Dielectric properties of fullerene-doped insulation liquids

The work presents the concept of C 60 fullerene nanomodification of mineral insulation oil. For the research, 20 probes of oil were prepared; one pure and 19 containing different content of C 60 - from 1 mg/1 to 512 mg/1. The probes were examined mainly against their tendency to electrification. To...

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Bibliographic Details
Main Authors: Aksamit, P., Zmarzy, D.
Format: Conference Proceeding
Language:English
Subjects:
Dielectric liquids
Dielectric loss measurement
Dielectric losses
Dielectric measurements
Dielectrics and electrical insulation
Minerals
Oil insulation
Permittivity measurement
Petroleum
Probes
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Summary:The work presents the concept of C 60 fullerene nanomodification of mineral insulation oil. For the research, 20 probes of oil were prepared; one pure and 19 containing different content of C 60 - from 1 mg/1 to 512 mg/1. The probes were examined mainly against their tendency to electrification. To control if fullerene modifications do not deteriorate other parameters, the electrical endurance, permittivity, dielectric loss tangent and resistivity were also measured. The electrification current was measured using rotating electrometer spinning disk system developed in the institute where authors of the paper work. The current was measured for rotational speeds from 0 rpm to 400 rpm. The research revealed the C 60 ability to significantly reduce the constant component of streaming electrification current. It is possible to determine the C 60 concentration optimal for the whole rotational velocities range analyzed. For maximal electrification current reduction one may also optimize the C 60 content for a specific flow velocity, as the concentration giving the minimal current value depends on velocity. By doping with C 60 fullerene, dielectric loss tangent reduction by more than 30% is possible for the similar range of C 60 concentrations that give the optimal electrification current values. All C 60 -doped probes examined had breakdown voltage at the same or higher level than the pure oil. The resistivity and permittivity do not depend on C 60 content. The research proves the C 60 is able to significantly improve some essential dielectric properties of mineral insulation oil, without deteriorating the others.
ISSN:0084-9162
2576-2397
DOI:10.1109/CEIDP.2009.5377723