摘要
理论计算表明 ,介质包覆导体颗粒用作电流变液的分散相 ,可以获得高剪切应力的电流变液 .采用溶胶 -凝胶技术在尺度为 5— 10 μm的石墨颗粒表面成功地包覆了TiO2 ,获得了金红石相TiO2 包覆石墨的复合颗粒 .配制成复合颗粒 /硅油电流变液 ,其剪切应力与纯TiO2 /硅油电流变液相比 ,可提高一个数量级 .当电场强度为 1 7kV/mm时 ,复合颗粒 /硅油电流变液的剪切应力可达 1 2 5kPa ,电流密度小于 10 μA/cm2 .
Theoretical calculation shows that electrorheological fluids with dielectric coating conductive particles as a dispersed phase will give high shear stress. We has coated graphite particles with TiO 2 using sol\|gel technique. Rutile phase TiO 2 coating graphite composite particles have been got. The shear stress of composite particles/silicone oil electrorheological fluid is one order higher than that of the TiO 2/silicone oil. When the electric field strength is 1 7?kV/mm, the shear stress of composite particles/silicone oil electrorheological fluid reaches 1 25?kPa, and electric current density is less than 10?μA/cm 2.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第11期2176-2179,共4页
Acta Physica Sinica
基金
国家自然科学基金!(批准号 :1983 4 0 2 0 )资助的课题&&
关键词
电流变液
包覆
石墨
二氧化钛
硅油
electrorheological fluid, coat, TiO 2, graphite
