Author(s):
1. Vojislav V. Mitić, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
2. Hans Jirgin Feht, Univerzitet Ulm, Odeljenje za materijale, Germany
3. Ljubiša Kocić, Univeristy of Niš, Faculty of Electronic Engineering, Serbia

Abstract:
Through our uptoday research we recognize that BaTiO3 and similar ceramics have fractal configuration nature based on three different phenomena. First, ceramic grains has fractal shape seeing as a contour in cross section or as a surface. Second, there are so called “negative space” made of pores and inter-granular space. Being extremely complex, the pore space plays an important role in microelectronic, PTC, piezoelectric and other phenomena. Third, there is process of Brownian (fractal) motions inside the material during sintering in the form of micro-particles flow: ions, atoms and electrons. These triple factors, in combination, make the microelectronic environment of very peculiar electro-static/dynamic combination. The stress in this note is set on inter-granular micro-capacity and micro-resistance, the main components affecting overall impedances distribution. Con¬struc¬tive fractal theory allows recognizing micro-capacitors with fractal electrodes. The method is based on iterative process of interpolation which is compatible with the model of grains itself. Inter-granular permeability is taken as a function of temperature as fundamental thermodynamic parameter.

Key words:
BaTiO3-ceramics, fractals, microstructure, micro-impedances.

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
23.07.2015.

Conference:
Contemporary Materials 2015 - Savremeni Materijali

Abstract