Electrical field coefficient of insulation material

Electrical field strength coefficient of the specific direct current conductivity of insulation material. Often the symbol $\beta$ is used.

Symbol
$\gamma_i$
Unit
mm/kV
Choices
MaterialValueReference
PE0.121HanyuYe2011 (MDPE type B)
HDPE0.121HanyuYe2011 (MDPE type B)
XLPE0.032Diban2020 (XLPE low)
XLPEf0.0645Diban2020 (XLPE medium)
PVC0.05none
EPR0.05none
IIR0.05none
PPLP0.08Jeroense1997
Mass0.03Jeroense1997
OilP0.08Jeroense1997)
PP0.03none
SiR0.05none
EVA0.05none