Preparation of Rare Earth Doped Alumina Siloxane Gel and Its ER Effect  

作　　者：李幼荣 张明 周兰香 邱关明 井上真一 冈本宏 

机构地区：[1]Department of Chemistry and Chemical Engineering ,Institute of Science, Yangzhou University, Yangzhou 225009, China [2]Department of Materials and Chemical Engineering, Changchun College of Optics & Fine Mechanics, Changchun 130022, China [3]Department of Applied Chemistry, Aichi Institute of Technology, Toyota 470-0392, Japan

出　　处：《Journal of Rare Earths》2002年第5期483-491,共9页稀土学报（英文版）

基　　金：ProjectsupportedbyInternationalCooperationFoundationofYangzhouUniversity (D 9913 46 7)

摘　　要：Poly(methyl methacrylate) (PMMA) was used to wrap alumina siloxane sol through emulsion polymerization. A kind of suspensions with notable ER effect was produced by fully mixing the prepared microcapsule with silicon oil. Meanwhile a series of PMMA wrapped alumina-siloxane gel doped with rare earths was obtained and its ER effect was tested, like viscosity of different rare earth ion doped samples in different powder concentrations and at different temperatures, at the same time, leak current density and dielectric constant were measured. Results show that the ER effect of this suspension is remarkable, and its stability is much better. The condition of emulsion polymerization and the mechanism of effect are discussed.Poly(methyl methacrylate) (PMMA) was used to wrap alumina siloxane sol through emulsion polymerization. A kind of suspensions with notable ER effect was produced by fully mixing the prepared microcapsule with silicon oil. Meanwhile a series of PMMA wrapped alumina-siloxane gel doped with rare earths was obtained and its ER effect was tested, like viscosity of different rare earth ion doped samples in different powder concentrations and at different temperatures, at the same time, leak current density and dielectric constant were measured. Results show that the ER effect of this suspension is remarkable, and its stability is much better. The condition of emulsion polymerization and the mechanism of effect are discussed.

关 键 词：rare earths ER effect alumina  siloxane gel VISCOSITY electric field strength emulsion polymerization 

分 类 号：O614[理学—无机化学]