کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
611241 880670 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric and electrical properties of electrorheological carbon suspensions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Dielectric and electrical properties of electrorheological carbon suspensions
چکیده انگلیسی

Measurements of electrorheological (ER) effects, dielectric properties, and electrical conductivity are made on an ER suspension composed of carbonaceous particles and silicone oil to understand the mechanism which governs the ER effect. In the frequency dependence of the dielectric permittivities, a dielectric dispersion is observed in the first-order dielectric permittivity, while in the third-order dielectric permittivity a resonance peak, which is due to shear-induced particle rotation, is recognized, showing that such dielectric properties are closely related to ER properties of the suspension. An electrical conduction mechanism, which is responsible for the ER effect, is also investigated from the dependence of dc electrical conductivity on electric-field strength and temperature.

In the spectra of third-order dielectric permittivity, a negative peak due to shear-induced particle rotation is observed.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 321, Issue 2, 15 May 2008, Pages 452–458
نویسندگان
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