The Effect of the SiC Content on Electrical Properties of SiC Anti-Corona Coating for Generator

2016 ◽  
Vol 868 ◽  
pp. 23-27
Author(s):  
Liang Liang Nie ◽  
Hang Zhou ◽  
Shi Di Tao ◽  
Yu Feng Li ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Surface Resistivity ◽  
Initial Surface ◽  
Mass Ratio ◽  
Linear Coefficient ◽  
Non Linear ◽  
Suitable Amount ◽  
Corona Structure

In this research, the anti-corona lacquer with different SiC content was fabricated. The surface resistivity of the lacquer at different voltage levels was measured, and the effect of the SiC content on electrical properties of SiC anti-corona coating was investigated. The results showed that the initial surface resistivity ρs decreased with increasing mass ratio of SiC to resin, while the non-linear coefficient β varied the opposite way. The surface resistivity was improved by adding suitable amount of graphite, which suited the requirements of multiple sections anti-corona structure.

Investigation of Low Voltage Varistor Using TiO2 as Base Material and SiO2, Bi2O3 and WO3 as Dopants

2015 ◽  
Vol 1115 ◽  
pp. 156-159
Author(s):  
Shahida Begum ◽  
Zarrin Kothadapani ◽  
Mokanaraju K. Selvaraj ◽  
Mohamed Muntasir
Keyword(s):  
Electrical Properties ◽  
Breakdown Voltage ◽  
Power Loss ◽  
Mechanical Characterization ◽  
Low Voltage ◽  
Base Material ◽  
The Other ◽  
Linear Coefficient ◽  
Radial Shrinkage ◽  
Non Linear

Varistor with TiO2 as the base and SiO2, WO3 and Bi2O3 as dopants were investigated to create a low voltage varistor. The physical, mechanical, microstructural and electrical properties were studied where the concentration of SiO2 was varied but the concentration of WO3 and Bi2O3 was fixed. Physical and mechanical characterization consisted of green and fired density, axial and radial shrinkage and Vickers Hardness. Electrical evaluation on the other hand consisted of non-linear coefficient, breakdown voltage, power loss and clamping ratio. Non-linear coefficient of 2.16, very low breakdown voltage of 5.538V/cm and minimal power loss of 0.0124mW was achieved. It was found that optimum results were achieved with 98.3% TiO2, 0.7% SiO2, 0.5%Bi2O3 and 0.5%WO3.

Synthesis of Pr6O11 Doped ZnO-Based Varistors by Pyrogenic Decomposition of Nitrate

2011 ◽  
Vol 675-677 ◽  
pp. 179-182
Author(s):  
Jian Feng Zhu ◽  
Guo Quan Qi ◽  
Hai Bo Mao ◽  
Hai Bo Yang ◽  
Fen Wang
Keyword(s):  
Grain Size ◽  
Electrical Properties ◽  
Leakage Current ◽  
Sintering Temperature ◽  
Linear Coefficient ◽  
Average Grain Size ◽  
Non Linear ◽  
Different Temperatures ◽  
Zno Powders ◽  
Doped Zno

Pr6O11 doped ZnO-based varistor powders were prepared by a method of pyrogenic decomposition nitrate, which were together with ZnO powders, made into rounded mass and sintered at different temperatures. The effects of sintering temperatures on the composition, microstructure and electrical properties of Pr6O11 doped ZnO-based varistors were investigated. The results show that the optimum sintering temperature is at 1150 °C with 6 μm ZnO average grain size and the samples possess the advantageous electrical properties: varistor voltage of about 480 V/mm, non linear coefficient reaching 44 and leakage current of 0.7 μA.

scholarly journals Information can be stored in the human skin memristor which has non-volatile memory

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Oliver Pabst ◽  
Ørjan G. Martinsen ◽  
Leon Chua
Keyword(s):  
Electrical Properties ◽  
Human Skin ◽  
Biological Tissues ◽  
Electrical Stimulus ◽  
Information Storage ◽  
Surrounding Tissue ◽  
Electrical Measurements ◽  
Non Linear ◽  
Non Volatile Memory ◽  
Volatile Memory

AbstractMuch is already understood about the anatomical and physiological mechanisms behind the linear, electrical properties of biological tissues. Studying the non-linear electrical properties, however, opens up for the influence from other processes that are driven by the electric field or movement of charges. An electrical measurement that is affected by the applied electrical stimulus is non-linear and reveals the non-linear electrical properties of the underlying (biological) tissue; if it is done with an alternating current (AC) stimulus, the corresponding voltage current plot may exhibit a pinched hysteresis loop which is the fingerprint of a memristor. It has been shown that human skin and other biological tissues are memristors. Here we performed non-linear electrical measurements on human skin with applied direct current (DC) voltage pulses. By doing so, we found that human skin exhibits non-volatile memory and that analogue information can actually be stored inside the skin at least for three minutes. As demonstrated before, human skin actually contains two different memristor types, one that originates from the sweat ducts and one that is based on thermal changes of the surrounding tissue, the stratum corneum; and information storage is possible in both. Finally, assuming that different physiological conditions of the skin can explain the variations in current responses that we observed among the subjects, it follows that non-linear recordings with DC pulses may find use in sensor applications.

Study on Shock Response of 2-DOF Nonlinear Cushion Packaging System with Strong Hysteresis

2011 ◽  
Vol 101-102 ◽  
pp. 1181-1185
Author(s):  
Zai He Yu ◽  
Jian Wei Zhou
Keyword(s):  
Fourth Order ◽  
Design Parameter ◽  
Response Spectra ◽  
Stiffness Ratio ◽  
Mass Ratio ◽  
Packaging System ◽  
Shock Response ◽  
Non Linear ◽  
Dimensionless Variables ◽  
Trapezoidal Pulse

This paper first establishes the model for a 2-DOF non-linear cushion packaging system with strong hysteresis and then derives its vibration equations. The vibration equations are transformed into ones using dimensionless variables and parameters. The influence of mass ratio and stiffness ratio on the system under excitation of trapezoidal pulse shock has been analyzed based on the response spectra obtained by applying the fourth order Runge-Kuntta method to the transformed equations. Results show that the mass ratio is the key design parameter.

Wavelength dependence of the third order non-linear coefficient in hydrothermally grown ZnO crystals

2004 ◽  
Vol 1 (4) ◽  
pp. 997-1000 ◽  
Author(s):  
A. Zappettini ◽  
F. D'Amore ◽  
S. M. Pietralunga ◽  
A. Terio ◽  
M. Martinelli ◽  
...  
Keyword(s):  
Wavelength Dependence ◽  
Third Order ◽  
Linear Coefficient ◽  
The Third ◽  
Non Linear

A modified non-linear model for high mass ratio square cylinder

2014 ◽  
Vol 28 (12) ◽  
pp. 4989-4996 ◽  
Author(s):  
Nadeem A. Sheikh ◽  
S. Manzoor ◽  
S. Khushnood
Keyword(s):  
Linear Model ◽  
High Mass ◽  
Mass Ratio ◽  
Square Cylinder ◽  
Non Linear

Electrical and Structural Analysis of ATO/PP Nanocomposites

2010 ◽  
Vol 26-28 ◽  
pp. 123-126
Author(s):  
Wei Pan ◽  
Xiao Wei He ◽  
Yan Chen
Keyword(s):  
Structural Analysis ◽  
Electrical Property ◽  
Electrical Properties ◽  
Solution Method ◽  
High Energy ◽  
Surface Resistivity ◽  
Melt Mixing ◽  
Resistivity Measurements ◽  
Phase Structures ◽  
Mixing Method

The ATO/PP nanocomposites were prepared by solution-mixing method assisted by high-energy sonication and melt-mixing method. Electrical properties of the nanocomposites were characterized by means of surface resistivity measurements and the phase structures were investigated via SEM. The crystallization characteristics of pure PP and ATO/PP nanocomposites were investigated by WAXD and POM. Comparing with the two methods, solution method will make ATO well dispersed in the PP matrix and the obtained materials will have better electrical property. The ATO enhanced the nucleation of polypropylene crystallization and made the crystal smaller and even.

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