Preparation and Electrorheological Performance of SiO2 Particle Materials Adsorbed with YF3, Y2(CO3)3, Y2(C2O4)3 or YPO4

稀土学报(英文版), 2002, 20(6): 666-669.

许明远 ^1, , 马淑珍 ^2, , 李淑新 ^3, , 李俊然 ^4, , 张邵华 ^5, , 高松 ^6,

1.State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, China

2.Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China

3.Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China

4.State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, China

5.School of Vehicle and Transmission Engineering, Beijing Institute of Technology, Beijing 100081, China

6.State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, China

基金项目: 国家重点基础研究发展计划(973计划)(G1998061305) 教育部优秀青年教师资助计划国家自然科学基金(20023005,29831010)

Preparation and Electrorheological Performance of SiO2 Particle Materials Adsorbed with YF3, Y2(CO3)3, Y2(C2O4)3 or YPO4

Keywords： rare earths

The SiO2 adsorbing YF3, Y2(CO3)3, Y2(C2O4)3 and YPO4, respectively, formed four systems of particle materials: SiO2*YF3, SiO2*Y2(CO3)3 , SiO2*Y2(C2O4)3 and SiO2*YPO4. The electrorheological(ER) behavior of the electrorheological fluids (ERF) prepared by dispersing them in silicone oil was tested at 20 ℃ under d.c. field. The results show that the system of SiO2*YF3 does not display ER activity, and the ER performance of the particle materials of SiO2*Y2(CO3)3 is the best among them. The shearing stress of ERF with SiO2*Y2(CO3)3 particles is 1.644 KPa and the relative viscosity ηr(=ηE/η0) is 20.3 (under field strength E=4200 V*mm-1) while the adsorbed content of Y2(CO3)3 in the SiO2 particle materials is 12.4%(mass fraction).

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Preparation and Electrorheological Performance of SiO2 Particle Materials Adsorbed with YF3, Y2(CO3)3, Y2(C2O4)3 or YPO4

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