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Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
2011 Nr 42 227--229
EN The article defines the endurance period of fire protection efficacy as one of the most important characteristics for quality assessment of fire retardants. Experimental methods for determination of endurance period of fire protection efficacy for fire retardant coatings and endurance period of fire[...]
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Materials Science Poland
2007 Vol. 25, No. 3 649--655
EN Metal phthalocyanines are important among organic dyes because of their chemical and thermal stability. Thin film samples of tin phthalocyanine (SnPc) have been prepared for examination by thermal evaporation technique. Some optical and electrical properties of the samples were studied as a function[...]
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Materials Science Poland
2008 Vol. 26, No. 3 787--796
EN The mechanism of heterogeneous catalysis is still under discussion. There is no clear theory which explains the mechanism of influence of materials on the rate of chemical reactions. All existing theories assume that specific materials, catalysts, decrease activation energy Ea. We hypothesize that f[...]
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Physicochemical Problems of Mineral Processing
EN Recovery of metallic copper from the leach solution containing copper (II) ions by cementation process using aluminum disc has been examined. Solutions obtained from the leaching of malachite in aqueous acetic acid solutions were used in the study. It was determined that the cementation rate increas[...]
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Czasopismo Techniczne. Mechanika
PL Dekohezja materiałów polimerowych to wciąż dziedzina, w której mamy wiele pytań bez odpowiedzi. Pomocne w tym przypadku mogą okazać się badania nad energią aktywacji potrzebną do zerwania wiązań między włóknem a osnową. Jej wyznaczenie dostarczyć może cennych informacji na temat zachodzących w kompo[...]
EN One of the methods that is to help to understand relationship between mechanical features of composites and value of energy dissipation can be marking and evaluation of the value of activation energy. Reaching a certain level of stress causes the occurrence of microdefects, it leads to decohesion of[...]
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Geochronometria
EN Pulse annealing has been the subject of several studies in recent years. In its basic form, it consists of relatively short-time optically stimulated luminescence (OSL) measurements of a given sample after annealing at successively higher temperatures in, say, 10°C increments. The result is a decrea[...]
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Polish Journal of Chemistry
EN The TG-DTG and DTA study of dipositive platinum(II) complexes of the general formula [Pt(L-L)(dppmS2)](ClO4)2, where dppmS2 = Ph2P(S)CH2P(S)Ph2 and L-L = dppm (Ph2PCH2PPh2), dppe (Ph2PCH2CH2PPh2), and dppp (Ph2PCH2CH2CH2PPh2), were studied by thermogravimetric analysis from ambient temperature to 10[...]
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Optica Applicata
EN The investigation of Fe78Si9B13 metallic glass was carried out by means of non- isothermal DSC and X-ray diffraction methods. Two crystalline phases: ?-Fe(Si) and (Fe,Si)2B were identified during the crystallization process. Based on the Kissinger equation[...]
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Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
EN The research on the electrical conductivity of the FDO oil (dioctyl phthalate) during the Joule heating, based on Joule's law, was realized. Attempt was made to heat the oil without its flow in a stationary heater, with plane parallel electrodes oriented horizontally. On the basis of an analysis of [...]
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Materials Science Poland
2005 Vol. 23, No. 3 707--713
EN Vacuum evaporated thin films of indium phthalocyanine chloride are prepared at room temperature. Post evaporation annealing is done at temperatures of 353 K, 403 K, 453 K and 503 K. The electrical conductivity and optical absorption spectra of these films are studied. From the optical absorption spe[...]
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Materials Science Poland
2014 Vol. 32, No. 4 583--591
EN The paper presents a new model of the mechanism of mechanocatalysis and tribocatalysis. The reason for the increase in heterogeneous catalysis effect after mechanical activation of a catalyst has not been fully understood yet. There is no known theory, which would explain the mechanism of the influe[...]
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Archives of Metallurgy and Materials
2017 Vol. 62, iss. 3 1427--1432
EN The paper analyses the characteristics of plasticity and microstructure of magnesium alloys with lithium meant for hot plastic working with different lithium content. The alloys were prepared in conditions of vacuum smelting. Achieved ingots were subject to hot extrusion. Tests on Gleeble simulator [...]
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Archives of Metallurgy and Materials
EN The pearlite spheroidization in Fe-0.76%C high purity steel was investigated. The samples of a coarse pearlite microstructure were isothermal annealed at 700, 680, 660, 640 and 620°C for various times, up to 800 hours. For quantitative description of the spheroidization process stereological paramet[...]
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Archives of Metallurgy and Materials
EN Growth kinetics of boride layers in AISI H13 steel was investigated using the pack boriding method at temperatures of 1073, 1173 and 1273 K (800°C, 900°C and 1000°C) for periods of 2, 4 and 6 h with nano-sized boron (NB) and micron-sized Ekabor II powders as boriding agents. The total thickness of t[...]
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Polish Journal of Chemical Technology
2016 Vol. 18, nr 2 122--125
EN In this research work, thermal decomposition and kinetic analysis of pure and contaminated imidazolium based ionic liquid (IL) has been investigated. As thermal decomposition and kinetics evaluation plays a pivotal role in effective process design. Therefore, thermal stability of pure 1-butyl-2,3-di[...]
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Central European Journal of Energetic Materials
EN This paper describes a new approach to determine the activation energy of propellant decomposition reactions which quantifies the temperature dependence of a reaction rate at temperatures below 50 C by using an indirect microcalorimetric method. Whereas the determination of life time and stability o[...]
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Central European Journal of Energetic Materials
2014 Vol. 11, no. 3 405--416
EN The thermal behaviour of energetic materials is very important for their safe production, storage, handling and even demilitarization. In this work, the thermal behaviour and decomposition kinetics of conventional C4 plastic explosive has been studied experimentally by a non-isothermal thermogravime[...]
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Central European Journal of Energetic Materials
EN Thermolysis initiation mechanisms of polynitro compounds, tetrazole derivatives and their metallic salts, and cage high energy density compounds have been investigated using quantum chemical approaches. Our calculations showed that the trigger bonds whose breaking initiate a decomposition or an expl[...]
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Central European Journal of Energetic Materials
2015 Vol. 12, no. 4 689--702
EN In order to explore the polymorphic transition law for ε-CL-20 in composite systems, the polymorphic transition process of pure ε-CL-20 crystals stimulated by heat was investigated by the X-ray Diffraction (XRD) method, and the kinetic parameters of the polymorphic transition process were calculated[...]
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Materials Science Poland
2009 Vol. 27, No. 3 825--837
EN Single phase non-stoichiometric bismuth zinc niobate, Bi3Zn1.84Nb3O13.84, was fabricated by a conventional solid state method. The sample was refined and fully indexed on the cubic system, space group Fd3m (No. 227), Z = 4 with A = 10.5579(4) A. Electrical characterisation was performed using an ac [...]
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