Abstract:
Space charge accumulation in dielectrics is a hot
topic among dielectric research group for more than a decade.
The charge accumulation has been observed to be of various
types like homo, hetero and packet charge, etc. Volume
resistivity and its non-uniform distribution has been suspected
for formation of space charge. The author has recently shown
that apart from volume resistivity, diffusion coefficient plays a
significant role on the type of charge formation. Several issues
still remain unaddressed. In the current paper, the author
investigates the role of internal properties like volume
resistivity and diffusion and external parameters like boundary
conditions or condition of electrodes on the formation of space
charge more clearly. It has been shown that manipulation in
any of the parameters can alter the type of charge formation. It
shows a direction for investigation of new insulation materials
with suitable material properties and suitable boundaries for
minimizing space charge effects. Interesting results have been
presented that seem to have not been presented earlier.
