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    Wyświetlanie 1-9 z 9
    Tytuł:
    Electrophysical Properties of the Multicomponent PbFe1/2Nb1/2O3 Ceramics Doped by Li
    Autorzy:
    Bochenek, D.
    Niemiec, P.
    Adamczyk, M.
    Stokłosa, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/355328.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ferroelectromagnetic
    multiferroics
    PFN
    Opis:
    The paper presents the results of research on the influence of sintering temperature on microstructure, DC electrical conductivity, dielectric, ferroelectric and magnetic properties of PbFe1/2Nb1/2O3 ceramics doped by Li in the amount of 5.0% wt., in the abbreviation PLiFN. The ceramic samples of the PLiFN material were obtained by the two-stage synthesis – columbite method and sintered by free sintering methods. Introduction to the basic PbFe1/2Nb1/2O3 composition of the lithium admixture to decrease the electrical conductivity and reduction of dielectric loss. The tests have shown that the increase in sintering temperature orders the PLiFN ceramic microstructure, which has a positive effect on its electrophysical properties. At room temperature, the PLiFN ceramic samples show both ferroelectric and ferromagnetic properties. Considering the functional parameters of the obtained ceramic samples, the optimal technological conditions are 1100°C/2 h.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 227-233
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Lanthanum Dopant on the Structure and Electric Properties of BaBi2Nb2O9 Ceramics
    Autorzy:
    Adamczyk-Habrajska, M.
    Goryczka, T.
    Szalbot, D.
    Dzik, J.
    Rerak, M.
    Bochenek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/353535.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ferroelectric relaxor
    ceramics
    impedance spectroscopy
    Opis:
    The paper reports the consequences of lanthanum modifications of barium bismuth niobiate (BaBi2 Nb2 O9) ceramics. The discussed materials were prepared by solid state synthesis and a one-step sintering process. The investigations are focused on dielectric aspects of the modification. The presented results reveal that the trivalent lanthanum ions incorporate twovalent barium ions, which is connected with the creation of A-site cationic vacancies as well as oxygen vacancies. Such a scenario results in significant decreasing in grain boundaries resistivity. The activation energy of grain boundaries conductivity is significantly reduced in the case of lanthanum admixture.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 207-214
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Sr2+ Dopant on Microstructure and Electric Properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) Ceramics
    Autorzy:
    Radoszewska, D.
    Goryczka, T.
    Adamczyk, M.
    Wodecka-Duś, B.
    Bochenek, D.
    Kozielski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/352406.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstructure
    Sr2+
    electric properties
    (BaxCa1-x)(ZryTi1-x)O3
    Opis:
    The discovery of (BaxCa1-x)(ZryTi 1-x)O3 lead-free ceramics drawn a lot of attention to those novel materials because of their excellent piezoelectric properties. However, quite a little attention has been paid to other features of the material. This article reports a wide range of research, including composition, structure and microstructure, dielectric response and impedance spectroscopy in order to systematize and expand knowledge about this peculiar ceramics and strontium doping effect on its properties. In order to test that influence a series of samples with various strontium concentration, precisely the admixtures of 0.02, 0.04 and 0.06 mol% were prepared, as well as basic ceramics to compare obtained results.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1295-1302
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of La3+ Doping Effect on Piezoelectric Coefficients of BLT Ceramics
    Autorzy:
    Wodecka-Dus, B.
    Kozielski, L.
    Erhart, J.
    Pawełczyk, M.
    Radoszewska, D.
    Adamczyk, M.
    Bochenek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/352118.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    BLT
    piezoelectric coefficients
    Lead-free piezoelectric ceramics
    Opis:
    Effects of La3+ admixture in barium lanthanum titanate (BLT) ceramics system with colossal permittivity on performance of prospective piezoelectric cold plasma application were studied. Usage of cold atmospheric pressure plasma appears promising in terms of industrial and healthcare applications. Performed investigation provide consistent evaluation of doping lanthanum amount on piezoelectric coefficients values with simultaneous capability of charge accumulation for effective plasma generation. Modification of ferroelectric materials with heterovalent ions, however with the lower radii than the original atoms, significantly affects their domain mobility and consequently electromechanical properties. To determine the piezoelectric coefficients, the resonanceantiresonance method was implemented, and values of piezoelectric and dielectric parameters were recorded. Finally the results indicated that addition of 0.4 mol.% of La3+ ions to the ceramic structure maximally increased the values of piezoelectric coefficient to d33 = 20 pC/N and to huge dielectric constant to ε33 T = 29277.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 691-696
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PLZT microfibers technology optimization
    Autorzy:
    Kozielski, L.
    Adamczyk, M.
    Feliksik, K.
    Bochenek, D.
    Clemens, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/958205.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Electrocaloric Efect
    piezoelectric fibers
    ferroelectric properties
    Opis:
    Electrocaloric (EC) structures for a new generation of cooling or heating elements utilize the temperature dependence of spontaneous polarization in some ferroelectric materials to convert waste heat into electricity and vice versa. A (Pb0.93La0.07) (Zr0.65Ti0.35)O3 material, have the largest recorded pyroelectric coefficient. An effective predicted form for such applications is fiber, due to small heat capacitance and quick response time, even for nano second laser excitation. Consequently, the presented work provides a description of the optimization of structural, ferroelectric and piezoelectric properties of obtained fibers, finally concluding on necessity of sintering temperature reduction in 100°C in contrast to bulk form to effectively prevent its destruction.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1471-1476
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Technology and Structural Properties of Special Glass Modified (Ba0.6Pb0.4)TiO3 Ceramics
    Autorzy:
    Wodecka-Dus, B.
    Adamczyk, M.
    Goryczka, T.
    Dzik, J.
    Radoszewska, D.
    Kozielski, L.
    Bochenek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/351884.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    (BaxPb1−x)TiO3 ceramics
    special glasses
    SEM microstructures
    XRD measurements
    Opis:
    The present paper widely describes the details of technology of (Ba0.6Pb0.4)TiO3 ceramics modified with PbO-B2O3-Al2O3-WO3 special glass, as well as the influence of admixture on the microstructure and crystal structure of basic material. The microstructure investigations reveal the significant increase of grain size and a decrease of pores participation in volume of modified samples, whereas the X-Ray Diffraction (XRD) measurements show a decrease of the volume of unit cell. The obtained results are discussed due to processes occurring during the sintering process at high temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1761-1766
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technology and Electrophysical Properties of the (K0.44Na0.52Li0.04)NbO3 Ceramics Doped by Cr3+, Zn2+, Sb3+ or Fe3+
    Autorzy:
    Bochenek, D.
    Osińska, K.
    Niemiec, P.
    Adamczyk, M.
    Goryczka, T.
    Szych, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/356149.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lead free ceramics
    KNLN ceramics
    SEM microstructure
    dielectric tests
    Opis:
    In the work five ceramic compounds based on the (K0.44Na0.52Li0.04)NbO3 (KNLN) material modified with oxides: Cr2O3, ZnO, Sb2O3 or Fe2O3 (in an amount of 0.5 mol.%) were obtained. The KNLN-type composition powder was prepared by solid phase synthesis from a mixture of simple oxides and carbonates, while compacted of the ceramic samples was conducted by free sintering methods. In the work the effect of the used admixture on the electrophysical properties of the KNLN ceramics was presented. The XRD, EDS tests, the SEM measurements of the morphology ceramic samples, dielectric properties and DC electric conductivity were conducted. The research showed that the used admixtures introduced into the base of KNLN-type composition improve the microstructure of the ceramic samples and improve their sinterability. In the case of the dielectric measurements, it was observed a decrease in the maximum dielectric permittivity at the TC for dopred KNLN-type samples. The addition of an admixture of chromium, zinc, antimony or iron in an amount of 0.5 mol.% to the base composition (K0.44Na0.52Li0.04)NbO3 practically does not change the phase transition temperature. The diminution in the density value of doped KNLN ceramics was attributed to the alkali elements volatilization.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1401-1409
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of phase transition in Bi3TiNbO9-BaBi2Nb2O9 ceramics
    Autorzy:
    Adamczyk, M.
    Kusz, J.
    Hofmeister, W.
    Zubko, M.
    Kozielski, L.
    Pilch, M.
    Bochenek, D.
    Wodecka-Duś, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/353210.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dielectric properties
    X-ray methods
    grain size
    phase transition
    ceramics
    Opis:
    The subject of the paper is lead free bismuth layer structure oxides (1-x)Bi3TiNbO9-xBaBi2N2O9(x=0; 1; 2; 3 mol). The influence of Bi3TiNbO9/BaBi2Nb2O9 ratio on dielectric and structural properties was studied in a wide range of temperatures. Change in the ratio causes a decrease in the maximum value of dielectric permittivity and shifts the temperature of ε`max to low values, leading to linear decreasing of average grain size and linear increasing of ceramics density. These results indicate an augment of the packing degree and the participation of pores are significantly decreased with the increase of BaBi2Nb2O9compound intake. Moreover, for 0.7Bi3TiNbO9-0.3BaBi2Nb2O9 ceramics the dielectric phase transition is broadened and the properties characteristic for the ferroelectric relaxor appear.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1503-1510
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Multicomponent PZT-Type Ceramics for Micromechatronic Applications
    Autorzy:
    Bochenek, D.
    Niemiec, P.
    Adamczyk, M.
    Skulski, R.
    Zachariasz, R.
    Wodecka-Duś, B.
    Machnik, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/353571.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multicomponent PZT-type ceramics
    piezoelectrics
    micromechatronics
    actuators
    Opis:
    In the paper two compositions of the multi-component PZT-type ceramics admixtures by Mn4+, Sb3+, W6+, Ni6+ were presented. The ceramic powders were synthesized by the calcination of powders while their densification was carried out by free sintering method. The dielectric, ferroelectric, piezoelectric studies and DC electrical conductivity of the multicomponent PZT-type samples were presented. The results of the multi-component ceramics predispose these type materials in micromechatronic and microelectronic applications for example as element of the actuators.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 667-672
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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