ABSTRACT PILHAS A COMBUSTÍVEL
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This paper aims to synthesize and characterize ceramic materials for use as the cathode and electrolyte in a solid oxide fuel cell. Characterization techniques such as electrochemical impedance spectroscopy, X-ray diffraction, scanning electron microscopy with EDX, and surface area analysis are used to identify the perovskite mineral phase and physical properties of Pr2NiMnO6-a as the cathode and BaZr0.1La0.7Y0.2O3 as the electrolyte alternative to BZCY structures. The properties analyzed include surface area, electrochemical conductivity, and chemical conductivity within a temperature range of 500-700°C.
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Laksman2014-Cysteine
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1.4938247
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Chap-4 Modern theory of solids.pptx
The document discusses molecular orbital theory of bonding in hydrogen molecules. It explains how the bonding molecular orbital is formed from the linear combination of atomic orbitals of the two hydrogen atoms. As the hydrogen atoms approach each other, their atomic orbitals overlap to form the lower energy bonding molecular orbital which is filled by the two electrons, and the higher energy antibonding molecular orbital which remains empty. A diagram and energy level diagram are provided to illustrate this process.
Investigation of Effect Ion Refocusing From the GaP(001)<110> Surface at the ...
The effect ion refocusing at the small angle scattering Ne+ ions from the GaP(001) surface have been studied by the computer simulation method. The characteristic trajectories refocusing ions have been studied. Kutliev UchkunOtoboevich | Tangriberganov Ismoil Urazboyevich | Karimov Muxtor Karimberganovich | Otaboeva Kamola Uchqun qizi"Investigation of Effect Ion Refocusing From the GaP(001) Surface at the Grazing Incidence Ne+ Ions" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-5 , August 2017, URL: http://www.ijtsrd.com/papers/ijtsrd2397.pdf http://www.ijtsrd.com/physics/computational-physics/2397/investigation-of-effect-ion-refocusing-from-the-gap001110-surface--at-the-grazing-incidence-ne-ions/kutliev-uchkunotoboevich
Morphological instabilities in argon ion sputtered cosi binary mixtures
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Study of Microstructural, Electrical and Dielectric Properties of La0.9Pb0.1M...
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The present work studies the microstructural and electrical properties of La0.9Pb0.1MnO3 and La0.8Y0.1Pb0.1MnO3 ceramics synthesized by solid-state route method. Microstructure and elemental analysis of both samples were carried out by field emission scanning electron microscope (FESEM) and energy dispersive spectroscopy (EDS) method, respectively. Phase analysis by X-ray diffraction (XRD) indicated formation of single phase distorted structure. The XRD data were further analyzed by Rietveld refinement technique. Raman analysis reveals that Y atom substitutes La site into the LPMO with shifting of phonon modes. The temperature variation of resistivity of undoped and Y-doped La0.9Pb0.1MnO3 samples have been investigated. The electrical resistivity as a function of temperature showed that all samples undergo an metal-insulator (M-I) transition having a peak at transition temperature TMI. Y-doping increases the resistivity and the metal-insulator transition temperature (TMI) shifts to lower temperature. The temperature-dependent resistivity for temperatures less than metal-insulator transition is explained in terms the quadratic temperature dependence and for T > TMI, thermally activated conduction (TAC) is appropriate. Variation of frequency dispersion in permittivity and loss pattern due to La-site substitution in LPMO was observed in the dielectric response curve.Similar to ABSTRACT PILHAS A COMBUSTÍVEL (20)
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- 1. Abstract The search for sustainable production of electricity is not as recent as one might think. For nearly two centuries, about 160 years ago, since it sought to transform the chemical energy available in organic and inorganic molecules into electrical energy. Since that time if desired, to obtain a direct conversion zero-emissions (STEELE, B.C. & HEINZEL, A., 2001). This paper aims to synthesize and characterize a ceramic material for the cathode and the electrolyte of a cell type SOFC and characterize them by the technical electrochemical impedance spectroscopy - EIS, X-ray diffraction, electron microscopy X-ray - SEM coupled with EDX - X-ray Fluorescence - XRD and surface area analysis - BET. Such characterizations sought to identify the mineral perovskite phase (MAO, X.; YU, T.; MA, G. 2015), with the following chemical composition, Pr2NiMnO6-a the cathode and to BaZr0.1La0.7Y0.2O3 (BZLY) to the electrolyte, as an alternative to the structure BZCY - BaZr0.1La0.7Y0.2O3-a (LI, H. et al, 2015) as well as its physical properties as surface area as electrochemical and chemical conductivity to the track temperature of 500°C to 700°C.