Littérature scientifique sur le sujet « Cobaltite de calcium »
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Articles de revues sur le sujet "Cobaltite de calcium"
Yu, Jincheng, et Robert Freer. « Calcium cobaltite, a promising oxide for energy harvesting : effective strategies toward enhanced thermoelectric performance ». Journal of Physics : Energy 4, no 2 (15 mars 2022) : 022001. http://dx.doi.org/10.1088/2515-7655/ac5172.
Texte intégralKim, Dong-Wan, Young-Dae Ko, Jong-Sung Park, Hae-June Je, Ji-Won Son et Joosun Kim. « Electrochemical Performance of Calcium Cobaltite Nano-Plates ». Journal of Nanoscience and Nanotechnology 9, no 7 (1 juillet 2009) : 4056–60. http://dx.doi.org/10.1166/jnn.2009.m10.
Texte intégralRomo-De-La-Cruz, C., L. Liang, S. A. Paredes Navia, Y. Chen, J. Prucz et X. Song. « Role of oversized dopant potassium on the nanostructure and thermoelectric performance of calcium cobaltite ceramics ». Sustainable Energy & ; Fuels 2, no 4 (2018) : 876–81. http://dx.doi.org/10.1039/c7se00612h.
Texte intégralBaily, S. A., et M. B. Salamon. « Anomalous Hall effect of calcium-doped lanthanum cobaltite films ». Journal of Applied Physics 93, no 10 (15 mai 2003) : 8316–18. http://dx.doi.org/10.1063/1.1540183.
Texte intégralLee, Hwasoo, Felipe Caliari et Sanjay Sampath. « Thermoelectric properties of plasma sprayed of calcium cobaltite (Ca2Co2O5) ». Journal of the European Ceramic Society 39, no 13 (octobre 2019) : 3749–55. http://dx.doi.org/10.1016/j.jeurceramsoc.2019.05.008.
Texte intégralSopicka-Lizer, Małgorzata, Paweł Smaczyński, Karolina Kozłowska, Ewa Bobrowska-Grzesik, Julian Plewa et Horst Altenburg. « Preparation and characterization of calcium cobaltite for thermoelectric application ». Journal of the European Ceramic Society 25, no 12 (janvier 2005) : 1997–2001. http://dx.doi.org/10.1016/j.jeurceramsoc.2005.03.222.
Texte intégralSrepusharawoot, Pornjuk, Supree Pinitsoontorn et Santi Maensiri. « Electronic structure of iron-doped misfit-layered calcium cobaltite ». Computational Materials Science 114 (mars 2016) : 64–71. http://dx.doi.org/10.1016/j.commatsci.2015.12.006.
Texte intégralTang, G. D., H. H. Guo, T. Yang, D. W. Zhang, X. N. Xu, L. Y. Wang, Z. H. Wang, H. H. Wen, Z. D. Zhang et Y. W. Du. « Anisotropic thermopower and magnetothermopower in a misfit-layered calcium cobaltite ». Applied Physics Letters 98, no 20 (16 mai 2011) : 202109. http://dx.doi.org/10.1063/1.3592831.
Texte intégralSekak, Khairunnadim Ahmad, et Adrian Lowe. « Structural and Thermal Characterization of Calcium Cobaltite Electrospun Nanostructured Fibers ». Journal of the American Ceramic Society 94, no 2 (28 septembre 2010) : 611–19. http://dx.doi.org/10.1111/j.1551-2916.2010.04106.x.
Texte intégralKlyndyuk, A. I., et I. V. Matsukevich. « Synthesis and properties of disubstituted derivatives of layered calcium cobaltite ». Glass Physics and Chemistry 41, no 5 (septembre 2015) : 545–50. http://dx.doi.org/10.1134/s1087659615050077.
Texte intégralThèses sur le sujet "Cobaltite de calcium"
El, Bassiri Fatima-Ezzahra. « Étude de la réaction de réduction de l'oxygène : application de la spectroscopie d'impédance à un système innovant dérivé de Ca3Co4O9+δ ». Electronic Thesis or Diss., Centrale Lille Institut, 2024. http://www.theses.fr/2024CLIL0003.
Texte intégralIn the context of energy transition towards carbon neutrality by 2050, Solid Oxide Fuel Cells (SOFCs) and Solid Oxide Electrolysis Cells (SOECs) offer real potential for use via hydrogen as an energy carrier. The aim of this thesis is to understand the electrochemical processes in these systems, with a view to improving their performance and durability. The technique chosen is impedance spectroscopy to study the oxygen reduction reaction. This is a complex reaction involving several stages: diffusion of molecular oxygen, dissociation of molecular oxygen at the electrode surface, diffusion of oxygen or partially ionized atoms at the solid surface or their incorporation into the solid, charge transfer, diffusion of ions into the solid, etc. Whereas gaseous diffusion is a slow process, ionic diffusion in solids is rapid. The detailed study of impedance spectra measured on symmetrical cells enables us to define the steps that limit the reaction and identify the directions to take to optimize the systems. This requires the measurement of reliable data. The Kramers-Krönig test is used to check the quality of the data. From these data, it is possible to calculate the distribution function of the relaxation times characteristic of the phenomena involved within the cell, but as the number of data is finite, solving the equation associated with this function is not straightforward. The aim of this thesis was first to define a methodology for the rigorous processing of impedance spectra measured on symmetrical cells consisting of a gadolinium-doped ceria electrolyte on which a model electrode based on Ca3Co4O9+δ, an innovative electrode material studied for several years at UCCS, has been deposited. Unlike state-of-the-art materials, calcium cobaltites have the advantage of not containing rare earths and, above all, of presenting an expansion coefficient of the same order of magnitude as that of the electrolytes used for these applications, giving rise to the hope of increased durability. Initially used as a model electrode, the substitution of strontium for calcium in this compound and its use as a composite with ceria enabled the specific features required for the application to be achieved: a specific surface resistance of less than or equal to 0.15 Ω.cm² at 700°C. The study was then extended to the characterization of complete cells. This thesis was funded by the Hauts de France Region and Centrale Lille. Part of the work was carried out as part of the MODTESTER project, a BPI-funded Eurostars Eureka project led by Fiaxell, a Swiss SME, and as part of the European NOUVEAU project, which focuses on the search for new, sustainable and reusable electrode and interconnector materials for high-temperature water electrolysis
Токарева, Е. С., et E. S. Tokareva. « Получение и функциональные свойства сложнооксидных материалов на основе Ca3Co4O9+δ как перспективных катодов для среднетемпературных ТОТЭ : магистерская диссертация ». Master's thesis, б. и, 2021. http://hdl.handle.net/10995/99985.
Texte intégralThe object of study in this work is a cathode material based on the Сa3Co4O9+δ. The aim of the work is to study the electrochemical behavior of electrodes based on the Сa3Co4O9+δ with the electrolyte materials BaCe0.5Zr0.3Y0.1Yb0.1O3- and BaCe0.7Zr0.1Y0.1Yb0.1O3-. The synthesis of the Сa3Co4O9+δ, Ca3Co4-xCuxO9 (х = 0.05; 0.1; 0.15; 0.2), BaCe0.5Zr0.3Y0.1Yb0.1O3-δ and BaCe0.7Zr0.1Y0.1Yb0.1O3- complex oxides was carried out by pyrolysis of citrate-salt compositions. Using a complex of modern research methods, phase, structural and microstructural attestation of the Сa3Co4O9+δ, Ca3Co4-xCuxO9 (х = 0.05; 0.1; 0.15; 0.2), BaCe0.5Zr0.3Y0.1Yb0.1O3-δ and BaCe0.7Zr0.1Y0.1Yb0.1O3- oxides were carried out. The thermal stability of the Сa3Co4O9+δ in air and in the argon atmosphere was studied by the thermo gravimetrical method. The thermal expansion of the Сa3Co4O9+δ and BaCe0.5Zr0.3Y0.1Yb0.1O3-δ oxides was studied by dilatometry, and their thermal compatibility was proved. The chemical compatibility of the Сa3Co4O9+δ oxide with the electrolyte materials Ba2In1.8W0.2O5.15, 0.7Ba2In2O5·0.3Ba2InNbO6, Ba3Ca1.18Nb1.82O9 δ, BaCe0.5Zr0.3Y0.1Yb0.1O3-δ, Lа0.6Sr0.4MnO3-δ and LaNi0.6Fe0.4О3-δ collector materials was studied, the optimal temperature of the cathode material Сa3Co4O9+δ annealing to the BaCe0.5Zr0.3Y0.1Yb0.1O3-δ electrolyte was established. The temperature dependences of the electrical conductivity of the Сa3Co4O9+δ and BaCe0.5Zr0.3Y0.1Yb0.1O3-δ in air were investigated. Electrodes based on composites with different mass contents of Сa3Co4O9+δ and BaCe0.5Zr0.3Y0.1Yb0.1O3-δ on substrates of BaCe0.5Zr0.3Y0.1Yb0.1O3-δ, as well as electrodes based on Ca3Co4-xCuxO9 (х = 0; 0.05; 0.1; 0.15) on substrates of BaCe0.7Zr0.1Y0.1Yb0.1O3 were formed. The polarization characteristics of the obtained electrodes, including those with an La0.6Sr0.4MnO3-δ+2 wt.% CuO oxide collector, were studied by the method of impedance spectroscopy on the symmetric cells.
Tchiffo, Tameko Cyril. « Croissance et propriétés de couches minces d’oxydes pour microsources d’énergie ». Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2068/document.
Texte intégralThis thesis concerns the realization of oxide thin films and the study of their properties for photovoltaic or thermoelectric devices. In the first part, the TiOx properties are studied for use as an optically active transparent conductive oxide to put in front of the PV cells or, as optical coupling layer to interpose between the metal reflector and the absorbent layer of a PV cell. The layers are deposited by pulsed laser deposition (PLD). This method allows to get stoichiometric or oxygen deficient layers by controlling the oxygen partial pressure during the growth. The layers are doped with Nb to enhance electrical conductivity and/or with Nd for the conversion of Ultra-Violet photons to Near Infra-Red photons. Insulating and transparent layers, luminescent layers or conducting and absorbent layers are obtained. The TiO₁,₄₅₋₁,₆₀ films show polaronic or bipolaronic conductivity and exhibited the jump of electrical conductivity with jump height and temperature depending on the nature of the dopants. A second part of the manuscript concerns thermoelectricity in which the properties of cobalt calcium oxide are modulated for an efficient conversion of low temperature gradients centered at 300-365K. The control of the oxygen concentration of films allows to obtain the polymorphic phases CaxCoO₂,Ca₃Co₄O₉ and Ca₃Co₄O₆,₄₋₆,₈ having metallic or semiconducting behavior depending on the deposition temperature. The Ca₃Co₄O₆,₄₋₆,₈ films show high Seebeck coefficients (S) ≥ 1 000 μV/K and low electrical resistivity (3.8 to 6 mΩ.cm). Such interesting values have to be confirmed by additional experiments in order to be used as thermoelectric films
Roberts, Michael James. « Development and characterisation of electrospun calcium cobaltites for high temperature thermoelectric applications ». Phd thesis, 2015. http://hdl.handle.net/1885/156244.
Texte intégralBehera, Sukanti. « Thermoelectrics and Oxygen Sensing Studies of Selected Perovskite Oxides ». Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2975.
Texte intégralBehera, Sukanti. « Thermoelectrics and Oxygen Sensing Studies of Selected Perovskite Oxides ». Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2975.
Texte intégralChapitres de livres sur le sujet "Cobaltite de calcium"
Lin, Sidney, Jiri Selig, Hua-Tay Lin et Hsin Wang. « Self-Propagating High-Temperature Synthesis of Calcium Cobaltate Thermoelectric Powders ». Dans Advanced Materials for Sustainable Developments, 15–24. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470944080.ch2.
Texte intégralActes de conférences sur le sujet "Cobaltite de calcium"
Neto, Alfredo Gomes, Joabson Nogueira de Carvalho, Jefferson Costa e Silva, Chrystian G. M. Lima, Rafael A. Raimundo et Daniel A. Macedo. « Miniaturization of DGS Filter Based on Matryoshka Geometry Using Calcium Cobaltite Ceramic ». Dans 2023 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC). IEEE, 2023. http://dx.doi.org/10.1109/imoc57131.2023.10379697.
Texte intégralMishra, Avinna, Sudipta Mahana, Dinesh Topwal, U. Manju et Sarama Bhattacharjee. « Optical and low temperature magnetic properties study on sol-gel derived misfit calcium cobaltite ». Dans DAE SOLID STATE PHYSICS SYMPOSIUM 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4980198.
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