Wyniki wyszukiwania dla: STATE BROADCAS TING

• Application of Syntactic Pattern Recognition Approach in Design and Optimisation of Group Machining Systems

  Publikacja

  • M. Siemiatkowski

  - Solid State Phenomena - Rok 2010

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• Composite (La, Sr)MnO3-YSZ cathode for SOFC

  Publikacja

  • T. Suzuki
  • M. Awano
  • P. Jasiński
  • V. Petrovsky
  • H. U. Anderson

  - SOLID STATE IONICS - Rok 2006

  W pracy przedstawiono właściwości elektryczne kompozytów (La,Sr)MnO3-YSZ. Materiały te dzieki swoim włąściwościom mogą staniwć dobry materiał na katody ogniw paliwowych. Przedstawiono też wyniki badań ogniwa paliwowego pracującego z paliwem wodorowym zbudowanego na bazie katody z kompozytu LSM-YSZ i anody Ni-YSZ. Uzyskano gęstośc mocy 0.26 W cm−2 przy temperaturze 850°C.

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• Electrical properties of nanocrystalline Sm-doped ceria ceramics

  Publikacja

  • P. Jasiński

  - SOLID STATE IONICS - Rok 2006

  Właściwości ceramiki z cerii zależa zwykle silnie od struktury ziaren. W pracy przedstawiono właściwości elektryczne ceramiki z cerii domieszkowanej samarem wykonanje w technologii 'net shape' posiadającej strukturę nanokrystaliczną.

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• Transport of alkali metal cations in poly(3,4-ethylenethiophene) films.

  Publikacja

  • A. Lisowska-Oleksiak
  • A. Kupniewska

  - SOLID STATE IONICS - Rok 2003

  Elektrochemicznie otrzymana warstwa kompozytowa złożona z poli(3,4-etyleno-dioksytiofenu) i poli(styrenosulfonianu) podczas polaryzacji ulega odwracalnemu procesowi sorpcji-desorpcji kationów z elektrolitu zewnętrznego. Transportowi jonowemu towarzyszą cząsteczki wody (rozpuszczalnika). Ilość cząsteczek wody przypadająca na jednostkowy kation metali alkalicznych została wyznaczona za pomocą metody elektrochemicznej mikrowagi...

• Mixed ionic polaron transport and rapid crystallization in (Bi, Pb)-Sr-Ca-Cu-O glass.

  Publikacja

  • R. J. Barczyński
  • M. Gazda
  • L. Murawski

  - SOLID STATE IONICS - Rok 2003

  Przedstawiono rezultaty pomiarów zmiennoprądowego przewodnictwa elektrycznego w szkłach (Bi,Pb)-Sr-Ca-Cu-O. Zaobserwowano dwa mechanizmy przewodnictwa.Zaproponowano hopping małych polaronów i dyfuzję jonów Cu(I) jako mechanizmy przewodnictwa.

• Ionic conductivity of bismuth silicate and bismuth germanate glasses.

  Publikacja

  • B. Kusz
  • K. Trzebiatowski
  • R. J. Barczyński

  - SOLID STATE IONICS - Rok 2003

  Przedstawiono wyniki badań przewodnictwa d.c i a.c. szkieł BixGe1-xO2-0.5x (gdzie x=0.13, 0.23, 0.33, 0.47) i BixSi1-xO2-0.5x (gdzie x=0.47, 0.57, 0.67). Wyniki sugerują, że przewodnictwo elektryczne jest zdeterminowane ruchem jonów tlenu. Znaczący wzrost przewodnictwa elektrycznego przy x> 0.33 został wytłumaczony na podstawie faz perkolacyjnego modelu ruchu jonów w podsieci BiO5-6.

• Electronic conductivity in Na2O-FeO-P2O5 glasses. oz.

  Publikacja

  • L. Murawski
  • R. J. Barczyński
  • D. Samatowicz

  - SOLID STATE IONICS - Rok 2003

  Zbadano przewodnictwo stałe i zmiennoprądowe w szkłach: 50P2O5-(50-x)FeO-xNa2O i 50P2O5-(50-x)FeO-xCaO, gdzie x zmieniano od 7 do 20mol%. Wykazano,że zamiana CaO na Na2O w małym stopniu zmienia przewodnictwo elektryczne szkieł, co sugeruje, że przewodnictwo w szkłach zawierających Na2O ma charakter elektronowy. Do badania procesów migracji elektronów i jonów zastosowano metodę tarcia wewnętrznego. W widmie tarcia wewnętrznego...

• Structural and electrical transport studies of reduced in hydrogen surfaceof bismuth germanate glass

  Publikacja

  • B. Kusz

  - SOLID STATE COMMUNICATIONS - Rok 2003

  Otrzymano nanostruktury krystalicznego bizmutu w matrycy szkła germanowegooraz warstwę nanostruktur krystalicznego bizmutu na powierzchni redukowanegow atmosferze wodoru szkła Bi0.33Ge0.67O1.83. Zaproponowano prosty model bu-dowy zredukowanych szkieł bizmutowo-germanowych potwierdzony wynikami badańAFM i XRD. Zbadano wpływ czasu i temperatury redukcji oraz topnienia bizmu-tu na własności elektryczne badanych szkieł. Przeanalizowano...

• Chemical instability of the cobalt oxyhydrate superconductor under ambientconditions.

  Publikacja

  • M. L. Foo
  • R. Schaak
  • V. L. Miller
  • T. Klimczuk
  • N. Rogado
  • Y. Wang
  • G. Lau
  • C. Craley
  • H. Zandbergen
  • N. Ong

  - SOLID STATE COMMUNICATIONS - Rok 2003

  Przedstawiono badania dyfrakcyjne i termograwimetryczne uwodnionego, sodowo-kobaltowego tlenku nadprzewodzącego: NaxCoO2 yH2O (y=1.4). Materiał ten jest niestabilny już w temperaturze pokojowej i przechodzi w nowo odkrytą fazę = 0.6.

• Modelling of the Heat Flux Density Distribution for Laser Beam Welding

  Publikacja

  • A. Marmołowski
  • W. Kiełczyński

  - Solid State Phenomena - Rok 2011

  Great interest of the laser beam welding in industry is a new theoretical task, making planning the welding procedure specification and the quality control of welded joints easier. Estimating and calculating the dimensions of a weld pool and temperature distribution near weld mainly concern heat source modelling. In the presented work calculations of welding pool shape and thermal field for cylindrical-powered-normally model of...

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• Formation of Porous Structure of the Metallic Materials Used on Bone Implants

  Publikacja

  • T. Seramak
  • W. Serbiński
  • A. Zieliński

  - Solid State Phenomena - Rok 2012

  Research on improvement of structure and fabrication methods of the bone implants are carried out for many years. Research are aimed to shape the structures, that will have a Young's modulus value similar to the value of the human bones Young's modulus. Depending on theporosity, Young's moduli can even be tailored to match the modulus of bone closer than solid metals can, thus reducing the problems associated with stress shielding...

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• Oxidation Time Influence on the Structure of the Cobalt Base Clad Layer and Scale Morphology

  Publikacja

  • H. Smoleńska

  - Solid State Phenomena - Rok 2012

  Zbadano wpływ czasu utleniania na mikrosrukutręi własności mechaniczne a w szczególności mikrotwardość, warstw wykonanych ze stopu kobaltu.Warstwy były wykonane za pomocą napawania plazmowego (PTA). Stop kobaltu podlegał utlenianiu w powietrzu w temperaturze 800 topni celsjusza w czasie 1, 22 i 200 godzin. w wyniku utleniania nastapiło uformowanie warstw zgorzeliny oraz nastapiły zmiany w mikrostrukturze. Zaobserwowano także zmiany...

• Wear and corrosion characteristics of the layers type (mn-p) formed on aluminium alloys

  Publikacja

  • W. Serbiński
  • T. Wierzchoń

  - Solid State Phenomena - Rok 2012

  opisano multipleksową metodę wytwarzania warstw zawierających mangan i fosfor (mn-p) na stopach aluminium. przedstawiono wyniki badań mikrostruktury, właściwości tribologicznych i korozyjnych tych warstw. stwierdzono obecność tlenku manganu i fosforku manganu w wytworzonych warstwach oraz ich wysoką twardość, rzędu 1272 hv0,02. warstwy typu (mn-p) zmniejszają podatność stopu alsi13mg1cuni na korozję w 0,01 mh2so4.

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• Indoor atmospheric degradation of historical metal objects studied by spectroscopic techniques

  Publikacja

  • I. Żmuda-Trzebiatowska
  • A. Fietkiewicz
  • G. Śliwiński

  - Solid State Phenomena - Rok 2012

• Perovskites in Solid Oxide Fuel Cells

  Publikacja

  • M. Gazda
  • P. Jasiński
  • B. Kusz
  • B. Bochentyn
  • K. Gdula-Kasica
  • T. Lendze
  • W. LEWANDOWSKA-Iwaniak
  • A. D. Mielewczyk-Gryń
  • S. Molin

  - Solid State Phenomena - Rok 2012

  Przeglądowa publikacja dotycząca wykorzystania ceramicznych materiałów perowskitowych w tlenkowych ogniwach paliwowych.

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• Preparation and characterization of TiO2 nanostructures for catalytic CO2 photoconversion

  Publikacja

  • A. Iwulska
  • G. Śliwiński

  - Solid State Phenomena - Rok 2012

  The titanium dioxide target (99.7%) of 1 cm in dia was ablated in vacuum by laser pulses(6 ns) at 266 nm and at repetition rate of 10 Hz. During deposition the laser fluence between 1 and 3.5 J/cm2 and the O2 pressure from the range of 10-2 - 1 Pa were applied. The thin TiO2 films were deposited on glass substrate (1 × 1 cm2) heated up to 500 °C. The chemical composition of the film and samples produced by annealing were investigated...

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• Solid oxide fuel cells with Ni-infiltrated perovskite anode

  Publikacja

  • J. Karczewski
  • B. Bochentyn
  • S. Molin
  • M. Gazda
  • P. Jasiński
  • B. Kusz

  - SOLID STATE IONICS - Rok 2012

  Wytworzono próbki na bazie tytanianu strontu domieszkowanego niobem i przebadano wpływ nasączania niklem na właściwości tych materiałów.

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• Influence of spatial structures of 316L stainless steel on its cavitation erosion resistance

  Publikacja

  • B. Śniegocka
  • M. Szkodo
  • J. Chmiel

  - Solid State Phenomena - Rok 2012

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• Donor-substituted SrTi1+xO3−δ anodes for SOFC

  Publikacja

  • B. Bochentyn
  • J. Karczewski
  • T. Miruszewski
  • A. Krupa
  • M. Gazda
  • P. Jasiński
  • B. Kusz

  - SOLID STATE IONICS - Rok 2012

  Przebadano wpływ niestechiometrii na właściwości tytanianu strontu domieszkowanego niobem. Zaproponowano chemię defektów dla tego typu związków.

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• Electrochemical activity and characterization of hybrid material consisted of poly(3,4- ethylenedioxythiophene) and silver hexacyanocobaltate

  Publikacja

  • A. Nowak
  • A. Lisowska-Oleksiak
  • J. Chojnacki

  - SOLID STATE IONICS - Rok 2012

  Prac przedstawiono charakterystykę elektrochemiczną oraz powierzchniową materiału hybrydowego składającego się z polimeru przewodzącego, poli(3,4-etylenodioksytiofenu) oraz nieorganicznej sieci typu redoks, heksacyjanokobaltanu srebra. Materiał scharakteryzowano technikami jak AFM, SEM. Skład materiału oznaczono za pomocą mikroanalizy rentgenowskiej EDX. Analiza potwierdziła obecność sieci nieorganicznej w materiale. Proporcja...

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• Optimization of microstructure and properties of acceptor-doped barium cerate

  Publikacja

  • K. Gdula-Kasica
  • A. D. Mielewczyk-Gryń
  • S. Molin
  • P. Jasiński
  • A. Krupa
  • B. Kusz
  • M. Gazda

  - SOLID STATE IONICS - Rok 2012

  The presented research concerns acceptor doped barium cerate and the attempts of improvement of its production method that would allow obtaining the solid electrolyte characterized by the particular properties. The authors suggest combining two production methods, molten salt synthesis and self-combustion, in order to achieve the compound material that has some of the advantages of both of the initial methods. An impact of nickel...

• Redundantly Actuated 3RRR Parallel Planar Manipulator - Numerical Analyses of its Dynamics Sensitivity on Modifications of its Platform’s Inertia Parameters

  Publikacja

  • K. Lipiński

  - Solid State Phenomena - Rok 2013

  In the paper, numerical analyses, as well as dynamics of a complex mechanism, are presented. Two objectives are crucial for the paper: inverse dynamic model is needed (dedicated to be use in the model predictive controller); an identification method is searched (some trajectory parameters are controlled, when specific trajectory is tracked under an open-loop model-based control), as selected parameters must be identified for the...

• Comparison of Single and Multi-Population Evolutionary Algorithm for Path Planning in Navigation Situation

  Publikacja

  • Ł. Kuczkowski
  • R. Śmierzchalski

  - Solid State Phenomena - Rok 2014

  In this paper a comparison of single and multi-population evolutionary algorithm is presented. Tested algorithms are used to determine close to optimal ship paths in collision avoidance situation. For this purpose a path planning problem is defined. A specific structure of the individual path and fitness function is presented. Principle of operation of single-population and multi-population evolutionary algorithm is described....

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• Wear of Electroplated Tools Used for Flat Grinding of Ceramics

  Publikacja

  • M. Deja

  - Solid State Phenomena - Rok 2013

  Two methods for the abrasive properties evaluation, based on the image processing, are presented in the paper. Image processing analysis was developed to evaluate quickly the abrasive properties as the tool wears down. The coefficient based on the image brightness was calculated and additional analysis was based on the number of grains located on the active surface of the tool before and after machining. The active surfaces of...

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• SmallAngle Neutron Scattering Study of the Structure of Mixed Micellar Solutions Based on Nonionic and Two Cationic Surfactants

  Publikacja

  • A. Rajewska
  • K. Mędrzycka
  • E. Hallmann

  - PHYSICS OF THE SOLID STATE - Rok 2014

  The aggregation in mixed water systems based on nonionic surfactant, i.e., heptaethylene glycol monotetradecyl ether (C14E7), and cationic surfactants, i.e., cetyltrimethylammonium bromide (CTAB), and cetyltrimethylammonium chloride (CTAC) has been investigated using the smallangle neutron scattering method. The preliminary results of the study of the behavior of C14E7 aqueous solutions (for a concentration of 0.17%) when adding...

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• Surface Structure of Components Created by Stereolitography

  Publikacja

  • S. Dzionk

  - Solid State Phenomena - Rok 2013

  Stereolithography is an additive rapid prototyping method. This method is based on the principle of solidifying a liquid photopolymer (resin) by laser radiation. Models obtained with this method are characterized by a specific surface structure called “stairstep effect”. It causes that, the surface should be processed by additional finishing (postprocessing). To minimize the additional machining process, the model should be set...

• Research on Tool Temperature Dependence on Lapping Grains Size

  Publikacja

  • J. Molenda
  • A. Charchalis
  • A. Barylski

  - Solid State Phenomena - Rok 2013

  Commonly used as a finishing operation, lapping has been used for achieving ultra-high finishes and close tolerances between mating pieces. Its carried out by applying loose abrasive grains between work and lap surfaces, and causing a relative motion between them resulting in a finish of multi-directional lay. The grains activity (sliding and rolling) in the working gap causes not only the material removal but also the temperature...

• Electrical properties of A-site Ca-doped LaNb1-xAsxO4-δ ceramics

  Publikacja

  • P. Winiarz
  • M. Gazda
  • A. Dawczak
  • S. L. Wachowski

  - SOLID STATE IONICS - Rok 2024

  The electrical properties of A-site Ca-doped LaNbO4 with the addition of As in the B-site, have been investigated. Total, grain- and specific grain boundary electric conductivities in different oxygen partial pressure, and water vapour partial pressure were determined. Additional conductivity measurements were performed in nitrogen, to suppress the possible p-type conductivity, focusing on protonic conductivity. The maximum measured...

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• Synthesis and structural properties of (Y, Sr)(Ti, Fe, Nb)O3−δ perovskite nanoparticles fabricated by modified polymer precursor method

  Publikacja

  • T. Miruszewski
  • P. Gdaniec
  • J. Karczewski
  • B. Bochentyn
  • K. Szaniawska
  • P. Kupracz
  • M. Prześniak-Welenc
  • B. Kusz

  - SOLID STATE SCIENCES - Rok 2016

  The yttrium, iron and niobium doped-SrTiO3 powders have been successfully fabricated by a modified low–temperature synthesis method from a polymer complex. The usage of strontium hydroxide precursor instead of conventional strontium nitrate or strontium carbonate provides to the possibility of significant decrease of annealing temperature. It allows to prepare a material with sphere-shape grains of nanometric size (15–70 nm). The...

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• Electronic and ionic relaxations in strontium-borate glass and glass-ceramics containing bismuth and vanadium oxides

  Publikacja

  • N. A. Wójcik
  • P. Kupracz
  • M. Prześniak-Welenc
  • J. Karczewski
  • M. Gazda
  • K. SiuzdaK
  • R. J. Barczyński

  - SOLID STATE IONICS - Rok 2015

  The topography, microstructure and electrical properties of strontium-borate glass and SBO glass containing bismuth and vanadium oxides, were studied. The structure was measured using X-ray diffraction (XRD), Energy Dispersive X-ray Spectrometer (EDS) and Scanning electron microscope (SEM) methods. The A.C. complex conductivity was investigated as a function of temperature and frequency. The influence of the quantity of bismuth...

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• The effect of pre-hydrogen charging on corrosion behaviour of superduplex stainless steel welded joints

  Publikacja

  • J. Łabanowski
  • A. Świerczyńska
  • J. Michalska

  - Solid State Phenomena - Rok 2015

  The paper presents results of research undertaken to determine the influence of hydrogen on passivity and corrosion resistance of 2507 super duplex stainless steel welded joints. Butt welded joints were made with low heat input using flux corded arc welding (FCAW) method. Coupons of 5.0 x 5.0 mm were cut from the welded joints containing weld metal (WM), heat affected zone (HAZ) and parent metal (PM). Hydrogen was introduced...

• Modeling and simulation of tool cycle in manufacturing cell

  Publikacja

  • M. Dobrzyński

  - Solid State Phenomena - Rok 2010

  The paper addresses issues concerning modeling and analysis of tool flow within a three-machine manufacturing cell used for small batch manufacturing of a definite spectrum of prismatic parts. The approach utilizes a method for job and tool allocation to work centers with limited number of machines and capacity of tool resources, based on the analysis of formalized relations: job - tool sets required. Selected tool flow control...

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• Optimum Control of Gyroscopic Systems

  Publikacja

  • R. Hein
  • C. Orlikowski

  - Solid State Phenomena - Rok 2010

  The problem of optimum control of transverse rotor vibrations with gyroscopic interactions has been described and solved in the paper. An integral performance index has been defined for such system in order to minimize vibration level of a chosen rotor point. For this reason, an efficient way of finding the weight coefficients of integral performance index for multi-degrees-of-freedom system with gyroscopic interactions has been...

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• Analysis of Ceramic Elements with Ring-Crack Defects in Lubricated Rolling Contact

  Publikacja

  • W. Karaszewski

  - Solid State Phenomena - Rok 2016

  The properties of ceramics, specifically low density, high hardness, high temperature capability and low coefficient of thermal expansion are of most interest to rolling element manufacturers. Surface ring cracks on lubricating rolling contact fatigue failure has been studied using numerical fracture analysis. Such cracks are very often found on ceramic bearing balls and decrease fatigue life rapidly. The numerical calculations...

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• Flexible dye-sensitized solar cells based on Ti/TiO2 nanotubes photoanode and Pt-free and TCO-free counter electrode system

  Publikacja

  • M. Klein
  • M. Szkoda
  • M. Sawczak
  • A. Cenian
  • A. Lisowska-Oleksiak
  • K. Siuzdak

  - SOLID STATE IONICS - Rok 2017

  Flexible dye-sensitized solar cells (DSSCs) are getting more attention compared to standard glass covered DSSCs due to their unique commercial applications (e.g. tents or sail surfaces) and the possibility of rolling up into a small, portable device. In this work, titania nanotubes (TiO2 NT) modified with titania nanoparticles (TiO2 NP) were photoelectrochemically characterized as an anode for flexible dye-sensitized solar cells....

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• Electrodes consisting of PEDOT modified by Prussian Blue analogues deposited onto titania nanotubes – Their highly improved capacitance

  Publikacja

  • M. Szkoda
  • K. Trzciński
  • J. Rysz
  • M. Gazda
  • K. Siuzdak
  • A. Lisowska-Oleksiak

  - SOLID STATE IONICS - Rok 2017

  In this work we present the outstanding energy storage of prepared inorganic-organic heterojunction where hydrogenated ordered titania nanotubes (H-TiO2NT) were modified by the hybrid made of poly(3,4-ethylenedioxythiophene) (pEDOT) and iron hexacyanoferrate centres (Fehcf, Prussian Blue). The material TiO2NT/pEDOT:Fechf was obtained electrochemically by means of: anodization, hydrogenation and finally, electropolymerization of...

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• Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte

  Publikacja

  • T. Kraia
  • S. L. Wachowski
  • E. Vollestad
  • R. Strandbakke
  • M. Konsolakis
  • T. Norby
  • G. Marnellos

  - SOLID STATE IONICS - Rok 2017

  The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the solid electrolyte. The impact of temperature (700–850 °C) and H2S concentration (0–1 v/v%) in steam-rich atmospheres (90 v/v% H2O) on the overall cell performance was thoroughly assessed by means of electrochemical...

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• Identification of Kinematic Excitation Function by the Modal Coordinates Estimation of the System's Dynamics

  Publikacja

  • K. J. Kaliński
  • M. Mazur

  - Solid State Phenomena - Rok 2016

  The paper presents a method of the kinematic excitation courses’ identification in excitation points, based on the car road test acceleration at different measurement points. For the purpose of the laboratory fatigue life investigation of contemporary complex structures (e.g. cars bodies) and components of these structures (i.e. cars roofs), only a few first vibration modes are usually taken into account. During real life tests...

• CGO as a barrier layer between LSCF electrodes and YSZ electrolyte fabricated by spray pyrolysis for solid oxide fuel cells

  Publikacja

  • D. Grudzień
  • J. Karczewski
  • A. Chrzan
  • P. Jasiński

  - SOLID STATE IONICS - Rok 2016

  Perovskite La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) is often used as a cathode material for solid oxide fuel cells (SOFC) due to high mixed ionic and electronic conductivity and good catalytic activity. Unfortunately, sintering of the LSCF cathode together with the yttria stabilized zirconia (YSZ) electrolyte, leads to formation of the La2Zr2O7 and SrZrO3 phases in the interface. These phases increase the resistance of the cell. To avoid...

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• Structure and electrical properties of Y, Fe-based perovskite mixed conducting composites fabricated by a modified polymer precursor method

  Publikacja

  • T. Miruszewski
  • P. Gdaniec
  • W. Rosiński
  • J. Karczewski
  • B. Bochentyn
  • B. Kusz

  - SOLID STATE SCIENCES - Rok 2017

  In this work, samples of Y0.07Sr0.93Ti1-xFexO3-d with 20, 40, 60 and 80 mol% of iron amount were prepared by a low-temperature polymer precursor method. The SEM-EDS analysis proved that analyzed Y0.07Sr0.93Ti1-xFexO3-d samples were composites of two Ti- and Fe-rich perovskite samples. This kind of composite consists of two phases in which one has a good ionic and the other electronic conductivity, which makes such a composite a...

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• Preparation and photocatalytic properties of BaZrO 3 and SrZrO 3 modified with Cu 2 O/Bi 2 O 3 quantum dots

  Publikacja

  • M. Miodyńska
  • B. Bajorowicz
  • P. Mazierski
  • W. Lisowski
  • T. Klimczuk
  • M. J. Winiarski
  • A. Zaleska-Medynska
  • J. Nadolna

  - SOLID STATE SCIENCES - Rok 2017

  In this study, we report a novel method of BaZrO3 and SrZrO3 surface modification by two different types of quantum dots (QDs, Cu2O and Bi2O3), which improved the photocatalytic performance of the obtained materials under UV-Vis light irradiation. Pristine BaZrO3 and SrZrO3 were prepared by the hydrothermal method. The deposition of Cu2O- and Bi2O3-QDs was carried out by chemical reduction. The morphology of the nanoparticles was...

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• Structure and thermoelectric properties of Cs-Bi-Te alloys fabricated by different routes of reduction of oxide reagents

  Publikacja

  • N. Gostkowska
  • T. Miruszewski
  • B. J. Trawiński
  • B. Bochentyn
  • B. Kusz

  - SOLID STATE SCIENCES - Rok 2017

  Cesium-bismuth-telluride polycrystalline materials were fabricated using a cost-effective method based on a reduction of oxide reagents, leading to a production of a material with good thermoelectric properties. Several samples with various initial stoichiometry were prepared by melting of oxide powders at 1050 °C, quenching, milling to powders and then reducing in pure hydrogen at 400 °C. Another concept was to obtain the CsBi4Te6...

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• Nonlinear electrical properties of glass-ceramics nanocomposites containing ferroelectric nanocrystallites of Bi2VO5.5

  Publikacja

  • N. A. Wójcik
  • P. Kupracz
  • R. J. Barczyński

  - SOLID STATE IONICS - Rok 2018

  Nonlinear A.C. impedance measurements were conducted in the 50BiV-50SrBAlO nanocomposite as a function of frequency, temperature and A.C. voltage. This material is ferroelectric below temperature of 730 K, and above 730 K is a good ion-conductor. For this nanocomposite a low A.C. voltage of 1 V rms is enough to observe high nonlinearities. The origin of these nonlinear effects depends on the temperature and frequency. In the high...

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• The domination of ionic conductivity in tetragonal phase of the organometal halide perovskite CH3NH3PbI3-xClx

  Publikacja

  • D. Głowienka
  • T. Miruszewski
  • J. Szmytkowski

  - SOLID STATE SCIENCES - Rok 2018

  Organometal trihalide perovskites have recently gained extreme attention due to their high solar energy conversion in photovoltaic cells. Here, we investigate the contribution of iodide ions to a total conductivity of the mixed lead halide perovskite CH3NH3PbI3−xClx with a use of the modified DC Hebb–Wagner polarization method. It has been identified that an ionic conductivity dominates in tetragonal phase which is associated with room...

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• Synthesis and properties of porous Sr 0.96 Y 0.04 Ti 1−x Nb x O 3

  Publikacja

  • E. Drożdż
  • J. Karczewski

  - SOLID STATE IONICS - Rok 2018

  A series of porous, single phase Sr0.96Y0.04Ti1-xNbxO3 samples was obtained using a wet synthesis method (modified citrate sol-gel) method. Temperature-programmed reduction (TPR) and temperature-programmed oxidation (TPO) measurements have shown high stability of the obtained material in variable (oxidizing/reducing) atmospheres. All samples exhibit high conductivity in hydrogen atmosphere with the highest value (around 1S/cm)...

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• Electrical properties of Na2O-CaO-P2O5 glasses doped with SiO2 and Si3N4

  Publikacja

  • N. A. Wójcik
  • B. Jonson
  • R. J. Barczyński
  • P. Kupracz
  • D. Möncke
  • S. Ali

  - SOLID STATE IONICS - Rok 2018

  Sodium-calcium-phosphate glasses doped with SiO2 or Si3N4 having similar sodium ion concentrations were prepared by melt quenching. The conductivity was measured by impedance spectroscopy under nitrogen atmosphere in a wide frequency range (10 mHz–1 MHz) and wide temperature range (153–473 K). At 36.6 °C, DC conductivities of all glasses vary between 1.1 ∗ 10−12 and 8.9 ∗ 10−12 S cm−1 and have similar activation energies (between...

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• Photoelectrochemical properties of BIMEVOX (ME=Cu, Zn, Mn) electrodes in contact with aqueous electrolyte

  Publikacja

  • K. Trzciński
  • A. Borowska-Centkowska
  • M. Sawczak
  • A. Lisowska-Oleksiak

  - SOLID STATE IONICS - Rok 2015

  Layered oxide Bi4O2O11 and mixed oxides of bismuth, vanadium and a third metal (ME = Cu, Zn, Mn) were synthesized and characterized using XRD, Raman and SEM. The energy band gap (Eg) of samples determined using UV–VIS reflectance spectra equals to 2.46, 2.34, 2.27 and 2.18 eV for Bi4V2O11, BICUVOX (Bi2V1 − xCuxO5.5 − 3x/2), BIZNVOX (Bi2V1 − xZnxO5.5 − 3x/2) and BIMNVOX (Bi2V1 − xMnxO5.5 − x/2) (x = 0.1), respectively. Open circuit...

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• Investigation of catalytic layers on anode for solid oxide fuel cells operating with synthetic biogas

  Publikacja

  • D. Grudzień
  • J. Karczewski
  • B. Bochentyn
  • A. Chrzan
  • M. Gazda
  • P. Jasiński

  - SOLID STATE IONICS - Rok 2015

  In this paper solid oxide fuel cells operating with dry synthetic biogas have been examined. In order to increase their stability the layers of CuO-CeO2, Cu1.3Mn1.7O4 and Y0.08Sr0.92Ti0.8Fe0.2O3 -δ have been deposited on the Ni-YSZ anode site. These layers should catalyze the internal biogas reforming and prevent the carbon deposition on the anode site. It has been found that CuO-CeO2 and Cu1.3Mn1.7O4 catalysts led to an increase...

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• The Influence of Modelling Material Zones on Strains and Stresses at Weld Toe Notch

  Publikacja

  • K. Niklas
  • J. Kozak

  - Solid State Phenomena - Rok 2015

  The latest development in the field of welding technology enabled prefabrication of thin-walled sandwich structures in an industrial scale. Sandwich structures fabricated of steel, or aluminium alloy plates and stiffeners are welded with the use of hi-power CO2 lasers. Strength analysis of such structures with the use of finite element method needs proper material modelling.In this paper the material model of steel sandwich panel...

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• Influence of type of material on performance of hydraulic components in thermal shock conditions

  Publikacja

  • R. Jasiński

  - Solid State Phenomena - Rok 2012

  During the start-up of a hydraulic system in low ambient temperatures an incorrect operation may occur. The principles and conditions of safely operating hydraulic driven machines and devices are essential to designers and operators. For this reason the author of this article has conducted a series of tests on hydraulic components and systems in thermal shock conditions (cooled-down components were supplied with hot working medium)....