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Wyszukujesz frazę "Dulian, P." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Modyfication of photocatalytic properties of titanium dioxide by mechanochemical method
    Autorzy:
    Dulian, P.
    Buras, M.
    Żukowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778307.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    mechanochemistry
    high-energy ball milling
    titanium dioxide
    photocatalysis
    Opis:
    The paper presents a simple way to improve the photocatalytic properties of titanium dioxide using mechanochemical method. The TiO2 (Anatase) powders was subjected to high-energy ball milling in dry environment and in methanol. It has been shown that it is possible to induce the phase transformation from Anatase to Rutile and produce a material with a higher photocatalytic activity in the UV light. Physicochemical characteristics of the products were based on the following methods and techniques: X-ray powder diffraction (XRD), IR and UV-Vis (DR) spectroscopy, measurements of specific surface area (BET). The photocatalytic activity of the powders was measured in the decomposition reaction of methyl orange in water.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 3; 68-71
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Study of Phases Forming in Niobium-Antimony Oxides System upon High Temperature Treatment and High-Energy Ball Milling
    Autorzy:
    Dulian, P.
    Piz, M.
    Filipek, E.
    Wieczorek-Ciurowa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375256.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    Opis:
    The compound $SbNbO_4$ that is formed in a ternary system of Nb-Sb-O has been obtained for the first time by high-energy ball milling of the equimolar mixture of oxides $Sb_2O_3$/$Nb_2O_5$ in argon atmosphere. This compound was characterised by X-ray diffraction, differential thermal analysis- thermal gravimetry, infrared, and scanning electron microscopy methods and its properties were compared with those of $SbNbO_4$ also obtained as a result of high-temperature reaction between the same oxides and also in argon atmosphere. As shown by differential thermal analysis results, irrespective of the method of synthesis, $SbNbO_4$ is stable in argon atmosphere up to ≈ 1125°C and in air up to ≈ 800°C. The compound can be applied as a photocatalyst in the reaction of producing hydrogen from water.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 938-942
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A High-Energy Ball Milling as a Useful Technique for the Synthesis of $CaCu_3Ti_4O_{12}$ Electroceramics
    Autorzy:
    Dulian, P.
    Bąk, W.
    Kajtoch, Cz.
    Wieczorek-Ciurowa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375214.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.22.Gm
    81.05.-t
    Opis:
    This paper shows that $CaCu_3Ti_4O_{12}$ (CCTO) can be synthesized through the high-energy ball milling of CaO, CuO and $TiO_2$ powders. The dielectric characterization of CCTO obtained mechanochemically as well as, for comparison, by a high-temperature method is presented. Moreover, it is illustrated that zirconium oxide in contrast to a metallic iron generated during milling processes improves the properties of CCTO in terms of ceramic capacitors.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 931-937
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alternative, Direct Synthesis Method of the Ceramic Solid Solutions Based on BaTiO3 Through a High Energy Ball Milling
    Autorzy:
    Bąk, W.
    Dulian, P.
    Garbarz-Glos, B.
    Czekaj, D.
    Lisińska-Czekaj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/351595.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ceramics
    mechanochemical synthesis
    dielectric properties
    phase transitions
    ferroelectrics
    Opis:
    Polycrystalline samples BaTiO3 and the solid solutions Ba0.9 Sr0.1 TiO3, 0.9 Sr0.1 Ti0.9 Sn0.1 O3, Ba0.9 Sr0.1 Ti0.8 Sn0.2 O3 were obtained by means of a mechanochemical treatment based on the high-energy ball milling technique and next a high temperature solid state reaction method. The influence of synthesis condition on microstructural, dielectric and ferroelectric properties of obtained solid solutions were investigated. The structure and morphology of the investigated samples were characterized by an X-ray diffraction (XRD) and scanning electron microscopy (SEM). The characterization of electrical properties of the ceramics within the temperature range from –130°C to 250°C were performed by means of a dielectric spectroscopy method at the frequency ranging from 0.1 Hz to10 MHz. The diffusion of the paraelectric – ferroelectric phase transition and dielectric relaxation for ceramic samples are described.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 805-810
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Application of the Mechanochemical Synthesis for the Preparation of Advanced Ceramics Based on Barium Titanate
    Autorzy:
    Garbarz-Glos, B.
    Bąk, W.
    Budziak, A.
    Dulian, P.
    Lisińska-Czekaj, A.
    Czekaj, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/351521.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    BaTiO3
    mechanochemical synthesis
    X-ray methods
    dielectric properties
    Opis:
    In the present study, the lead-free BaTi1-x Zrx O3 (for x = 0, 0.05 and 0.15) ceramics were prepared by High-Energy Ball Milling and heat treatments. The performed X-ray, SEM and EDS measurements confirmed high purity, good quality and the expected quantitative composition of the obtained samples. The study of dielectric properties was performed by means of broadband dielectric spectroscopy at the frequency ranging from 0.1 Hz to 10 MHz. The obtained measurement data, analyzed in accordance with the Arrhenius formalism demonstrated the presence of relaxation type dielectric mechanisms. The impedance answer of studied ceramic materials indicated the presence of two relaxation processes: one with a dominant resistive component and the other with a small capacitive component. The observed dielectric relaxation process is temperature dependent and has a “non-Debye” character.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 4; 1391-1396
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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