Abstract
The use of additives to insulting materials is one of the methods
to improve certain properties of these materials. Additives can
also be used to provide more insight into some processes like
conduction, space charge formation and breakdown under certain
conditions of field application.In the present paper, the effect
of the addition of fine particles 1wt% BaTiO3 to plain low density
polyethylene (LDPE) on the short-term dc breakdown strength of
LDPE at room temperature was investigated. The characteristics of
the use polyethylene are as follows: density 0.925 g/cm3, melt
index 0.25 g/10 min. The BaTiO3 used was laboratory grade with
particle size less than 7 um. Special cylindrical test samples of
both undoped and doped materials were used in this investigation.
Stainless steel hemispherically tipped electrodes were embedded in
the material by moulding. The mean value of the gap length between
the electrodes was 0.25 mm. The design of the test sample allows
for determining the intrinsic breakdown strength of the material.
The Weibull plots were used to analyse the breakdown test results.
Analysis of the results indicate that the addition of BaTiO3 to
LDPE has reduced the short term dc breakdown strength of the doped
material by about 16% if compared with the corresponding value for
the plain LDPE.An attempt s made to correlate between the present
results, and earlier published results about the effect of BaTiO3
on dc conductivity and space charge formation in LDPE.
| Original language | English |
|---|---|
| Journal | Conference Record of the 1996 IEEE International Symposium on Electrical Insulation |
| Pages (from-to) | 654-656 |
| Publication status | Published - 1996 |
| Event | 1996 IEEE International Symposium on Electrical Insulation - Montreal, Quebec, Canada Duration: 16 Jun 1996 → 19 Jun 1996 |
Conference
| Conference | 1996 IEEE International Symposium on Electrical Insulation |
|---|---|
| Country/Territory | Canada |
| City | Montreal, Quebec |
| Period | 16/06/1996 → 19/06/1996 |