Fractal approach to BaTiO3-ceramics micro-impedances

Mitić, Vojislav V.; Paunović, Vesna; Kocić, Ljubiša

doi:10.1016/j.ceramint.2015.01.102

Cited by 26 publications

(19 citation statements)

References 12 publications

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“…Looking back to our earlier investigations [7][8][9][10][11] we may observe several BaTiO 3 ceramics fractality sources, as it is anticipated by the points i. to v. in the section Evidences of fractality . Namely, the grain contours has f DH dimension that lies in the interval 1.1-1.3, calculated by Richardson variable yardstick method.…”

Section: Microstructure Fractal Dimension and Analysissupporting

confidence: 66%

“…Electronic microscopy methods, regardless on resolution and magnification, lead only towards getting the microscopic pictures (micro-graphs). Based on the grains and pores perimeters fractal analysis block (10,11), their reconstruction is made block (12) , and more realistic picture is obtained then if the Euclidean geometry is used block (13,14), which replaces the role of modeling, because it gives real micro-structure shapes pictures, on one hand, and from the obtained passive micro-structure picture, through the shape reconstruction, leads to the possibility of its prognoses with designed micro-structure properties block (15). Applying known syntheses phases in the technology process, the obtained samples are investigation objects in these innovations.…”

Section: Practical Proceduresmentioning

confidence: 99%

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Entropy and fractal nature

et al. 2020

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Existing, the biunivocal correspondents between the fractal nature and the nature discovered by fractals is the source and meeting point from those two aspects which are similar to the thermodynamically philosophical point of view. Sometimes we can begin from the end. We are substantial part of such fractals space nature. The mathematics fractal structures world have been inspired from nature and Euclidian geometry imagined shapes, and now it is coming back to nature serving it. All our analysis are based on several experimental results. The substance of the question regarding entropy and fractals could be analyzed on different ceramics and materials in general. We have reported the results based on consolidation BaTiO 3-ceramics by the standard sintering technology, performed with BaTiO3 and different additives (

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Section: Microstructure Fractal Dimension and Analysissupporting

confidence: 66%

Section: Practical Proceduresmentioning

confidence: 99%

Entropy and fractal nature

et al. 2020

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“…Next, they determined the fractal dimension of the surface of BaTiO 3 -ceramic-grains [31] and obtained the result 2.010 <DH grain surface < 2.085. Finally, the result 2.7529 <DH BaTiO3 <2.8025 have been obtained for the surface of ceramic bulk [32]. These results were obtained for barium-titanate ceramics without additives.…”

Section: Fractal Modelssupporting

confidence: 52%

The fractal nature approach in ceramics materials and discrete field simulation

et al. 2018

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In this paper, we present experimental data of static fractals and compare the results with theoretical analysis obtained using dynamic particle simulation. The fractal simulator presented in this manuscript is pioneer work and it is the base of the future concrete and industrial applications. We have examined sintered ceramic samples formed using several different additives, as fabricated using various parameters, sintering temperature and time. SEM analyses were performed on samples as a part of the experimental characterization procedure. Based on microstructures, sets of points have been selected as a primary database input for the theoretical-experimental simulation to model the processes that describe the experiment. For all grain and pore analyses, the fractal nature is recognized as a matter of substantial influence on material characteristics. All of our experimental and theoreticalexperimental procedures are based on the construct that reconstruction of the grain and pore fractal nature is of enormous importance for microstructure property prognoses. The method presented here can be used to simplify and simulate, in real time, the interaction of a few thousand electrically charged particles possessing different masses through formulations based on Maxwell's electromagnetic equations. Particles in simulation interact with alternating (or static) electromagnetic fields and with static ceramics surface at the same time. All values are treated numerically. The fractal simulator consists of two components, a structure fractal generator, and field simulator. The functions for particle motion can be implemented and changed within the program in real time. The algorithm is written in the Delphi programming environment. The main result of this paper describes a quite new approach in the analysis of material microstructure properties towards programmingprognoses of the final properties of ceramic materials using the fractal nature within the fractal field simulator that generates structures, grains, and pores. The new simulator algorithm is developed as the important tool for the realization of the much ambitious project-simulation and realization of the Tesla's Fountain in ceramics. The concrete results will follow with this project realization in near future.

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“…Homogenization and absence of agglomerates is achieved. This is a good precondition for efficient sintering process [14][15][16][17].…”

Section: Sample Characterizationmentioning

confidence: 99%

Structural, morphological and electrical properties of alumina/YAG composites as solid electrolyte for IT - SOFC

Egelja¹,

Pašalić²,

Dodevski³

et al. 2018

SCI SINTER

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Alumina/YAG composites (AYX_t) with high relative density (99.2 %TD) were successfully obtained by mixing commercial alumina powder with different volume fractions of yttrium aluminium garnet (Y 3 Al 5 O 12-YAG; 7, 14, 21 and 28). YAG was synthetized by nitrate glycine reaction in the form of precursor powder. Polycrystalline YAG powder was obtained by calcination at 950 °C for 2 h. Additionally, obtained compositions were characterized by XRD, SEM, EDX and electrochemical impedance spectroscopy. By XRPD analysis was found that the particle size of YAG powders lies in the nanometric range (being lower than 35 nm). By SEM microphotographs of composites were confirmed the formation of a conductive path consisting from mutually interconnected YAG particles. This was confirmed by the electrochemical impedance spectroscopy. The highest electrical conductivity of grain (κ g) and grain boundary (κ gb) at 700 ºC amounted to 2.22×10-2 Ω-1 cm-1 and 9.44×10-3 Ω-1 cm-1 , respectively, was measured in the composite containing 21 vol% of YAG.

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Fractal approach to BaTiO3-ceramics micro-impedances

Cited by 26 publications

References 12 publications

Entropy and fractal nature

Entropy and fractal nature

The fractal nature approach in ceramics materials and discrete field simulation

Structural, morphological and electrical properties of alumina/YAG composites as solid electrolyte for IT - SOFC

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