Multishot echo-planar MREIT for fast imaging of conductivity, current density, and electric field distributions

Ceramic outdoor insulators play an important role in electrical insulation and mechanical support because of good chemical and thermal stability, which have been widely used in power systems. However, the brittleness and surface discharge of ceramic material greatly limit the application of ceramic insulators. From the perspective of sintering technology, flash sintering technology is used to improve the performance of ceramic insulators. In this paper, the simulation model of producing the ceramic insulator by the flash sintering technology was set up. Material Studio was used to study the influence of electric field intensity and temperature on the alumina unit cell. COMSOL was used to study the influence of electric field intensity and current density on sintering speed, density and grain size. Obtained results showed that under high temperature and high voltage, the volume of the unit cell becomes smaller and the atoms are arranged more closely. The increase of current density can result in higher ceramic density and larger grain size. With the electric field intensity increasing, incubation time shows a decreasing tendency and energy consumption is reduced. Ceramic insulators with a higher uniform structure and a smaller grain size can show better dielectric performance and higher flashover voltage.

Electric Field Distributions of NMHA Inside and Outside of a Human Body Phantom

2020 IEEE International RF and Microwave Conference (RFM) ◽

10.1109/rfm50841.2020.9344777 ◽

2020 ◽

Author(s):

Nur Amalina Kamaruddin ◽

Kamilia Kamardin ◽

Yoshihide Yamada

Keyword(s):

Electric Field ◽

Human Body ◽

Field Distributions

Orienting anisometric pores in ferroelectrics: Piezoelectric property engineering through local electric field distributions

Physical Review Materials ◽

10.1103/physrevmaterials.3.084408 ◽

2019 ◽

Vol 3 (8) ◽

Cited By ~ 1

Author(s):

J. Schultheiß ◽

J. I. Roscow ◽

J. Koruza

Keyword(s):

Electric Field ◽

Piezoelectric Property ◽

Local Electric Field ◽

Field Distributions

Negligible oxygen vacancies, low critical current density, electric-field modulation, in-plane anisotropic and high-field transport of a superconducting Nd0.8Sr0.2NiO2/SrTiO3 heterostructure

Rare Metals ◽

10.1007/s12598-021-01768-3 ◽

2021 ◽

Author(s):

Xiao-Rong Zhou ◽

Ze-Xin Feng ◽

Pei-Xin Qin ◽

Han Yan ◽

Xiao-Ning Wang ◽

...

Keyword(s):

Critical Current Density ◽

Electric Field ◽

Critical Current ◽

Current Density ◽

High Field ◽

Oxygen Vacancies ◽

Field Modulation

Analysis of Electric Field and Current Density for Different Electrode Configuration of XLPE Insulation

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.36.29092 ◽

2018 ◽

Vol 7 (3.36) ◽

pp. 127 ◽

Cited By ~ 1

Author(s):

Nishanthi Sunthrasakaran ◽

Nor Akmal Mohd Jamail ◽

Qamarul Ezani Kamarudin ◽

Sujeetha Gunabalan

Keyword(s):

Electric Field ◽

Power System ◽

Field Distribution ◽

High Voltage ◽

Current Density ◽

Electric Field Distribution ◽

Electrical Power ◽

High Electric Field ◽

Electrode Configuration ◽

Maximum Electric Field

The most important aspect influencing the circumstance and characteristics of electrical discharges is the distribution of electric field in the gap of electrodes. The study of discharge performance requires details on the variation of maximum electric field around the electrode. In electrical power system, the insulation of high voltage power system usually subjected with high electric field. The high electric field causes the degradation performance of insulation and electrical breakdown start to occur. Generally, the standard sphere gaps widely used for protective device in electrical power equipment. This project is study about the electric field distribution and current density for different electrode configuration with XLPE barrier. Hence, the different electrode configuration influences the electric field distribution. This project mainly involves the simulation in order to evaluate the maximum electric field for different electrode configuration. Finite Element Method (FEM) software has been used in this project to perform the simulation. This project also discusses the breakdown characteristics of the XLPE. The accurate evaluation of electric field distribution and maximum electric field is an essential for the determination of discharge behavior of high voltage apparatus and components. The degree of uniformity is very low for pointed rod-plane when compared to other two electrode configurations. The non- uniform electric distribution creates electrical stress within the surface of dielectric barrier. As a conclusion, when the gap distance between the electrodes increase the electric field decrease.