Mass Transport and DC Electromotive Force Induced in Ionic Crystals by High-Frequency Electric Field

1994 ◽  
Vol 369 ◽  
Author(s):  
K. I. Rybakov ◽  
V. E. Semenov
Keyword(s):  
Electric Field ◽  
Mass Transport ◽  
Electric Fields ◽  
High Frequency ◽  
Theoretical Study ◽  
Moderate Intensity ◽  
Ionic Crystals ◽  
Crystalline Materials ◽  
High Frequency Electric Field ◽  
Electromagnetic Pressure

AbstractResults of the theoretical study of the effects produced on ionic crystals by highfrequency electric fields of moderate intensity are presented. The ponderomotive action of the electric field on the space charge induced by it in a thin layer within the crystal near its surface causes directional mass transport that leads to plastic deformation and induces a stationary distribution of electric potential. The analysis shows that the proposed effect (that appears to be equivalent to the action of mechanical stresses which exceed the electromagnetic pressure by many orders of magnitude) can influence the results of processing of ionic crystalline materials significantly.

Possibility of Microwave-Controlled Surface Modification

1996 ◽  
Vol 430 ◽  
Author(s):  
K. I. Rybakov ◽  
V. E. Semenov
Keyword(s):  
Surface Modification ◽  
Electric Field ◽  
Mass Transport ◽  
Electric Fields ◽  
High Frequency ◽  
Theoretical Study ◽  
Surface Effects ◽  
Moderate Intensity ◽  
Crystalline Solids ◽  
Periodic Profile

AbstractResults of the theoretical study of surface effects in ionic crystalline solids under the action of high-frequency electric fields of moderate intensity are presented. The averaged ponderomotive action of the electric field on the charged vacancies within the crystal causes directional mass transport that leads to development of a surface instability. The analysis shows that the proposed effect can result in the formation of a periodic profile on the surface.

Some Applications of High-Frequency Electric Currents to the Latex Industry

1938 ◽  
Vol 11 (3) ◽  
pp. 570-574
Author(s):  
Henri Leduc
Keyword(s):  
Dielectric Loss ◽  
Electric Field ◽  
Electric Fields ◽  
High Frequency ◽  
Specific Effect ◽  
Entire Body ◽  
Rubber Latex ◽  
Joule Effect ◽  
High Frequency Electric Field ◽  
Rubber Particles

Abstract The “radiocoagulation” of latex has been developed in the laboratories of L'Office National des Recherches et Inventions by Dufour and Leduc, who conceived the idea of applying the effect of electric fields of high frequency to rubber latex. When latex is exposed to the action of an electric field of high frequency, the entire body of liquid is heated uniformly, provided that the electric field itself is uniform. The causes of this heating effect are difficult to ascertain because various phenomena are involved simultaneously, e. g., a dielectric loss in the rubber and a loss by the Joule effect in the serum. Each of these effects is, according to conditions, the predominant one, e. g., by increasing the conductivity of the serum, electrolytes such as sodium sulfate or ammonium sulfate increase the Joule loss, U2/R, whereas an increase in the concentration of latex tends to increase the dielectric loss. Finally, since rubber particles are not electrically neutral, they are subject to alternating forces of the electric field, which is a specific effect of the high frequency, and these forces impart to the rubber particles movements throughout the liquid. Now latex can be rendered sensitive to mechanical forces, i. e., some mixtures can be coagulated by slight agitation. Accordingly it is conceivable that a high-frequency electric field, by setting the rubber particles in motion throughout the emulsion, is capable of coagulating a mass of latex exposed to the field.

scholarly journals An Analogy Between the Effects of Fluctuating Electric Fields and Steady Magnetic Fields in Isotropic Conductors when a Universal Relaxation Time Cannot Be Defined

1960 ◽  
Vol 13 (1) ◽  
pp. 95
Author(s):  
EJ Moore
Keyword(s):  
Magnetic Field ◽  
Relaxation Time ◽  
Electric Field ◽  
Electric Fields ◽  
High Frequency ◽  
Present Note ◽  
Isotropic Solid ◽  
High Frequency Electric Field ◽  
Circular Frequency ◽  
Steady Magnetic Field

It is well known that when a " universal" time of relaxation ("t') exists, the influence of a harmonically varying electric field (F cceiOlt) on the transport properties of a solid may be taken into account by replacing "t' by "t'/(l +iCil"t'). Dingle (1956a) demonstrated that, for an isotropic solid, the effect of a steady magnetic field may similarly be obtained by replacing "t' by "t'/(l+j~l"t') with an applied d;c. electric field, and by "t'/[l+(iCil+jO)"t'] with an a.c. field. (Here j2= -1, ij -=1= -1, and 0=( -e)H/mc is the circular frequency of precession of an electron.) The object of the present note is to show that this analogy between a high frequency electric field and a steady magnetic field still exists, even when a " universal" relaxation time cannot be defined.

scholarly journals RESEARCH OF INFLUENCE OF HIGH-FREQUENCY ELECTRICAL FIELD ON SOWING QUALITY OF CEREAL SEEDS

2019 ◽  
pp. 95-99
Author(s):  
Ivan Solovey
Keyword(s):  
Electric Field ◽  
Winter Wheat ◽  
Electric Fields ◽  
High Voltage ◽  
High Frequency ◽  
Experimental Studies ◽  
Voltage Source ◽  
Seed Systems ◽  
High Frequency Electric Field ◽  
Frequency Electric Field

A study on the effect of high-frequency electric field on cereal seeds to increase seed germination and plant growth is presented. The study was conducted in the treatment of winter wheat seeds. High-voltage electric fields are one of the promising means of influencing crop seeds. One of the areas of use of high frequency high voltage electric fields is pre-sowing seed treatment, storage and processing. Experimental studies were conducted in the laboratory on a specially designed installation using a high-frequency high-voltage source. Processing doses have been established which make it practical to use a high-frequency, high-voltage electric field in electrotechnical winter wheat seed systems. Positive influence of high-frequency electric field on increase of sowing qualities and yielding properties of seeds is established. The optimal mode for determining the winter wheat field is the micro field, the mode is 16.8 kJ per 1 kg energy, the hour is 4 seconds, and the laboratory laboratory is 20% similar.

scholarly journals Comparative analysis the performance of electrochemical water softening between high frequency electric fields and direct current electric fields based on orthogonal experimental methods

2021 ◽  
Vol 83 (7) ◽  
pp. 1677-1690
Author(s):  
Wei Lin ◽  
Zhonghao Wang ◽  
Wei Wang ◽  
Qi Chen ◽  
Jianmin Xu ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Direct Current ◽  
High Frequency ◽  
Feed Concentration ◽  
Water Softening ◽  
Direct Current Electric Field ◽  
High Frequency Electric Field ◽  
Hardness Removal ◽  
Current Electric Field

Abstract Electrochemical water softening has been widely used in industrial circulating cooling water systems; however, their low deposition efficiency is the main drawback that limits usage in medium to large enterprises. In this work, the effect of different parameters on the hardness removal efficiency and energy consumption of the electrochemical water softening system is experimentally studied, and the performance of water softening applied by high frequency electric fields and direct current electric fields are comparative analyzed. The impact factors of the electrochemical water softening system are as follows: initial feed concentration of solute, magnitude of voltage, inter-electrode distance, area of cathode and frequency of power supply. To improve the analysis efficiency, the L25 (55) orthogonal table is used to investigate the five different factors at five levels. The experimental results are shown that the initial feed concentration of solute is the most significant factor affecting the hardness removal efficiency. The optimal combination for water softening in the group applied by high frequency electric field and direct current electric field are A3B2C1D4E3 and A2B5C3D1 respectively. The energy utilization of the device applied by high frequency electric field is 3.2 times that applied by direct current electric field. The practice shows that direct current electric fields have a better softening effect, and are is more suitable for scaling ion removal. Particle image velocimetry (PIV) was used to observe the flow field induced by the electrolysis and found that the vertical and horizontal velocities of the flow field at low voltage are conducive to the migration of scaled ions to the cathode, and then the electrolytic reaction and deposition reaction synergy effect is the optimal.

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