Polarization and electrical conductivity of some engine oils as disperse systems

Authors

  • Игорь Васильевич Изместьев (Igor V. Izmestiev) Perm State University
  • Оксана Андреевна Кожевникова (Oksana A. Kozhevnikova) Perm State University

DOI:

https://doi.org/10.17072/1994-3598-2016-1-43-50

Abstract

The main characteristics of engine oil are viscosity and an index of viscosity. Viscosity of oil η and its specific electric resistance is correlated with each other. Therefore their simultaneous research is of interest. Considering that fact that this communication is still insufficiently studied, and the electric equipment is constantly improved, the experimental study of four synthetic engine oil of the Castrol, Shell and Ravenol companies is undertaken. In the range of temperatures from 40 to 100 °C conductivity, polarization and dielectric losses were measured. It was supposed that all oils represent dispersion medium in which into dispersive environment (basic oil) as ideal dielectric in the form of disperse phases is introduced additives part from which are ionogenic. All oils are unpolar dielectrics with exponential increase in specific electric conductivity from 17–130 nS/m at 40 °C to 0.18–1.12 mcS/m at 100 °C. Dispersion of dielectric permitivity with frequencies below 10 kHz is caused by electrode polarization. Energy of activation of specific electric conductivity γ in a temperature interval for all oils is in area 0.35–0.40 eV and is defined not only viscosity of the dispersion medium, but also energy of dissociation of ionogenic additives.Received 14.01.2016; accepted 03.03.2016

References

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Published

2017-03-04

How to Cite

Изместьев (Igor V. Izmestiev) И. В., & Кожевникова (Oksana A. Kozhevnikova) О. А. (2017). Polarization and electrical conductivity of some engine oils as disperse systems. Bulletin of Perm University. Physics, (1(32). https://doi.org/10.17072/1994-3598-2016-1-43-50

Issue

Section

Regular articles