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1
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The Internal Friction and the Relaxation Time Spectrum of Ferroelectric Ceramic PZT Type

100%
Bartkowska J., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6A
A-7-A-13
EN
The fractional Zener model with two spring-pots is proposed to description of relaxation time spectrum of ferroelectric ceramic material. This model is based on fractional calculus. The influence of values of a and b parameters on the shape of the relaxation time spectrum was investigated.
2
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Mössbauer Spectroscopy, X-Ray Diffraction and SEM Studies on Multiferroic Bi_5Ti_3FeO_{15} Ceramics

81%
Rymarczyk J., Hanc A., Dercz G., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1579-1584
EN
Magnetoelectric multiferroics are materials which exhibit both magnetic order and ferroelectricity in the same phase. Multiferroic materials, where ferroelectricity and magnetism coexist, were extensively studied. This class of materials offers a large application potential for new devices due to the two coupled degrees of freedom based on the local off-centered distortion and the electron spin. The studied Bi_5Ti_3FeO_{15} ceramics was prepared by conventional synthesis and hot uniaxial pressing reaction applying the conventional mixture of TiO_2, Fe_2O_3 and Bi_2O_3 oxides as precursor materials. The present work focuses on the structure analysis of multiferroic Bi_5Ti_3FeO_{15} ceramics performed by X-ray diffraction method, scanning electron microscopy and the Mössbauer spectroscopy methods.
3
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Ferroelectromagnetic Smart Structures (1-x)Pb(Fe_{0.5}Nb_{0.5})O_{3}-(x)BiFeO_{3}

81%
Bochenek D., Zachariasz R., Ilczuk J., Dudek J.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
274-276
EN
In this work an attempt was made to obtain three compositions of the solid solution (1-x)Pb(Fe_{0.5}Nb_{0.5})O_{3}-(x)BiFeO_{3} for x=0.8, 0.7 and 0.6. The obtained specimens were subjected to microstructure and dielectric examinations and temperature dependences of the internal friction Q^{-1}(T) and Young's modulus E(T).
4
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Processing, Microstructure and Dielectric Properties of the Bi_5Ti_3FeO_{15} Ceramic

81%
Rymarczyk J., Dercz G., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6A
A-191-A-197
EN
The aim of the present work is the analysis of microstructure, dielectric permittivity and thermal properties analysis of Bi_5Ti_3FeO_{15} ceramics obtained by two methods. The studied Bi_5Ti_3FeO_{15} ceramics were prepared by conventional synthesis and hot uniaxial pressing reaction from the conventional mixture of oxides, viz. TiO_2, Fe_2O_3, Bi_2O_3. The studied material has layered perovskite like structures, first described by Aurivillius in 1949 and Subbaro in 1969. The ceramic Bi_5Ti_3FeO_{15} is known to contain a series of compounds with the general formula: Bi_{m+1}Fe_{m-3}Ti_3O_{3m+3}. The X-ray diffraction methods were used for qualitative phase analysis of studied samples. The morphology was analyzed by scanning electron microscopy method. The thermal properties of the studied materials were measured using the differential thermal analysis at a constant heating rate of 15 K/min under an argon protective atmosphere. Thermal dependence of dielectric permittivity was studied between room temperature and 1137 K.
5
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The Determination of the Magnetoelectric Coupling Coefficient in Ferroelectric–Ferromagnetic Composite Based on PZT–Ferrite

81%
Bartkowska J. A., Bochenek D., Zachariasz R., Ilczuk J.
Archives of Metallurgy and Materials
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2013
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issue 4
6
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Influence of the Nb and Ba Dopands on the Properties of the PZT Type Ceramics

71%
Zachariasz R., Bochenek D., Dziadosz K., Dudek J., Ilczuk J.
Archives of Metallurgy and Materials
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2011
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issue 4
7
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Analysis of the Nanocrystalline Phase Formation Process in Amorphous Fe-X-Si-B Alloys

71%
Stokłosa Z., Kwapuliński P., Rasek J., Ilczuk J., Lelątko J.
Acta Physica Polonica A
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1996
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vol. 89
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issue 3
437-442
EN
The process of nanocrystalline phase formation, affecting magnetic properties, in amorphous Fe_{78}Si_{8}B_{14}, Fe_{76}Al_{2}Si_{8}B_{14}, Fe_{76}Cr_{2}Si_{8}B_{14} and Fe_{76}Mo_{2}Si_{8}B_{14} alloys has been studied in the paper. Investigations have been carried out using the electrical resistivity method, magnetic methods, transmission electron microscopy and X-ray diffraction. A nanocrystalline phase in the amorphous matrix has been obtained by isochronous or isothermal vacuum annealing. Phase composition of samples has been determined directly after manufacturing and after crystallization annealing on the basis of X-ray diffraction and electron diffraction. Transmission electron microscopy was used to determine phase morphology, dimensions of formed nanocrystalline phase and transition phase. Alloying elements have been found to affect changes of magnetic properties in amorphous and nanocrystalline states. For Fe_{76}Mo_{2}Si_{8}B_{14} alloys a significant increase in crystallization temperature, making difficult nanocrystalline phase growth and increase in thermal stability of magnetic permeability have been observed.
8
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Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi_5Ti_3FeO_{15} Ceramic Powders Obtained by Mechanical Synthesis

61%
Dercz G., Rymarczyk J., Hanc A., Prusik K., Babilas R., Pająk L., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1623-1629
EN
In this paper the structural and Mössbauer spectral properties of multiferroic ceramic Bi_5Ti_3FeO_{15} powders prepared by high-energy ball milling of polycrystalline precursor material (mixture of Bi_2O_3, TiO_2 and Fe_2O_3 powders) are presented. Mechanical synthesis was performed by high-energy vibratory mill. The X-ray diffraction methods were applied for the structure characterization of the studied samples. The parameters of diffraction line profiles were determined by PRO-FIT Toraya procedure. The crystallite sizes and lattice distortions were analyzed using the Williamson-Hall method. Investigations of hyperfine interactions in the studied materials were carried out by the Mössbauer spectroscopy. The powder morphology was analyzed by scanning electron microscopy and transmission electron microscopy techniques. It was found that during high-energy milling phase transitions, a decrease in crystallite size and amorphization process are observed.
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