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Search results for: PROTECTIVE CERAMIC COATINGS, MANGANESE-COPPER SPINEL, SOFC/SOEC, ELECTRICAL PROPERTIES, INTERCONNECTS
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Renewable Energy Sources on the Polish Electrical Energy Market
PublicationProduction of electricity from renewable energu sources in Poland is presented in the paper.The machanism of energy origin certifikates market and the proposal of mechanism modification are discused.
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Bbulk solids flow in silos by electrical capacitance tomography
PublicationW artykule przedstawiono wyniki doświadczeń w silosach z zastosowaniem elektrycznej tomografii pojemnościowej do pomiaru zmian wskaźnika porowatości.
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Unraveling the role of boron dimers in the electrical anisotropy and superconductivity in boron-doped diamond
PublicationWe use quantum mechanics (QM) to determine the states formed by B dopants in diamond. We find that isolated B sites prefer to form BB dimers and that the dimers pair up to form tetramers (BBCBB) that prefer to aggregate parallel to the (111) surface in the <110> direction, one double layer below the H-terminated surface double layer. These tetramers lead to metallic character (Mott metal Insulator Transition) with holes in the...
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Composite Materials Based on Polymer-Derived SiCN Ceramic and Disordered Hard Carbons as Anodes for Lithium-Ion Batteries
PublicationNew composite materials based on polymer-derived SiCN ceramics and hard carbons were studied in view of its application as anodes for lithium-ion batteries. Two kinds of composites were prepared by pyrolysis of the preceramic polysilazane (HTT1800, Clariant) at 1000 °C in Ar atmosphere mixed with hard carbons derived from potato starch (HC_PS) or with a hard carbon precursor, namely potato starch (PS), denoted as HTT/HC_PS and...
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Funcionality assessment of Citrus Hysteria peel as a protective barrier using gas chromatography
PublicationThe aim of this study was to analyse the volatile fractions of fruit peel and pulp using two-dimensional gas chromatography technique coupled with mass spectrometry. The isolation of the compounds was achieved by microextraction to the stationary phase from the headspace of the sample (HS-SPME). Mass spectrometry with time-of-flight analyser (TOF-MS) was used to identify the chemical compounds. There are no reports in the literature...
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Unraveling the Protective Effects of Cognitive Reserve on Cognition and Brain: A Cross-Sectional Study
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Evaluation of Analytes Characterized with Potential Protective Action after Rat Exposure to Lead
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Depression among young adults – risks and protective factors in the COVID-19 pandemic
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A Comparative Analysis of Thermoelectric Modules for the Purpose of Ensuring Thermal Comfort in Protective Clothing
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Evaluation of the Mechanical Parameters of Ultrasonically Welded Textile Composite Structures for Protective Footwear
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Assessment of the Thermal Effectiveness of Mineral Warmers for Protective Gloves Used in Cold Environments
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Sythesis and Characterization of Optical Sol-Gel Adhesive for Military Protective Polycabonate Resin.Wytwarz
PublicationPrzedstawiono proces syntezy spoiw optycznych do laminatów poliwęglanowych. Scharakteryzowano właściwości optyczne i mechniczne. W procesie syntezy zastosowano monitoring ramanowski do diagnostyki przebiegu bazowych reakcji chemicznych.
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Electrochemical, theoretical and surface physicochemical studies of the alkaline copper corrosion inhibition by newly synthesized molecular complexes of benzenediamine and tetraamine with π acceptor
PublicationTwo charge transfer complexes, namely [(BDAH)+(PA−)] CT1 [(BTAH)2+(PA−)2] and CT2 (BDAH = 1,2-benzenediamine, BTAH = 1,2,4,5-benzenetetramine, and PA− = 2,4,6-trinitrophenolate), were synthesized and fully characterized using various spectroscopic techniques. CT1 and CT2 were tested as inhibitors to effectively control the uniform and anodic corrosion processes of copper in an alkaline electrolyte (1.0 M KOH) using various electrochemical...
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The Influence of Magnetron Sputtering Process Temperature on ZnO Thin-Film Properties
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Electrical conductivity relaxation measurements - water uptake of BaCe0.6Zr0.2Y0.1Tb0.1O3-δ
Open Research DataFor Electrical Conductivity Relaxation (ECR) measurements, platinum reversible electrodes were applied in a four-probe arrangement and the BaCe0.6Zr0.2Y0.1Tb0.1O3-δ sample was measured in the ProboStat™ measurement system. The ECR measurements were performed in air in the temperature range of 450-800 ℃ after switching water partial pressure between...
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Electrical conductivity of the (Ce0.80Gd0.20)O1.90 pellet at different oxygen partial pressures
Open Research DataThis dataset contains results electrical conductivity measurements of dense (Ce0.80Gd0.20)O1.90 (CGO-20) pellet. DC electrical conductivity measurements of CGO-20 were performed by the Van der Pauw method between 900 °C and 450 °C with 50 °C step. Studies were performed at different oxygen partial pressures (100%, 20% and 1%) under humidified (~4...
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Defining efficient modes range for plasma spraying coatings
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Adhesion of organic coatings to hot-dip galvanized steel
PublicationDuplex systems provide long-time corrosion protection, much longer than the sum of the lifetimes of zinc and paint used individually. However loss of adhesion between coating and zinc substrate is often found in practice. Different methods of zinc surface preparations are used in the fi eld. The aim of this study was to examine and compare coating protection when the old zinc surface, stored during long-time period (15 years) in...
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Gold nanoparticles and their coatings, their effect on cells and their interaction with radiation
PublicationTwo nanometre gold nanoparticles (AuNPs), bearing sugar moieties and/or polyethylene glycolamine (PEG-amine), were synthesised and evaluated for their in vitro toxicity and ability to radiosensitise cells with 220 kV and 6 MV X-rays, using four cell lines representing normal and cancerous skin and breast tissues. In addition to the observed intrinsic cancer-selective chemotoxicity, these AuNPs acted as radiosensitisers in combination with...
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Electrophoretic Deposition of Chitosan Coatings on the Porous Titanium Substrate
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Measurement microsystem for high impedance spectroscopy of anticorrosion coatings
PublicationW artykule przedstawiono mikrosystem do pomiarów bardzo dużych impedancji ukierunkowany na identyfikację parametrów powłok antykorozyjnych metodą spektroskopii impedancyjnej. Do wyznaczania składowych ortogonalnych sygnałów pomiarowych zastosowano w nim technikę cyfrowego przetwarzania sygnałów. Pozwoliła ona na uzyskanie szerokiego zakresu częstotliwości pomiarowych, zwłaszcza bardzo niskich, od ćHz, przy zachowaniu prostej konstrukcji...
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On the use of bilinear transformation for parameter identification of anticorrosion coatings
PublicationW artykule przedstawiono metodę identyfikacji parametrów powłok antykorozyjnych modelowanych wieloelementowymi układami zastępczymi. Metoda wykorzystuje właściwości przekształcenia biliniowego, które umożliwia przedstawienie funkcji układowej wieloparametrowego modelu jako funkcji każdego indywidualnego parametru. Odwrotne przekształcenie biliniowe pozwala na wyznaczenie wartości każdego z parametrów modelu z osobna na podstawie...
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Electrochemical approach to evaluate the interlayer adhesion of organic coatings
PublicationZastosowano elektrochemiczną spektroskopię impedancyjną do wyznaczania międzywarstwowej adhezji w powłokach organicznych. Zbadano różne zestawy powłok do ochrony samochodów. Zastosowano dwie elektrody wykonane z prądoprzewodzącego tuszu umieszczone pomiędzy warstwami powłokowymi. Stwierdzono, że utrata adhezji międzywarstwowej następuje podobnie jak zmiany energii aktywacji przewodnictwa jonowego w obszarze międzywarstwowym. Uzyskane...
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Effect of WC on electroposition and corossion behaviour of chromium coatings
PublicationWłaściwości warstw chromowych zawierających różne ilości drobin WC zbadano metodą XPS, EPS oraz XRD. Metody te pozwoliły określić morfologię i skład chemiczny powłok. Właściwości antykorozyjne określono dla różnych czasów ekspozycji próbek w elektrolicie zawierającym 0,01 mol L-1 za pomocą metody woltamperometrycznej oraz spektroskopii impedancyjnej. Badania wykazały, że obecność WC w warstwach chromowych otrzymanych z kąpieli...
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Status report on high temperature fuel cells in Poland – Recent advances and achievements
PublicationThe paper presents recent advances in Poland in the field of high temperature fuel cells. The achievements in the materials development, manufacturing of advanced cells, new fabrication techniques, modified electrodes and electrolytes and applications are presented. The work of the Polish teams active in the field of solid oxide fuel cells (SOFC) and molten carbonate fuel cell (MCFC) is presented and discussed. The review is oriented...
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Determination of the Diffusion Coefficient of Lithium Ions in Graphite Coated with Polymer-Derived SiCN Ceramic
PublicationPraca dotyczy wyznaczenia wsółczynnik adyfuzji jonów litu w materiale elektrodowym składającym się z grafitu pokrytego materiałem ceramicznym krzemo-azotkiem węgla (SiCN). Wartość współczynnika dyfuzji zmierzono elektrochemicznie technikami: woltamperometrii cyklicznej (CV), elektrochemicznej spektrodkopii impedancyjnej (EIS) oraz miareczkowania galwanostatycznego (GITT). Materiał otrzymano na drodze pirolizy mieszaniny grafit:polimer...
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Fiber - optic low-coherence tomography system for visualization of internal structure of ceramic materials
PublicationW artykule przedstawiono światłowodowy system dwuwymiarowej wizualizacji niejednorodnych struktur warstw ceramicznych. Omówiono projekt i fizyczną realizację układu wykorzystującego optyczną, niskokoherentną reflektometrię optyczną, która umożliwia niedestrukcyjne obrazowanie wewnętrznych struktur różnych materiałów. W pracy przedstawiono przykładowe wyniki pomiarów wewnętrznych warstw LSFO.
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Electrical measurements of the dewetting of metal thin films
Open Research DataIn situ observations of dewetting of thin films is very complicated. One of the method, that helps to observe it, could be electrical measurements. For experiments, thin gold, silver and gold-silver nanoalloy films were deposited by magnetron sputtering method. Films were deposited on a Corning glass substrates. Samples were measured by four point method...
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Tailoring Electro/Optical Properties of Transparent Boron-Doped Carbon Nanowalls Grown on Quartz
PublicationCarbon nanowalls (CNWs) have attracted much attention for numerous applications in electrical devices because of their peculiar structural characteristics. However, it is possible to set synthesis parameters to vary the electrical and optical properties of such CNWs. In this paper, we demonstrate the direct growth of highly transparent boron-doped nanowalls (B-CNWs) on optical grade fused quartz. The effect of growth temperature...
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The harmonic distortion of voltage waveforms in the ship's electrical power system
Open Research DataThe dataset is a part of the research results on the quality of supply voltage on bus bars of the ship's electrical power system's main switchboard in different states of ship exploitation. The attached dataset contains the results of a harmonic distortion analysis expressed by the total harmonic distortion (THD) coefficient of voltage waveforms recorded...
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Study of the chemical state of Gd in a Ba-La-Gd-Co based ceramic
Open Research DataBarium, Lanthanum, Gadolinium and Cobaltium precursors were used for production of ceramic materials. Samples were produced by standard solid state reaction. Samples were annealed at 300 Celsius degree in wet and dry atmosphere. Annealing takes 72h or 2h. Results of annealing on a Gadolinum were observed by X-Ray photoemission spectroscopy (XPS), OmicronNanotechnology....
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Annealing Rate as a Crucial Parameter Controlling the Photoelectrochemical Properties of AuCu Mosaic Core–Shell Nanoparticles
PublicationThermal processing is an essential step during the synthesis of various metal nanostructures and for tailoring their morphology, optical, and electrochemical properties. Herein, a profound impact of the annealing rate and time on photoactivity of gold–copper nanostructures by changes in the position and alignment of energy levels and surface states is reported. AuCu nanoparticles (NPs) are fabricated by sputtering of thin metal...
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Naphthyl-vs. anthrylpyridine-2,6-dicarboxamides in cation binding studies. Synthesis and spectroscopic properties
PublicationPyridine-2,6-carboxamides bearing - or -naphthyl- and - or -anthryl- residues were prepared using simple method from pyridine-2,6-carboxylic acid dichloride and the respective aromatic amines. For the obtained receptors selective binding of lead(II), and copper(II) was found. Ion-receptor interactions were studied using UV-vis spectroscopy, spectrofluorimetry, 1H NMR, and FTIR spectroscopy. The reversible lead(II) and copper(II)...
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Electrical conductivity relaxation measurements - oxidation and reduction of BaCe0.6Zr0.2Y0.1Tb0.1O3-δ
Open Research DataThe dataset consists of 2 main catalogs: measurements performed for oxidation/reduction in dry conditions and in humid conditions. For Electrical Conductivity Relaxation (ECR) measurements, platinum reversible electrodes were applied in a four-probe arrangement and the sample was measured in the ProboStat™ measurement system. The ECR measurements were...
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Magnetotransport Properties of Semi-Metallic Bismuth Thin Films for Flexible Sensor Applications
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FTIR spectra of reference SOFC fueled by H2 and 20ppm H2S/biogas mixture at 750 C - cyclic measurements (12h per cycle)
Open Research DataThe dataset contains the FTIR spectra collected during the cyclic measurements of H2S poisoning in DIR-SOFC without LSCNT layer. The H2S poisoning and H2 regenrating cycles were 12 h each. The spectra were collected every 10 min.
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Flame retardant epoxy/halloysite nanotubes nanocomposite coatings: Exploring low-concentration threshold for flammability compared to expandable graphite as superior fire retardant
PublicationEpoxy nanocomposites containing halloysite nanotubes (HNTs) were developed and their low-concentration thresholds for thermal stability and flame retardancy were compared with that of epoxy system containing expandable graphite (EG), as a reference with superior flame retardancy. The effects of HNTs and EG on the peak of Heat Release Rate (pHRR), Total Heat Release (THR), and Time-To-Ignition (TTI) of the prepared samples were...
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Badania kompozytów na bazie niestechiometrycznego tytanianu strontu Sr1-xTi0,98Nb0,02O3-YSZ jako potencjalnej anody dla SOFC
PublicationW celu uzyskania jak najwyższej przewodności elektrycznej oraz ograniczenia procesu dyfuzji strontu do warstw sąsiadujących wytworzono tytanian strontu domieszkowany niobem z niedoborem strontu do 9% molowych. Następnie materiał ten zastosowano jako składnik przewodzący elektronowo w kompozytach z tlenkiem cyrkonu stabilizowanego tlenkiem itru (YSZ). Kompozyty scharakteryzowano pod względem właściwości istotnych z punktu widzenia...
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Maciej Wróbel dr inż.
PeopleReceived PhD from Gdańsk University of Technology in 2019. Research interests involve non-invasive applications of Raman spectroscopy for tissue analysis, specifically blood parameters measurements. Tissue mimicking phantoms, measurement of optical properties (scattering, absorption), as well as other optical sensing methods. Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS) utilized for measurements of biological...
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Potential of nanocomposites of zero valent copper and magnetite with Eleocharis dulcis biochar for packed column and batch scale removal of Congo red dye
PublicationThe current study is the first attempt to prepare nanocomposites of Eleocharis dulcis biochar (EDB) with nano zero-valent Copper (nZVCu/EDB) and magnetite nanoparticles (MNPs/EDB) for batch and column scale sequestration of Congo Red dye (CR) from synthetic and natural water. The adsorbents were characterized with advanced analytical techniques. The impact of EDB, MNPs/EDB and nZVCu/EDB dosage (1–4 g/L), pH (4–10), initial concentration...
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Impedance measurements of coating properties on bridge structures
PublicationPomiary impedancyjne pozwalają na prostą ocenę właściwości ochronnych powłok ochronnych i wykładzin. Pomiary stosuje się w celu porównania powłok, monitorowania ich właściwości i oceny mechanizmu działania. Metodyka jest z powodzeniem stosowana w pomiarach laboratoryjnych. Pomiary terenowe są bardziej skomplikowane ponieważ wymagają w pełni kontrolowanych komputerowo przyrządów, kontroli warunków pogodowych oraz wielu innych parametrów...
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Experimental and numerical study of thermal and electrical potential of BIPV/T collector in the form of air-cooled photovoltaic roof tile
PublicationAmong renewable energy sources, Building-Integrated Photovoltaic/Thermal (BIPV/T) systems are gaining increasing interest. To improve their economic competitiveness, technologies that increase their efficiency are searched for. The paper is devoted to evaluating the impact of various air-cooling configurations on the thermal and electrical performance of a photovoltaic roof tile. A numerical model of the own experimental system...
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Studies on the complex formation between lactams and thiolactams of sparteine with copper(II) cation
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Intensification of luminescence of Europium-EDTA complex in polyvinyl pyrrolidone films by copper nanoparticles
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New Dinuclear Macrocyclic Copper(II) Complexes as Potentially Fluorescent and Magnetic Materials
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Bromidotetrakis(1H-2-ethyl-5-methylimidazole-κN3)copper(II) bromide
PublicationAtom Cu(II) w tytułowym kompleksie jest skoordynowany przez cztery atomy N obojętnych cząsteczek imidazolu oraz jon bromkowy. Jon kompleksowy ma geometrię piramidy kwadratowej. Kationy kompleksowe w krysztale tworzą układ dipoli ułożonych ''głowa do ogona'' równolegle do osi c.
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The mixed EIS-EQCM method for investigation of electrodeposition and electrodissolution of copper in acidic solution
PublicationCelem pracy jest połączenie chronowoltimpedancjometrii i mikrograwimetrii dobadania procesu elektroosadzania i elektroredukcji miedzi w środowisku kwaśnym. Proces elektroosadzania i elektroredukcji miedzi w środowisku kwaśnym został wybrany jako przykład prostej reakcji elektrochemicznej, by sprawdzić wiarygodność metody. Przedstawiono nową, obiecującą technikę - EIS-EQCM - jako metodę badania procesów niestacjonarnych, przebiegających...
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Copper defects and conductivity in Bi-Pb-Sr-Ca-Cu-O glasses.
Publication(Bi0.8Pb0.2) 4Sr3Ca3Cu4Ox częściowo skrystalizowane próbki otrzymano poprzez wygrzewanie szkła w wysokiej temperaturze. Badano je metodą EPR w zakresie temperatur od 4K do 300K. Koncentracja paramagnetycznych centrów Cu2+ zmniejsza się wraz ze wzrostem przewodnictwa elektrycznego i znika po skrystalizowaniu faz nadprzewodzących.
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Degradation of electrical performance of a crystalline photovoltaic module due to dust deposition in northern Poland
PublicationThe reduction in power output caused by the accumulation of dust on the photovoltaic module surface is an important problem and should receive much more attention in the literature. This study was an evaluation of the performance degradation of crystalline photovoltaic modules due to natural and simulated dust deposition. Dust is created from powdered grains of sand and particles of different bodies. Dust originates from different...
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Influence of Surface-Modified Montmorillonite Clays on the Properties of Elastomeric Thin Layer Nanocomposites
PublicationIn recent years, polyurethane nanocomposites have attracted more attention due to the massive demand for materials with increasingly exceptional mechanical, optical, electrical, and thermal properties. As nanofillers have a high surface area, the interaction between the nanofiller and the polymer matrix is an essential issue for these materials. The main aim of this study is to validate the impact of the montmorillonite nanofiller...