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    Wyświetlanie 1-5 z 5
    Tytuł:
    Effect of Annealing, Stoichiometry, and Surface on Magnetism of (Pr,Dy)FeCoB Microparticles Ensemble
    Autorzy:
    Kablov, E. N.
    Ospennikova, O. G.
    Kunitsyna, E. I.
    Piskorskii, V. P.
    Korolev, D. V.
    Morgunov, R. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/356579.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rare earth metals
    magnets
    magnetisation
    Mössbauer spectroscopy
    X-ray spectroscopy
    Opis:
    Magnetic properties of powder (Pr,Dy)FeCoB ferrimagnetic alloys and effects of annealing, surface states were analyzed. X-ray photoelectron spectroscopy and Mössbauer spectra of powders indicate the effect of surface states on phase composition and magnetic properties of the studied powder, if particles average size is smaller than 10 μm. Effect of stoichiometry on magnetic anisotropy was found. Thermal stability of anisotropy field was proved by replacement of Fe atoms with Co atoms.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1923-1930
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards a viable method of reusing silicon carbide. Physicochemical analyses in the studies on the industrial application of the material
    Autorzy:
    Niemczyk-Wojdyla, Anna
    Fornalczyk, Agnieszka
    Willner, Joanna
    Zawisz, Rafał
    Powiązania:
    https://bibliotekanauki.pl/articles/2032847.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    silicon carbide
    X-ray spectroscopy
    Acheson process
    węglik krzemu
    spektroskopia rentgenowska
    proces Achesona
    Opis:
    The paper presents an investigation on the feasibility of recovery of the highly valuable silicon carbide (SiC) from the slurry waste generated from silicon wafer production in the photovoltaic and semiconductor industry. Compared to the other techniques of recycling, a facile and low-cost method of waste treatment via heat drying followed by low-energy mixing in a shaker mixer was proposed. As the result of the treatment, the slurry waste was converted into a powdered form with dominant content of SiC. Separated SiC material was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, and sieve analysis. In addition, analyses of the bulk density, moisture content and melting test were carried out. As was confirmed by the physicochemical analyses, the dominant sieve fraction was in the range of 0.1-0.06 mm, the purity level was a minimum 99% mass of SiC, the moisture content - 0.3%, the bulk density - 1.3 g/cm3. The physicochemical characteristics of the material were crucial for understanding the material performance, assessment of the material quality and determining the perspective directions of the industrial application. The studies revealed that the material exhibited a high application potential as abrasive, especially in abrasive grinding and waterjet cutting.
    Źródło:
    Environment Protection Engineering; 2021, 47, 4; 43-52
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon nanotubes functionalized by salts containing stereogenic heteroatoms as electrodes in their battery cells
    Autorzy:
    Zdanowska, S.
    Pyzalska, M.
    Drabowicz, J.
    Kulawik, D.
    Pavlyuk, V.
    Girek, T.
    Ciesielski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779468.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    multi-walled carbon nanotubes (MWCNT)
    battery
    bromination
    charge transfer
    X-ray spectroscopy
    electronic structure
    Opis:
    This paper concentrates on electrochemical properties of groups of multi-walled carbon nanotubes (MWCNT) functionalized with substituents containing a stereogenic heteroatom bonded covalently to the surface of the carbon nanotube. This system was tested in Swagelok-type cells. The cells comprised a system (functionalized CNT with salts containing S and P atoms) with a working electrode, microfiber separators soaked with electrolyte solution, and a lithium foil counter/reference (commercial LiCoO2 ) electrode. The electrolyte solution was 1 M LiPF6  in propylene carbonate. Using standard techniques (cyclic voltammetry/chronopotentiometry), galvanostatic cycling was performed on the cells at room temperature with a CH Instruments Model 600E potentiostat/galvanostat electrochemical measurements. Methods of functionalization CNT were compared in terms of the electrochemical properties of the studied systems. In all systems, the process of charge/discharge was observed.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 4; 22-26
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation, characterization and optimization of cross-linked fructosyltransferase aggregates for the production of prebiotic fructooligosaccharides
    Autorzy:
    Ademakinwa, A.N.
    Ayinla, Z.A.
    Omitogun, O.G.
    Agboola, F.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/81247.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fructosyltransferase
    Aureobasidium pullulans
    fructooligosaccharide
    prebiotic
    statistical optimization
    scanning electron microscopy
    X-ray spectroscopy
    Fourier transform infrared spectroscopy
    biotransformation
    chemometric analysis
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2018, 99, 4
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of a Castings Quality and Metalworking Technology. Treasure of the Bronze Age Axes
    Autorzy:
    Garbacz-Klempka, A.
    Kaczmarek, Ł.
    Kwak, Z.
    Kozana, J.
    Piękoś, M.
    Perek-Nowak, M.
    Długosz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382751.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-destructive testing
    archeometallurgy
    tin bronze
    X-ray spectroscopy
    castings defects
    badania nieniszczące
    archeometalurgia
    brąz
    spektroskopia rentgenowska
    wady odlewów
    Opis:
    Cast axes are one of the most numerous categories of bronze products from earlier phases of the Bronze Age found in Poland. They had multiple applications since they were not only used objects such as tools or weapons but also played the prestigious and cult roles. Investigations of the selected axes from the bronze products treasure of the Bronze Age, found in the territory of Poland, are presented in the hereby paper. The holder of these findings is the State Archaeological Museum in Warsaw. Metallurgical investigations of axes with bushing were performed in respect of the casting technology and quality of obtained castings. Macroscopic observations allowed to document the remains of the gating system and to assess the range and kind of casting defects. Light microscopy revealed the microstructure character of these relicts. The chemical composition was determined by means of the X-ray fluorescence method with energy dispersion (ED-XRF) and by the scanning electron microscopy with X-ray energy dispersion analysis in micro-areas (SEM-EDS). The shape and dimensions of cores, reproducing inner parts of axes were identified on the basis of the X-ray tomography images. Studies reconstructed production technology of the mould with gating system, determined chemical composition of the applied alloys and casting structures as well as revealed the casting defects being the result of construction and usage of moulds and cores.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 179-285
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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