nanotubes (CNTs) aqueous solution was prepared by using cetyltrimethylammonium bromide (C16TMAB) as dispersing agent and zeta potential of CNTs solution were measured to quantitatively characterize the stability of CNTs in C16TMAB aqueous solution. The CNTs /SiO2 composites were fabricated with composite powders synthesized by rapid Sol-gel method and sintered by hot-pressing technique. The electric and dielectric properties of the composites were measured and the microstructure of CNTs and composites were investigated by Field emission scanning electron microscope (FSEM) and transmission electron microscopy (TEM). The mechanisms had been investigated to explain the effect of the CNT compositions on the electric and dielectric properties of CNTs /SiO2 composites in this paper.