Dielectric breakdown model for conductor-loaded and insulator-loaded composite materials.
In the present work we generalize the dielectric breakdown model to describe dielectric breakdown patterns in both conductor-loaded and insulator-loaded composites. The present model is an extension of a previous one [F. Peruani et al., Phys. Rev. E 67, 066121 (2003)] presented by the authors to describe dielectric breakdown patterns in conductor-loaded composites. Particles are distributed at random in a matrix with a variable concentration p. The generalized model assigns different probabilities P(i,k-->i('),k(')) to breakdown channel formation according to particle characteristics. Dielectric breakdown patterns are characterized by their fractal dimension D and the parameters of the Weibull distribution. Studies are carried out as a function of the fraction of inhomogeneities, p.
INIFTA (CONICET, CICPBA,Universidad Nacional de La Plata), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina.
P
P
Bergero
F
F
Peruani
G
G
Solovey
I M
IM
Irurzun
J L
JL
Vicente
E E
EE
Mola