Preparation of Rare Earth Doped Alumina-Siloxane Gel and Its ER Effect
来源期刊：JOURNAL OF RARE EARTHS2002年第5期
论文作者：井上真一 李幼荣 周兰香 冈本宏 邱关明 张明
Key words：rare earths; ER effect; alumina-siloxane gel; viscosity; electric field strength; emulsion polymerization;
Abstract: 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.
井上真一1，李幼荣2，周兰香2，冈本宏1，邱关明3，张明2
(1.Department of Applied Chemistry, Aichi Institute of Technology, Toyota 470-0392, Japan;
2.Department of Chemistry and Chemical Engineering ,Institute of Science, Yangzhou University, Yangzhou 225009, China;
3.Department of Materials and Chemical Engineering, Changchun College of Optics & Fine Mechanics, Changchun 130022, China)
Abstract: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.
Key words:rare earths; ER effect; alumina-siloxane gel; viscosity; electric field strength; emulsion polymerization;
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