Acoustic researches of liquid crystals and prospects of their application in electronic devices of automobile transport

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Larionov, A.N.^1 ; Polivaev, O.I.^1 ; Larionova, N.N.^2 ; Kuznetsov, A.N.^1 ; Gorban, L.K.^1

Voronezh State Agrarian University after Emperor Peter the Great, Michurin St. 1, Voronezh

394087, Russia^1

Voronezh State University, University Sq. 1, Voronezh

394006, Russia^2

关键词: Acoustic parameters;    Director orientation;    Dissipative coefficients;    Electronic device;    Parameters characterizing;    Physical state;    Thermodynamic parameter;    Ultra-sound velocities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/4/042060/pdf
DOI  :  10.1088/1757-899X/327/4/042060

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A method for measuring the acoustic parameters of liquid crystals and its anisotropy, parameters characterizing the dynamics of orientation processes in the nematic phase, as well as anisotropic dissipative coefficients and elastic constants with a change in pressure, temperature, and specific volume has been proposed. The dependence of the ultrasound velocity on the temperature, pressure, and parameters of the orienting magnetic field is investigated by a fixed-distance pulse method. In the framework of the hydrodynamics of the nematic phase, the dependence of the ultrasound velocity on the director orientation angle relative to the wave vector is analyzed. A nematic phase elastic modulus and anisotropy of elasticity are calculated. The relaxation character of the dependence of the nematic phase elastic modulus on the physical state thermodynamic parameters is analyzed.