Wrocław, Poland
Wrocław, Poland

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In the paper is presented a comparison of physical parameters of alumina template made by use of one (simplified) and two-step anodisation. The analyze was taken on the electrical parameters of anodisation circuits of both of the technologies and the visualization of surface was carried on by means of FE-SEM microscope.


At present the three basic directions of research on the development of organic photovoltaics are: (i) synthesis of new polymers and small-molecular compounds in an active layer of solar cells, (ii) modification of the architecture of solar cells and (iii) perfecting of methods of processing of' each of the layers of solar cell. The highest value of the power conversion efficiency being obtained in IEL Wrocław reaches the level of 2.4% for the bulk heterojunction polymer solar cell.


The paper is a literature review concerning polymer fuel cells. In the first part the structure, principle of operation and types of fuel cells (FC) are discussed. In-situ techniques used for evaluation of FC parameters in a single cell or assembled stacks, such as current-voltage characteristics (polarization curve), current interruption method, cyclic and linear sweep voltammetry, electrochemical impedance spectroscopy, cathode discharge and current mapping are presented. The mechanism of operation and functions of fuel cell components are discussed in details using the example of PEMFC (Polymer Electrolyte Membrane or Proton Exchange Membrane fuel cells). Two types of PEMFC are distinguished, i.e. HT (High Temperature) and LT (Low Temperature) indicating the advantages of high-temperature operation. The second part of this review is related to different kinds of polymers used in fuel cells and describes practical applications of polymer fuel cells.


Low-d. polyethylene was reinforced with com. modified nanosize montmorillonite (5% by mass) by extrusion and pressed to test samples studied for structure and dielec. properties. The elec. resistivity of the composites was lower while the loss tangent was higher than those of original polyethylene.


Zylka P.,Wroclaw University of Technology | Moron L.,Instytut Elektrotechniki
Przeglad Elektrotechniczny | Year: 2010

The paper discusses current state of research related to polymeric dielectric materials in which surface displays biomorphic characteristics i.e. it imitates - desirable from scientific and technological point of view - features of living organisms or natural materials. Special attention is paid to superhydrophobic materials displaying "lotus effect". The concise literature review is illustrated with results of experiments aimed at obtaining (by means of acrylic model replica method) HTV silicone rubber with surface displaying "lotus effect".


The subject of this invention is a method of synthesis of of hybrid compounds of polyaniline and application of hybrid compounds of polyaniline. The method consists in that to an ice water cooled acid solution, selected from the group of orthophosphoric acids of a concentration of 0.1 - 6 M, or hydrochloric, hydrofluoric, nitric and sulfuric acid of a concentration 0.1 - 8 M, containing an oxidizer in a form of dissolved ammonium persulfate (NH_(4))_(2)S_(2)O_(8) in the amount of 10.0 - 20.0 g and 5.0 - 20.0 g of ammonium heptamolybdate tetrahydrate (NH_(4))_(6)Mo_(7)O_(24)x_(4)H_(2)O), 5.11 g of aniline is added, whereby the cooled solution is stirred for at least 1 hour, and then left for at least 4 hours at an ambient temperature, and after sedimentation the dark-green precipitate of polyaniline heptarilolybdate is filtered, thoroughly rinsed with distilled water until the filtrate is colorless and finally dried at 378 K for at least 8 hours. Application consists in that the polyaniline heptamolybdates, added in the amount of 0.1 to 5 mass %, play a role of inhibitors, enhancing corrosion resistance of coatings made from epoxy resins, water soluble polyvinyl, acryl and alkyd epoxy paints, and paints dissolved in two-component solvents.


The subject of this invention is a method of manufacturing of an electrode oxide material, the electrode oxide material and the applications of the electrode oxide material intended for electrodes of supercapacitors of MeO type, made by magnetron sputtering method. The method consists in that inside a working chamber at least one metal current collector or a metal current collector coated with a carbon layer with a developed surface is placed and the surface of the current collector is positioned at a distance of 50 mm - 120 mm from the target made of the sputtered metal, where at a reactive gas atmosphere at the pressure of 0.4 Pa to 2.0 Pa and the power of 0.5 kW to 2.0 kW dissipated in the target, a thin metal electrode from a metal oxide (Me)_(x)O_(n-x), with the thickness of 20 nm to 500 nm is deposited, whereby the deposited oxide layer is porous and has a developed surface. The electrode oxide material is a porous layer of metal oxide (Me)_(x)O_(n-x), with highly developed surface, porosity above 40% and the layer thickness of 20 nm to 500 nm. The electrode oxide material is employed for the manufacturing of the electrodes of pseudo-capacity supercapacitors.


The subject of this invention is a method of manufacturing an anticorrosive pigment, the anticorrosive pigment itself and its application, especially in organic protective coatings. The essence of the method, according to the invention, consists in that the reagents zinc phosphate tetrahydrate Zn_(3)(PO_(4))_(2)4H_(2)O in the amount of 110.0 g, heptamolybdate tetrahydrate (NH_(4))_(6)Mo_(7)O_(24)4H_(2)O in the amount of 40.6 g - 70 g, calcium oxide CaO in the amount of 30.1 g - 54.0 g, boric acid H_(3)BO_(3) in the amount of 100.0 g and sodium carbonate Na_(2)CO_(3) in the amount of 15.3 g - 50.1 g are thoroughly mixed and calcined at a temperature from 1000 C to 1100 C for 0.5 h to 1 h until a glass phase is formed, upon which the obtained melt containing zinc oxide ZnO in the amount of 58.6 g, phosphoric oxide P_(2)O_(5) in the amount of 34.1 g, molybdenum oxide MoO_(3) in the amount of 33.1g - 57.1 g, calcium oxide CaO in the amount of 30.1 g-54.0 g, boric oxide B_(2)O_(3) in the amount of 56.3 g and sodium oxide Na_(2)O in the amount of 8.89 g - 29.3 g, are grinded, advantageously to the grain size below 5 m. The essence of the anticorrosive pigment, according to the invention consists in that it has a form of a powdered melt containing zinc oxide ZnO in the amount of 58.6 g, phosphoric oxide P_(2)O_(5) in the amount of 34.1 g, molybdenum oxide MoO_(3) in the amount of 33.1g - 57.1 g, calcium oxide CaO in the amount of 30.1 g - 54.0 g, boric oxide B_(2)O_(3) in the amount of 56.3 g and sodium oxide Na_(2)O in the amount of 8.9 g-29.3 g, advantageously with the grain size below 5 m. Use of a powdered melt, which is added in the amount from 10.1 g to 52.6 g into 1000 g of paint as an active pigment, enhancing corrosion resistivity of coatings made from solvent and water soluble epoxy paints, and solvent and water soluble polyvinyl, acryl and alkyd epoxy paints.


Patent
Instytut Elektrotechniki | Date: 2014-01-15

The subject of the invention is a method of producing magnetic nanowires to be used particularly in the production of computer memory media. The method consists in the fact that a ferromagnetic raw material which is ground to nanometric particles is placed near a source of the magnetic field and subjected to the influence of an inhomogeneous magnetic field which produces magnetostatic force of the following value: F = m + m + m where: m constitute component values of the magnetic moment vector of nanometric particles, whereas B are component values of the magnetic flux density vector and then under the influence of this force, on the substrate made of a non-magnetic material, nanometric particles are concentrated in the places of the greatest flux density gradients, thus forming islands which grow in an anisotropic way along the lines of the magnetic field force and produce nanowires.


The subject of this invention is a system for measuring the characteristics of soft magnetic materials, in particular sheets and tapes with arbitrary shapes, by nondestructive method. The system contains a generator (1) connected through a block for signal conditioning (2), active filter (3) and power amplifier (4) with an input of measuring head (5) whose at least one couple of output terminals is connected through the circuit for measuring signals conditioning (6) and the circuit for data collection (7) with an analog-digital transducer (8) connected to a microprocessor (13), whereas the microprocessor (13) is connected with the screen (12) and through the control circuit of the block for measuring signals conditioning (9) with the circuit for conditioning measuring signals (6) through the control system for generator (11) with the generator (1) and also through the circuit for shunt control (10) with the shunt (18) connected between the measuring head (5) and the ground.

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