ER effect of PMMA wrapped alumina-siloxane gel doped with rare earths
writer：Qiu, GM，Zhou, LX，Zhang, M，Li, YR，Yan, CH
keywords：rare earths；water gIass；PMMA wrapped aIumina-siIoxane geI；suspensions；eIectrorheoIogicaI effect
source：期刊
specific source：Journal of Rare Earths
Issue time：2002年
PMMA wrapped aIumina-siIoxane geI was obtained by using poly（methylmethacrylate）（PMMA）to
wrap alumina-siloxane sol which was made from water glass，aluminum nitrate and-methacryIic acid . MeanwhiIe，
rare earth ions were used to dope in the course of reaction，and stable suspensions was produced by putting PMMA
wrapped microcapsuIe powder doped with rare earths into methy-silicon oil. It is found that its eIectrorheoIogical
（ER）effect improves strikingIy after Ioading eIectric fieId . At a certain concentration，the immediate viscosity increases
from 95 to 178 Pa·s compared to the system without doping .