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This paper describes the dielectric material and the structure of standard capacitors developed by NIM, with capacitance range of 1pF to 1µF and the accuracy of 5ppm to 50ppm at 1 kHz. High stability and high accuracy of standard capacitors mainly derives from a choice of dielectric materials which are fused-silica and nano-ceramic. And the capacitors are placed into a constant temperature control...
Ozone is one of the byproducts when there is corona occurred in the air. In order to study the influence of corona on the aging of HTC silicone rubber, the TSC performance of HTV silicone rubber under ozone environment has been investigated in this paper. This paper mainly reported the influence of the different ozone aging time. The relationship between the TSC performance and the ozone aging time...
In this paper, the influence of corona intensity on the TSC characteristics of HTV silicone rubber was investigated. Five levels of corona voltage were employed to deteriorate the samples respectively. The TSC was measured for the samples exposure different deteriorating duration. Experimental results show that the variation trend of TSC curves with the corona intensity is not identical at different...
Electrically polarized ceramics are classified as electrets, when ions are displaced or dipole moments are aligned in a direction for a considerable period due to an external electric force. An electret can independent irradiate an electrostatic force to the surrounding constituents. As briefly mentioned above, polarization takes place due to the off-centered displacement of cations and anions in...
In this paper, the processes associated with the electrodeposition of Selenium on Au substrates from nitric acidic solutions were investigated by combined electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) measurements. The analyses reveal that H2SeO3 in the solution is firstly adsorbed on the surface of Au electrode during cathodic polarization and subsequently reduced to Se...
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