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Internal structure and ER properties in ER suspensions of disperse system under dc electric field
Author(s) -
Hanaoka Ryoichi,
Hotta Koji,
Anzai Hidenobu,
Sakurai Koji,
Kuroda Shinichi
Publication year - 2000
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/1520-6416(200009)132:4<9::aid-eej2>3.0.co;2-z
Subject(s) - electric field , rheology , materials science , ionic bonding , polarization (electrochemistry) , electrorheological fluid , ion , electrode , metal , voltage , chemical engineering , chemical physics , composite material , chemistry , metallurgy , electrical engineering , physics , organic chemistry , quantum mechanics , engineering
The interrelationship between the internal structure and the rheological properties in electrorheological (ER) suspensions subjected to a dc applied field was investigated using two ER suspensions [herein termed ERF(I) and ERF(II)]. There was a remarkable difference in the internal structure between ERF(I) and ERF(II), and the ER response in ERF(II) which contained the negative fluorine ions was larger than that in ERF(I) lacking these ions. These are related to an ionic interfacial activity of dispersed particles involving the polarization of a diffuse double sheath. The effects of the voltage polarity and the gap spacing on the rheological properties in two ER suspensions were also examined. Differences in the test results were attributed to the internal structure in the suspensions. It was also shown that further promotion of the ER response in ERF(II) is obtained by installation of a metallic mesh on the electrode surface. © 2000 Scripta Technica, Electr Eng Jpn, 132(4): 9–18, 2000