Preparation of rare earth doped alumina-siloxane gel and its ER effect
writer：Li, YR，Zhang, M，Zhou, LX，Qiu, GM，Shinich, I，Hiroshi, O
keywords：氧化鋁-硅氧烷，溶膠-凝膠，ER效應(yīng)，甲基丙烯酸鹽，PMMA 粘度，乳液聚合，稀土，制備，摻雜
source：期刊
specific source：Journal of Rare Earths
Issue time：2002年
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.