采用溶胶-凝胶结合水热法制备了钐掺杂二氧化钛(Sm-TiO2)纳米固体颗粒,并通过XRD,TEM等对Sm-TiO2进行了表征.结果表明,Sm3+的掺入保留了TiO2原有的锐钛矿晶型且没有其他新的晶型结构出现,其颗粒大小约为8～13 nm.将Sm-TiO2均匀分散在甲基硅油中形成纳米电流变液(n-ERF),并通过旋转流变仪测试了该n-ERF的动态电流变响应.结果发现,通过氯仿作为媒介而形成的n-ERF的具有优异的抗沉降稳定性;n-ERF具有显著的动态电流变响应,随着电场强度的增大,n-ERF的动态模量随之增加,且其线性平台区也随之变长,表现出典型的类固态响应行为,极化效应解释了产生这种现象的原因所在;当Sm3+掺杂浓度为0.05时,n-ERF表现出最优异的动态电流变性能.
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