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The SiO_2 particle material has weak electrorheological (ER) activity. The ER performance of the SiO_2 particles can be ameliorated after adsorbing Y_2(CO_3)_3. In this paper, the effect of Y_2(CO_3)_3 and different surfactants on the ER performance of the SiO_2 particle materials is investigated. The results show that anionic or cationic surfactants maybe enhance the ER activity of SiO_2 material, and nonionic surfactants cannot when surfactants are added during the process of the SiO_2 particle preparation, only the anionic surfactant, AES, can enhance markedly the ER performance of the material. The surface area, pore volume and pore diameter of the particles were measured. The effect of Y_2(CO_3)_3 and the surfactants on the microstructure of SiO_2 materials and the relationship between ER effect and the microstructure are described.
The ER performance of the SiO 2 particles can be ameliorated after adsorbing Y_2 (CO_3) _3. In this paper, the effect of Y_2 (CO_3) _3 and different surfactants on the ER performance of the results show that anionic or cationic surfactants may enhance the ER activity of SiO 2 material, and nonionic surfactants can not when surfactants are added during the process of the SiO 2 particle preparation, only the anionic surfactant, AES, can enhance The effect of Y_2 (CO_3) _3 and the surfactants on the microstructure of SiO_2 materials and the relationship between ER effect and the microstructure are marked described.