Electrorheological properties of diatomite/silicone oil suspensions under DC fields
Chinese Journal of Polymer Science (English Edition), cilt.24, sa.5, ss.463-471, 2006 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 24 Sayı: 5
- Basım Tarihi: 2006
- Doi Numarası: 10.1142/s0256767906001539
- Dergi Adı: Chinese Journal of Polymer Science (English Edition)
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.463-471
- Anahtar Kelimeler: Diatomite/silicone oil suspensions, Electrorheological fluids, Shear stress
- Ankara Hacı Bayram Veli Üniversitesi Adresli: Hayır
Özet
In this study, electrorheological (ER) behavior of suspensions prepared from 3.0 and 9.0 μm diatomite particulate, dispersed in insulating silicone oil (SO) medium was investigated. Sedimentation stabilities of suspensions (c = 5 wt%) prepared using these diatomite powders were determined to be 32 days (d = 3 μm) and 24 days (d = 9 μm), respectively. ER activity of all the suspensions was observed to increase with increasing electric field strength, concentration and decreasing shear rate. Shear stress of diatomite suspensions increased linearly with increasing concentrations of the particles and with the applied electric field strength. Electric field viscosity of all the suspensions decreased sharply with increasing shear rate and particle size, showing a typical shear thinning non-Newtonian visco-elastic behavior. Effects of high temperature and polar promoter onto ER activity of diatomite/SO system were also investigated. © 2006 World Scientific.