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Energies 2012, 5(8), 2943-2951; doi:10.3390/en5082943

Preparation and Electrical Properties of Insulation Paper Composed of SiO2 Hollow Spheres

1
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
2
College of Engineering and Technology, Southwest University, Chongqing 400700, China
*
Author to whom correspondence should be addressed.
Received: 17 February 2012 / Revised: 2 July 2012 / Accepted: 16 July 2012 / Published: 9 August 2012
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Abstract

SiO2 hollow spheres and low relative permittivity insulation paper handsheets composed of these SiO2 hollow spheres with different weight percentages were successfully prepared. Low-content SiO2 hollow spheres were uniformly dispersed in the insulation paper handsheets. The relative permittivity of the immersed oil Kraft-SiO2 hollow sphere handsheets (K-SiO2) initially decreased and then increased with increased amount of SiO2 hollow spheres. K-5% SiO2 possessed the lowest relative permittivity of approximately 1.68 at 50 Hz. The breakdown voltage of the paper-oil-paper composite insulation system increased from 26.4 kV to 30.5 kV with decreased relative permittivity of the paper from 2.55 to 1.68. The relationship between the relative permittivity and electric field strength of typical samples were also calculated.
Keywords: SiO2 hollow spheres; relative permittivity; electrical properties; breakdown voltage SiO2 hollow spheres; relative permittivity; electrical properties; breakdown voltage
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Liao, R.; Zhang, F.; Yuan, Y.; Yang, L.; Liu, T.; Tang, C. Preparation and Electrical Properties of Insulation Paper Composed of SiO2 Hollow Spheres. Energies 2012, 5, 2943-2951.

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