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Wyszukujesz frazę "copper oxide" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Morphology and properties of the graphene layer on the copper substrate
    Autorzy:
    Pietrzak, K.
    Olesińska, W.
    Strąk, C.
    Siedlec, R.
    Gładki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778091.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    copper
    graphene
    graphene oxide
    reduced graphene oxide
    Opis:
    The aim of the work presented in the article was to clarify controversial comments about anti-corrosion and mechanical properties of graphene coatings, deposited on copper substrates. It was designed special experimental cycle comprising: preparation of graphene forms and copper, the observation of layers Cu / GO (rGO) after the thermal reduction processes and oxidative test in air at 150°C temperature and 350 h in time. The resulting coatings and graphene layers were subjected to tribological test for hardness. The observed differences in the continuity of the coverage copper surface by graphene forms, allowed to understand the macroscopic effect of increased hardness and wear resistance layers rGO/Cu.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 4; 104-108
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of Copper-based Multi-walled Carbon Nanotube Composites
    Autorzy:
    Domagała, K.
    Borlaf, M.
    Kata, D.
    Graule, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/355954.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    MWCNT
    water treatment
    copper
    cuprous oxide
    cupric oxide
    Opis:
    In this study, the synthesis of copper-based multi-walled carbon nanotube compositesis described. Over the last years, carbon nanotubes (CNTs) have been widely used in many scientific research fields and have found applications in several sectors, e.g. for water treatment. This work focuses on combining the exceptional characteristics of CNTs, such as high specific surface areaand antibacterial properties, with the antimicrobial / antivirus features of copper oxides. The influence of synthesis parameters and thermal treatment on the final product was studied. Copper leakage was evaluated at both pH 5 and pH 7, confirming the possibility of applying Cu-based MWCNT composites in water filtration systems.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 157-162
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of Copper Doped Neodymium Nickelate Oxide as Cathode Material for Solid Oxide Fuel Cells
    Autorzy:
    Lee, K. J.
    Choe, Y-J.
    Hwang, H-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/351292.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    solid oxide fuel cells
    copper
    electrical conductivity
    excess oxygen
    Opis:
    Mixed ionic and electronic conducting K2NiF4-type oxide, Nd2Ni1-xCuxO4+δ (x=0~1) powders were synthesized by solid state reaction technique and solid oxide fuel cells consisting of a Nd2Ni1-xCuxO4+δ cathode, a Ni-YSZ anode and ScSZ as an electrolyte were fabricated. The effect of copper substitution for nickel on the electrical and electrochemical properties was examined. Small amount of copper doping (x=0.2) resulted in the increased electrical conductivity and decreased polarization resistance. It appears that this phenomenon was associated with the high mean valence of nickel and copper and the resulting excess oxygen (δ). It was found that power densities of the cell with the Nd2Ni1-xCuxO4+δ (x=0.1 and 0.2) cathode were higher than that of the cell with theNd2NiO4+δ cathode.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 625-628
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological properties of Cu based composite materials strengthened with Al2O3 particles
    Autorzy:
    Kaczmar, J.
    Granat, K.
    Grodzka, E.
    Kurzawa, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381312.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metal matrix composite
    copper
    aluminium oxide particles
    tribological properties
    wear resistance
    friction coefficient
    Pin-on-disc tester
    kompozyt metalowy
    miedź
    tlenek aluminium
    właściwości tribologiczne
    odporność na ścieranie
    współczynnik tarcia
    Opis:
    In the present work copper was strenghtened with 20 and 30 vol. % of alumina particles characterized by diameter of 3-6μm. The copper based composite materials were manufactured by the squeeze casting method. Preheated preforms made from Al2O3 particles were placed in the desired place in the heated cast die and the squeeze casting process with liquid copper was performed applying the infiltration pressure of 90MPa and pressure was kept for 10-15s until solidification was complete. The microstructure and physical properties: Brinell hardness (HBW) and density were characterized. Metallografic examinations showed that alumina particles were uniformly distributed in the copper matrix. Hardness of 208 HBW for composite materials containing 30 vol.% of particles was achieved. Wear investigations were performed applying the tribological pin-on-disc tester. Friction forces between copper based composite materials containing 20 and 30 vol. % of Al2O3 particles and cast iron were registered and wear was determined on the base of the specimen mass loss after 1.0, 3.5 and 8.5 km friction distance.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2s; 33-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of vanadium and potassium compounds from the spent vanadium catalyst from the metallurgical plant
    Autorzy:
    Mazurek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/779744.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    kwas siarkowy
    tlenek siarki
    katalizatory wanadu
    ługowanie
    wanad
    potas
    miedź
    cynk
    arsen
    ołów
    XRF
    sulfuric acid
    sulfur oxide
    spend vanadium catalysts
    leaching
    recovery
    vanadium
    potassium
    copper
    zinc
    arsenic
    lead
    Opis:
    A spent vanadium catalyst, from the plant of metallurgical type, was leached in a sulfuric acid solution to recover vanadium and potassium compounds. The effect of time, temperature, concentration of acid, catalyst particle size and phase ratio was studied. Additionally the concentration of iron, copper, zinc, arsenic and lead compounds was determined. The flow sheet for the proposed process of spent vanadium catalyst leaching is presented.
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 2; 49-53
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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