| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 596766 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2008 | 7 Pages |
The dielectric properties of 4A zeolites dispersed in silicone oil are measured in the frequency range of 40 Hz to 110 MHz for elucidating the dielectric background of zeolites electrorheological (ER) fluid, and two relaxations are observed. The possible mechanisms of the dielectric relaxations are suggested that the transfer motion of sodium ions in supercage is contributed to the low-frequency relaxation, and the high-frequency relaxation is raised from the hopping of sodium ions restricted on active sites. The dielectric analyzing indicates that appropriate concentration, presence of water in cavity and the frequency strongly affect the motion of sodium ion inside the solid-state framework. As well as the analysis of the phase parameters offers real permittivity of zeolite particle under electric field, and insures the accurate calculation for electrostatic interaction of dipole.
