Title :
Electrorheology in liquids and liquid crystals studied by ultrasonic wave
Author :
Yoshino, K. ; Inoue, M. ; Moritake, H. ; Toda, K.
Author_Institution :
Dept.of Electron. Eng., Osaka Univ., Japan
Abstract :
The electrorheology (ER) effect in liquids and liquid crystals are investigated by ultrasonic wave propagation. The acoustic phase-delay change, which is related to the ultrasonic wave velocity, is related to the viscosity of liquids and liquid crystals. The applied voltage dependence of acoustic phase-delay change in nematic liquid crystal, the ferroelectric liquid crystal and silicone oil are measured. The ER effect in liquid and liquid crystals are discussed in the viewpoint of liquid-crystal director orientation.
Keywords :
electric field effects; electrorheology; ferroelectric liquid crystals; insulating oils; molecular orientation; nematic liquid crystals; silicones; ultrasonic propagation; ultrasonic velocity; viscosity; ER effect; acoustic phase-delay change; applied voltage dependence; electrorheology; ferroelectric liquid crystal; liquid crystals; liquid-crystal director orientation; liquids; nematic liquid crystal; silicone oil; ultrasonic wave propagation; ultrasonic wave velocity; viscosity; Acoustic measurements; Acoustic propagation; Acoustic waves; Erbium; Ferroelectric materials; Liquid crystals; Petroleum; Phase measurement; Viscosity; Voltage;
Conference_Titel :
Dielectric Liquids, 2002. ICDL 2002. Proceedings of 2002 IEEE 14th International Conference on
Print_ISBN :
0-7803-7350-2
DOI :
10.1109/ICDL.2002.1022774
