Thematische Bibliographien / Cu₂O

Auswahl der wissenschaftlichen Literatur zum Thema „Cu₂O“

Autor: Grafiati

Veröffentlicht am 8. Juni 2024

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Zeitschriftenartikel zum Thema "Cu₂O"

Hallstedt, Bengt, und Ludwig J. Gauckler. „Revision of the thermodynamic descriptions of the Cu–O, Ag–O, Ag–Cu–O, Bi–Sr–O, Bi–Ca–O, Bi–Cu–O, Sr–Cu–O, Ca–Cu–O and Sr–Ca–Cu–O systems“. Calphad 27, Nr. 2 (Juni 2003): 177–91. http://dx.doi.org/10.1016/s0364-5916(03)00050-6.

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Harada, Keizo, Saburo Tanaka, Hideo Itozaki und Shuji Yazu. „Heteroepitaxial Growth of Y-Ba-Cu-O/Bi-Sr-Cu-O/Y-Ba-Cu-O“. Japanese Journal of Applied Physics 29, Part 2, No. 7 (20.07.1990): L1114—L1116. http://dx.doi.org/10.1143/jjap.29.l1114.

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Zhang, Wei, und Kozo Osamura. „Phase diagram of Ba-Cu-O and Y-Cu-O systems.“ Journal of the Japan Society of Powder and Powder Metallurgy 37, Nr. 1 (1990): 122–26. http://dx.doi.org/10.2497/jjspm.37.122.

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Alvarez, G. A., M. Becht, T. Utagawa, K. Toma, U. Kawabe, F. Wang, Y. Li, F. Saba, M. Sato und K. Tanabe. „Fabrication and properties of Nd-Ba-Cu-O/Pr-Ba-Cu-O/Nd-Ba-Cu-O ramp-edge junctions“. IEEE Transactions on Appiled Superconductivity 9, Nr. 2 (Juni 1999): 3370–73. http://dx.doi.org/10.1109/77.783752.

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Yoshida, Makoto, Toshinori Muramatsu, Jia Fu Hong und Hideo Nakae. „Solidification of Undercooled Cu, Cu-O and Cu-S Alloys“. Journal of the Japan Institute of Metals 60, Nr. 11 (1996): 1095–100. http://dx.doi.org/10.2320/jinstmet1952.60.11_1095.

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Stavola, Michael, D. M. Krol, W. Weber, S. A. Sunshine, A. Jayaraman, G. A. Kourouklis, R. J. Cava und E. A. Rietman. „Cu-O vibrations ofBa2YCu3Ox“. Physical Review B 36, Nr. 1 (01.07.1987): 850–53. http://dx.doi.org/10.1103/physrevb.36.850.

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Lustosa, Tertuliana Mascarenhas. „Educando com o cu“. Revista Periódicus 2, Nr. 19 (06.12.2023): 180–92. http://dx.doi.org/10.9771/peri.v2i19.55050.

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O presente texto busca iniciar um debate levantado através da aula “Educando com o cu: traveco-terrorismo e descolonialidade de gênero na arte”, para pensar implicações do prazer e do corpo enquanto potências pedagógicas e artísticas. Sendo assim, foi transcrita toda a introdução da aula realizada na Escola de Dança da Universidade Federal da Bahia (UFBA), que discute inclusive sobre a resposta midiática e a sua recepção no espaço público. O texto transpõe a oralidade enquanto mecanismo de produção de conhecimento, sendo assim, o que foi escrito surge do ato oral. E, por fim, o texto traz uma conclusão escrita sobre os temas apresentados, pensando ainda em visões e perspectivas dissidentes de pesquisadores brasileiros sobre o tema.

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Wiesner, U., M. Ritschel und G. Krabbes. „Thermochemical Investigations in the Systems Y-Cu-O and Ba-Cu-O“. Materials Science Forum 62-64 (Januar 1991): 109–10. http://dx.doi.org/10.4028/www.scientific.net/msf.62-64.109.

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Mota, A. C., A. Pollini, P. Visani, K. A. Müller und J. G. Bednorz. „RELAXATION EFFECTS IN Ba-La-Cu-O AND Sr-La-Cu-O“. International Journal of Modern Physics B 01, Nr. 03n04 (August 1987): 903–10. http://dx.doi.org/10.1142/s0217979287001286.

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Takagi, Hidenori, Shin-ichi Uchida, Hisashi Sato, Hideo Ishii, Kohji Kishio, Koichi Kitazawa, Kazuo Fueki und Shoji Tanaka. „Bulk Superconductivity of Y-Ba-Cu-O and Er-Ba-Cu-O“. Japanese Journal of Applied Physics 26, Part 2, No. 5 (20.05.1987): L601—L602. http://dx.doi.org/10.1143/jjap.26.l601.

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Dissertationen zum Thema "Cu₂O"

Martin, Airton Abrahao. „Preparação e caracterização de cerâmicas supercondutoras nos sistemas Y-Ba-Cu-O e Tm-Ba-Cu-O“. Universidade de São Paulo, 1988. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-18122013-112538/.

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Neste trabalho estudamos a influencia da temperatura e tempo de reação e sinterização na preparação de amostras cerâmicas supercondutoras pelo método de reação no estado sólido. Os resultados indicam claramente que algumas propriedades destes supercondutores, tais como: temperatura crítica (Tc), susceptibilidade magnética (X), resistividade (ρ), microestruturas, densidade e porosidade aparente, sofrem forte influencia das condições de tratamento térmico. Foram preparadas várias amostras dos sistemas YBa2Cu3O6.5+x e TmBa2Cu3O6.5+x, sendo que a temperatura e tempo ideal de reação encontrados foram de 950°C por 6 horas e 925°C por 48 horas, respectivamente; ambas tratadas em fluxo de oxigênio. A caracterização destas amostras foram feitas pelas técnicas de difração de raios-x, técnica de quatro-pontas (medida da variação da resistividade pela temperatura), ponte de Hartshorn (para a medida da variação da susceptibilidade magnética pela temperatura), microscopia eletrônica de varredura (para análise das microestruturas) e método de imersão (para a medida da densidade e porosidade aparente). A maior temperatura crítica encontrada foi de aproximadamente 94K para YBa2Cu3O6.5+x e de aproximadamente 91K para o TmBa2Cu3O6.5+x
The influence of the temperature and time in the reaction and sinterization of superconducting ceramics prepared by a solid state reaction was determined. The results clearly showed that some of its properties, such as critical temperature (Tc), magnetic susceptibility (X), resistivity (ρ), microstructure, apparent density, and porosity undergo a strong influence of the preparation conditions. Some samples in the YBa2Cu3O6.5+x and TmBa2Cu3O6.5+x systems were prepared. The ideal reaction temperature and time were 950°C for 6 hours and 925°C for 48 hours, respectively. Both annealed in O2 flow. The sample characterization was made by using X-ray diffraction, standard four probe (measures the variation of resistivity versus temperature), Bridge of Hartshorn (the variation of susceptibility versus temperature), scanning electron micrograph (microstructure analysis), and immersion method (measures the apparent density and porosity). The greatest critical temperature was approximately 94K for YBa2Cu3O6.5+x and 91K for TmBa2Cu3O6.5+x

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Heffernan, Shane. „Nanostructured CU₂O solar cells“. Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709220.

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Seibel, B. [Verfasser]. „Berechnungen von Röntgenabsorptionsspektren an YBa₂Cu₃O₇, PrBa₂Cu₃O₇ und Sr₂RuO₄ / B. Seibel“. Karlsruhe : KIT-Bibliothek, 1997. http://d-nb.info/1108447422/34.

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Sene, Abdoulaye. „Formation et fonctionnement des sites actifs des catalyseurs d'hydrogénation Cu-Zn-O et Cu-Zn-Al-O“. Lille 1, 1990. http://www.theses.fr/1990LIL10166.

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Thermogravimétrie, spectroscopies SPX et AUGER, mesures cinétiques ont été utilisées pour caractériser très finement différents catalyseurs Cu-Zn-Al-O couramment utilisés en synthèse du méthanol. A l'état réduit à 523 k, les principaux éléments dégagés de notre étude sont : 1) la présence de cuivre métal et d'une fraction de cuivre à l'état partiellement oxyde et inséré dans le réseau Zn-Al-O ; 2) la présence d'une espèce hydrogène extractible, localisée dans le réseau des oxydes résiduels ; 3) l'existence d'ions hydroxyles relativement mobiles auxquels nous avons attribué un phénomène de blocage des sites hydrogénants. La prise en compte de ces différents points associée à une étude cinétique d'hydrogénation de l'isoprène en l'absence d'hydrogène nous ont amené à établir un modèle de sites actifs et un modèle cinétique d'extraction des espèces hydrogène. Ces modèles sont transposables à toute une classe de catalyseurs à base de cuivre. Le modèle cinétique a permis d'évaluer la quantité d'espèces hydrogène localisées à la surface et qui interviennent dans la détermination des aires métalliques et dans le processus catalytique d'hydrogénation. Enfin, l'influence de la nature des phases sur les caractéristiques et performances des catalyseurs a été discutée.

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Brito, Juliana Ferreira de [UNESP]. „Estudo da redução fotocatalítica e fotoeletrocatalítica de 'CO IND. 2' em meio aquoso sobre 'CU'/'CU IND. 2 'O'', 'TI' 'O IND. 2'/'PT', 'CU''NB' 'O IND. 3' - 'CU''O' e 'CU IND. 0,85''ZN IND. 0,15''NB IND. 2''O IND.6' como catalisadores para formação de metanol“. Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110841.

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Made available in DSpace on 2014-12-02T11:16:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-16Bitstream added on 2014-12-02T11:21:05Z : No. of bitstreams: 1 000775296_20150116.pdf: 449463 bytes, checksum: 43558585e6fb22e6d593a800fe0eebb0 (MD5) Bitstreams deleted on 2015-01-23T10:59:21Z: 000775296_20150116.pdf,Bitstream added on 2015-01-23T10:59:53Z : No. of bitstreams: 1 000775296.pdf: 2220721 bytes, checksum: 20bda960969f72c4be9130ed074b0799 (MD5)
O presente trabalho reporta os principais resultados obtidos na construção e caracterização de eletrodos de titânio recobertos com nanotubos de óxido de titânio modificados com nanopartículas de platina (TiO2/Pt) e eletrodos de cobre recobertos com nanopartículas de óxido de cobre (Cu/Cu2O) com vistas a sua aplicação na redução fotoeletrocatalítica de CO2 em meio aquoso e semicondutores em pó de CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 e ZnNb2O6-Nb2O5 construídos e testados na redução fotocatalítica de CO2, com vistas a geração de produtos com maior valor agregado, tal como metanol. Os eletrodos TiO2/Pt e Cu/Cu2O foram construídos por meio de técnicas de eletroquímicas, enquanto que os semicondutores em pó CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 e ZnNb2O6-Nb2O5 foram preparados utilizando a técnica de síntese por combustão e calcinação posterior. A redução fotoeletrocatalítica e fotocatalítica de CO2 não foi satisfatória sobre eletrodos de TiO2/Pt e semicondutor ZnNb2O6-Nb2O5, respectivamente. No entanto, o eletrodo de Cu/Cu2O apresentou grande eficiência na redução de CO2, atingindo 80% de remoção em meio de Na2CO3 0,3 mol L-1 pH 9 a +0,2 V, em solução tampão de NaHCO3/Na2CO3 0,1 mol L-1 pH 8, utilizando luz UV 125 W e potencial de +0,2 V mostrou uma reação praticamente seletiva para metanol, gerando 5,63 mmol L-1, correspondendo a 20% de conversão. Os semicondutores em pó CuNbO3-CuO e Cu0,85Zn0,15Nb2O6 também se mostraram bastante eficientes para a geração de metanol por redução de CO2 dissolvido em Na2CO3 0,1 mol L-1 pH8 utilizando luz visível de 450 W, chegando a formar 7,0 mmol L-1 e 3,2 mmol L-1 de metanol respectivamente. Os resultados obtidos neste trabalho mostram que ambas as técnicas podem ser empregadas para a redução do CO2, usando para isto os semicondutores Cu/Cu2O, CuNbO3-CuO e Cu0,85Zn0,15Nb2O6 e, poderia ser uma potencial alternativa para os problemas ambientais além de contribuir como fonte...
This present work reports the main results obtained with the construction and characterization of TiO2 nanotubes modified by platinum nanoparticle electrode (TiO2/Pt) and copper covered by copper oxide nanoparticles electrode (Cu/Cu2O) for application in the photoelectrocatalytic reduction of dissolved CO2 and CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 and ZnNb2O6-Nb2O5 powders semiconductors constructed and applied in the photocatalytic reduction of dissolved CO2 for the generation of products with higher added value. The TiO2/Pt and Cu/Cu2O electrodes were prepared by electrochemical techniques, whereas the CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 and ZnNb2O6-Nb2O5 powder semiconductors were prepared using the combustion synthesis technique and submitted to annealed. The CO2 reduction by photoelectrocatalysis and photocatalysis were not satisfactory when using the TiO2/Pt electrode and the ZnNb2O6-Nb2O5 semiconductor, respectively. However, the Cu/Cu2O electrode shows a high efficiency in the CO2 reduction obtaining 80% of removal in 0.3 mol L-1 Na2CO3 pH 9 and +0.2 V, and, it showed a practically selective reaction to methanol (producing 5.63 mmol L-1), corresponding to 20% of conversion at ambient of 0.1 mol L-1 NaHCO3/Na2CO3 butter solution pH 8, using UV light of 125 W and +0,2 V. The CuNbO3-CuO and Cu0,85Zn0,15Nb2O6 powder semiconductors also showed a good efficiency to the methanol formation throughout dissolved CO2 reduction in 0.1 mol L-1 Na2CO3 pH 8 using visible light of 450 W, and forming 7 mmol L-1 and 3.2 mmol L-1 of methanol, respectively. The results obtained in this work show that both techniques can be employed for the CO2 reduction, using for this the Cu/Cu2O, CuNbO3-CuO and Cu0,85Zn0,15Nb2O6 semiconductors, and it could be a potential alternative to the environmental problems and contribute as raw material source for the production of fuels, for instance.

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Brito, Juliana Ferreira de. „Estudo da redução fotocatalítica e fotoeletrocatalítica de 'CO IND. 2' em meio aquoso sobre 'CU'/'CU IND. 2 'O'', 'TI' 'O IND. 2'/'PT', 'CU''NB' 'O IND. 3' - 'CU''O' e 'CU IND. 0,85''ZN IND. 0,15''NB IND. 2''O IND.6' como catalisadores para formação de metanol /“. Araraquara, 2014. http://hdl.handle.net/11449/110841.

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Orientador: Maria Valnice Boldrin
Banca: Mário César Guerreiro
Banca: Luiz Henrique Dall'antonia
Resumo: O presente trabalho reporta os principais resultados obtidos na construção e caracterização de eletrodos de titânio recobertos com nanotubos de óxido de titânio modificados com nanopartículas de platina (TiO2/Pt) e eletrodos de cobre recobertos com nanopartículas de óxido de cobre (Cu/Cu2O) com vistas a sua aplicação na redução fotoeletrocatalítica de CO2 em meio aquoso e semicondutores em pó de CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 e ZnNb2O6-Nb2O5 construídos e testados na redução fotocatalítica de CO2, com vistas a geração de produtos com maior valor agregado, tal como metanol. Os eletrodos TiO2/Pt e Cu/Cu2O foram construídos por meio de técnicas de eletroquímicas, enquanto que os semicondutores em pó CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 e ZnNb2O6-Nb2O5 foram preparados utilizando a técnica de síntese por combustão e calcinação posterior. A redução fotoeletrocatalítica e fotocatalítica de CO2 não foi satisfatória sobre eletrodos de TiO2/Pt e semicondutor ZnNb2O6-Nb2O5, respectivamente. No entanto, o eletrodo de Cu/Cu2O apresentou grande eficiência na redução de CO2, atingindo 80% de remoção em meio de Na2CO3 0,3 mol L-1 pH 9 a +0,2 V, em solução tampão de NaHCO3/Na2CO3 0,1 mol L-1 pH 8, utilizando luz UV 125 W e potencial de +0,2 V mostrou uma reação praticamente seletiva para metanol, gerando 5,63 mmol L-1, correspondendo a 20% de conversão. Os semicondutores em pó CuNbO3-CuO e Cu0,85Zn0,15Nb2O6 também se mostraram bastante eficientes para a geração de metanol por redução de CO2 dissolvido em Na2CO3 0,1 mol L-1 pH8 utilizando luz visível de 450 W, chegando a formar 7,0 mmol L-1 e 3,2 mmol L-1 de metanol respectivamente. Os resultados obtidos neste trabalho mostram que ambas as técnicas podem ser empregadas para a redução do CO2, usando para isto os semicondutores Cu/Cu2O, CuNbO3-CuO e Cu0,85Zn0,15Nb2O6 e, poderia ser uma potencial alternativa para os problemas ambientais além de contribuir como fonte...
Abstract: This present work reports the main results obtained with the construction and characterization of TiO2 nanotubes modified by platinum nanoparticle electrode (TiO2/Pt) and copper covered by copper oxide nanoparticles electrode (Cu/Cu2O) for application in the photoelectrocatalytic reduction of dissolved CO2 and CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 and ZnNb2O6-Nb2O5 powders semiconductors constructed and applied in the photocatalytic reduction of dissolved CO2 for the generation of products with higher added value. The TiO2/Pt and Cu/Cu2O electrodes were prepared by electrochemical techniques, whereas the CuNbO3-CuO, Cu0,85Zn0,15Nb2O6 and ZnNb2O6-Nb2O5 powder semiconductors were prepared using the combustion synthesis technique and submitted to annealed. The CO2 reduction by photoelectrocatalysis and photocatalysis were not satisfactory when using the TiO2/Pt electrode and the ZnNb2O6-Nb2O5 semiconductor, respectively. However, the Cu/Cu2O electrode shows a high efficiency in the CO2 reduction obtaining 80% of removal in 0.3 mol L-1 Na2CO3 pH 9 and +0.2 V, and, it showed a practically selective reaction to methanol (producing 5.63 mmol L-1), corresponding to 20% of conversion at ambient of 0.1 mol L-1 NaHCO3/Na2CO3 butter solution pH 8, using UV light of 125 W and +0,2 V. The CuNbO3-CuO and Cu0,85Zn0,15Nb2O6 powder semiconductors also showed a good efficiency to the methanol formation throughout dissolved CO2 reduction in 0.1 mol L-1 Na2CO3 pH 8 using visible light of 450 W, and forming 7 mmol L-1 and 3.2 mmol L-1 of methanol, respectively. The results obtained in this work show that both techniques can be employed for the CO2 reduction, using for this the Cu/Cu2O, CuNbO3-CuO and Cu0,85Zn0,15Nb2O6 semiconductors, and it could be a potential alternative to the environmental problems and contribute as raw material source for the production of fuels, for instance.
Mestre

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TROUILLEUX, LIONEL. „Elaboration et etude des proprietes electriques et magnetiques de ceramiques supraconductrices texturees dans les systemes la-sr-cu-o, nd-ce-cu-o et bi-sr-ca-cu-o“. Paris 11, 1991. http://www.theses.fr/1991PA112031.

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Des ceramiques supraconductrices texturees ont ete elaborees par solidification dirigee, dans les systemes la-sr-cu-o, nd-ce-cu-o et bi-sr-ca-cu-o. L'existence d'une transformation eutectique entre la#2##xsr#xcuo#4 (ou nd#2##xce#xcuo#4) et cuo, nous a permis d'obtenir des materiaux biphases a microstructures orientees. Dans le systeme bi-sr-ca-cu-o, des materiaux textures quasiment monophases, constitues de plaquettes supraconductrices orientees parallelement a l'axe de croissance ont ete elabores a partir de compositions voisines de la stchiometrie du compose bi#2sr#2cacu#2o#8. L'etude par diffraction x revele une direction de croissance preferentielle 110 pour la phase supraconductrice dans les trois systemes. Les densites de courant critique jc, evaluees a partir de cycles d'aimantation en utilisant le modele de bean, sont respectivement de 3 10#5, 10#3 et 10#6 a?cm##2 a 4 k pour les composes la#2##xsr#xcuo#4 (x0,14), nd#2##xce#xcuo#4 (x0,17) et bi#2sr#2cacu#2o#8. Une anisotropie jc#a#b/jc#c30 a ete determinee pour les composes la#2##xsr#xcuo#4 et bi#2sr#2cacu#2o#8. Les temperatures de milieu de transition supraconductrice, determinees par des mesures de resistivite, sont respectivement 36 k, 21 k et 92 k pour ces trois composes. Les densites de courant critique jc, determinees par transport selon l'axe de solidification sont de 800 a?cm##2 a 18 k pour la#2##xsr#xcuo#4 et de 3000 a?cm##2 a 77 k pour bi#2sr#2cacu#2o#8. Ces valeurs sont tres superieures a celles obtenues dans des materiaux polycristallins isotropes. Ceci resulte de l'orientation des joints de grains et des plans de conduction (cu-o) de la phase supraconductrice selon l'axe de solidification

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Porch, Adrian. „Microwave surface impedance of YBa₂Cu₃O₇“. Thesis, University of Cambridge, 1992. https://www.repository.cam.ac.uk/handle/1810/283677.

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Teruzzi, Tiziano. „Investigation of the vortex dynamics in the high-temperature superconductors Bi₂Sr₂CaCu₂O₈, YBa₂Cu₃O₇₋{delta} and YBa₂Cu₄O₈ /“. Zürich, 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10361.

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Schorne, Pinto Juliano. „Etude expérimentale et modélisation thermodynamique de systèmes de delafossites à base de cuivre“. Thesis, Toulouse, INPT, 2020. http://www.theses.fr/2020INPT0006.

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Ce travail de thèse multidisciplinaire a été dédié à l’étude des phases CuMO2 avec M = {Cr et Fe} de la famille structurale delafossite. Dans le but principal d’élargir les connaissances et de combler les lacunes autour des propriétés thermodynamiques de ce type de phases, une étude expérimentale approfondie des systèmes Cu-Fe-O et Cu-Cr-O a été menée. Les principaux résultats obtenus sont : a) pour la première fois, une non-stœchiométrie cationique pour la phase delafossite du type CuFe1-yO2- avec y 0.12 a été démontrée, b) les coordonnées du point eutectique du système Cu-Fe-O sous air ont été mesurées à 1049(3) °C pour une composition x(Fe) = 0.105, c) le domaine de stabilité de la phase CuFeO2 sous air est compris entre 1022(2) °C et 1070(2) °C, d) une absence de solution solide à structure delafossite CuCrO2 a été constatée pour les teneurs x(Cr) < 0.50, e) une légère solubilité de chrome dans la phase delafossite avec une valeur maximale de x(Cr) = 0.524(8) a été mesurée dans cette phase, f) la phase spinelle CuCr2O4 est stœchiométrique du fait de l’invariance des paramètres structuraux et de la composition chimique et g) les propriétés thermodynamiques de la phase delafossite CuCrO2 ont été déterminées pour la première fois et les valeurs retenues pour cette phase sont : fH298(CuCrO2) = 670 800 ± 1 400 J/mol, S°298(CuCrO2) = 88.89 J/mol et cp = 102.564 2.872.10-73 128 5421.5 entre [298 < T < 1300]. Ces résultats ont été couplés avec ceux issus de la bibliographie pour la construction d’un modèle thermodynamique générique décrivant les propriétés des phases delafossite, liquide et spinelles dans les sous-systèmes du quaternaire Cu-Cr-Fe-O. La solution liquide a été modélisée par le Modified Quasichemical Model ((Cu1+,Cu2+,Cr1+,Cr2+,Cr3+,Fe1+,Fe2+,Fe3+)(O2-,Va1-)) et les binaires Cu-O et Cr-O ont été réévalués. Une description simplifiée de la solution solide à structure delafossite selon le modèle Compound Energie Formalism a été proposée selon (Cu1+,Cu2+)1 [Cr3+,Fe3+,Cu2+]1 O2 (Va0,O2-)1. Enfin, les systèmes ternaires ont été modélisés par la méthode Calphad, en complétant un modèle existant pour Cu-Fe-O et en établissant un modèle pour Cu-Cr-O. Une projection pour le système quaternaire Cu-Cr-Fe-O a même été proposée
This multidisciplinary thesis work was dedicated to the study of CuMO2 phases with M = {Cr and Fe} of the delafossite structural family. With the main aim of broadening knowledge and filling the gaps around the thermodynamic properties of this type of phase, an in-depth experimental study of the Cu-Fe-O and Cu-Cr-O systems was carried out. The main results obtained are: a) for the first time, a cationic non-stoichiometry for the delafossite phase of the CuFe1-yO2- type with y 0.12 has been found, b) the coordinates of the eutectic point of the Cu-Fe-O system in air were measured at 1049(3) °C for a composition x(Fe) = 0.105, c) the CuFeO2 phase is stable between 1022(2) ° C and 1070(2) ° C in air, d) an absence of solid solution with a delafossite structure CuCrO2 was observed for x (Cr) < 0.50, e) a slight solubility of chromium in CuCrO2 with a maximum value of x (Cr) = 0.524(8) was measured in this phase, f) the spinel phase CuCr2O4 was defined as stoichiometric by the invariance of the structural parameters and the chemical composition, at last g) the thermodynamic properties of the delafossite phase CuCrO2 were determined for the first time, with the selected values for this phase being: fH298(CuCrO2) = 670 800 ± 1400 J / mol, S°298(CuCrO2) = 88.89 J/mol and cp = 102.564 2.872.10-73 128 5421.5 between [298 <1300]. These results were coupled with those from the bibliography for the construction of a generic thermodynamic model describing the properties of the delafossite, liquid, and spinel phases in the quaternary Cu-Cr-Fe-O subsystems. The liquid phase was modeled by the Modified Quasichemical Model ((Cu1+,Cu2+,Cr1+,Cr2+,Cr3+,Fe1+,Fe2+,Fe3+)(O2-,Va1-)) and the binaries Cu-O and Cr-O were re-evaluated . A simplified description of the delafossite solid solution by the Compound Energy Formalism model has been proposed according to (Cu1+,Cu2+)1 [Cr3+,Fe3+,Cu2+]1 O2 (Va0,O2-)1. Finally, the Cu-Fe-O and Cu-Cr-O ternary systems have been modeled by the Calphad method with good experimental agreement. A projection for the Cu-Cr-Fe-O quaternary system has even been proposed

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Apolzan, Mioara. O vară cu Maia. Bucureşti: Cartea Românească, 2012.

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Baykurt, Fakir. Yilanlarin o cu: Roman. Istanbul: Kitabevi, 1985.

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Holban, Anton. Conversaţii cu o moartă. Iaşi: Polirom, 2005.

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Mircea, Dinescu. O beție cu Marx. [Bucharest]: Seara, 1996.

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Hoàng, Nguyen Xuan. Bat cu lúc nào, bat cu o dâu. Midway City, CA: Nhà Xuat Ban Van, 1992.

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Mazilescu, Virgil. O precizie cu adevărat înspăimântătoare. București: Editura Tracus Arte, 2013.

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Stănoiu, Damian. O noapte cu ghinion: Roman. [Bucharest]: Editura Universal Dalsi, 1993.

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Antoniu, Dan. Galaţi: O poveste cu aviatori. Galaţi: Editura Muzeului de Istorie Galaţi, 2015.

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Vasilievici, George. O cameră cu două camere. Constanţa: Editura Tomis, 2006.

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Stănescu, Gabriel. Ultimile dialoguri cu Petre Țuțea: Cu o scrisoare inedită către Emil Cioran și cu o evocare de Ion Papuc. 2. Aufl. [București]: Criterion, 2008.

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Buchteile zum Thema "Cu₂O"

Pardasani, R. T., und P. Pardasani. „Exchange energy of [Cu(salpd–μ–O,O′)(μ–OAc)Cu(μ–MeO)2 Cu(μ–OAc)(sapld–μ–O,O′)Cu]“. In Magnetic Properties of Paramagnetic Compounds, 4893. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-23675-4_4470.

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Macdougall, Jennie, Chris Reid und Larry McGhee. „Implications of the Selectiveness of Cu Chelators on Cu⁰, Cu(I)O and Cu(II)O Powders“. In Solid State Phenomena, 329–32. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-46-9.329.

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Zettl, A., A. Behrooz, G. Briceno, W. N. Creager, M. F. Crommie, S. Hoen und P. Pinsukanjana. „Anisotropic Transport in Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O“. In Mechanisms of High Temperature Superconductivity, 249–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74407-5_26.

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Dem’yanets, L. N., A. B. Bykov und O. K. Mel’nikov. „Growth Of Single Crystals Of La-Sr-Cu-O, Y-Ba-Cu-O, and Bi-Sr-Ca-Cu-O High-Temperature Superconductors“. In Growth of Crystals, 129–48. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2379-6_11.

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Suzuki, Ryosuke O., Petr Bohac und Ludwig J. Gauckler. „Phase Equilibria and Thermodynamics in the Sr-Cu-O and Ca-Cu-O Systems“. In Advances in Superconductivity V, 399–402. Tokyo: Springer Japan, 1993. http://dx.doi.org/10.1007/978-4-431-68305-6_88.

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Kunishige, Atsuhiro, Hiroshi Yoshikawa, Toshihiko Anno, Itsuhiro Fujii, Hiroshi Daimon und Shizuka Yoshii. „Crystal Structure of Sr-Ca-Cu-O: A Comparison Between That of Sr-Ca-Cu-O and of Bi-Sr-Ca-Cu-O“. In Advances in Superconductivity, 787–92. Tokyo: Springer Japan, 1989. http://dx.doi.org/10.1007/978-4-431-68084-0_132.

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Matsuda, Shimpei, Seiji Takeuchi, Atuko Soeta, Takaaki Suzuki, Katsuzo Aihara und TomoichiKamo. „Superconductivity of Tl-Sr-Ca-Cu-O System in Relation to Tl-Ba-Ca-Cu-O and Bi-Sr-Ca-Cu-O Systems“. In Advances in Superconductivity, 803–5. Tokyo: Springer Japan, 1989. http://dx.doi.org/10.1007/978-4-431-68084-0_135.

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Brinkmann, D. „Cu NQR and NMR Studies in Y-Ba-Cu-O Superconductors“. In Springer Series in Solid-State Sciences, 195–200. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-84345-7_36.

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Batlogg, B. „A Comparison Between Bi-O and Cu-O Based Superconductors“. In Mechanisms of High Temperature Superconductivity, 324–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74407-5_33.

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Usui, Toshio, Nobuyuki Sadakata, Yoshimitsu Ikeno, Osamu Kohno und Hiroshi Osanai. „Preparation of High-Tc Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O Superconductors“. In Advances in Superconductivity, 873–77. Tokyo: Springer Japan, 1989. http://dx.doi.org/10.1007/978-4-431-68084-0_147.

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Konferenzberichte zum Thema "Cu₂O"

Lowndes, Douglas H., David P. Norton, J. D. Budai, D. K. Christen, C. E. Klabunde, R. J. Warmack und Stephen J. Pennycook. „Growth and transport properties of Y-Ba-Cu-O/Pr-Ba-Cu-O superlattices“. In Processing Integration, Santa Clara, CA, herausgegeben von Rajendra Singh, Jagdish Narayan und David T. Shaw. SPIE, 1991. http://dx.doi.org/10.1117/12.25741.

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Wasa, K., M. Kitabatake, H. Adachi, K. Setsune und K. Hirochi. „Superconducting Y-Ba-Cu-O and Er-Ba-Cu-O thin films prepared by sputtering deposition“. In AIP Conference Proceedings Volume 165. AIP, 1988. http://dx.doi.org/10.1063/1.37070.

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Setsune, Kentaro, Akihiro Odagawa, Toshifumi Satoh, Hideaki Adachi und Kiyotaka Wasa. „Microstructure and superconductivity of Bi-Sr-Ca-Cu-O/Bi-Sr-Cu-O multilayer thin films“. In OE/LASE '94, herausgegeben von Ivan Bozovic. SPIE, 1994. http://dx.doi.org/10.1117/12.179145.

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Park, Wan K., Su Y. Lee und Zheong G. Khim. „Transport properties of YBa 2 Cu 3 O 7-δ /PrBa 2 Cu 3 O 7-δ“. In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, herausgegeben von Ivan Bozovic und Davor Pavuna. SPIE, 1998. http://dx.doi.org/10.1117/12.332454.

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Shinde, Satish Laxman, Karuna Kar Nanda, Alka B. Garg, R. Mittal und R. Mukhopadhyay. „Synthesis of Porous Cuprous Oxide (Cu[sub 2]O) on Cu Foil“. In SOLID STATE PHYSICS, PROCEEDINGS OF THE 55TH DAE SOLID STATE PHYSICS SYMPOSIUM 2010. AIP, 2011. http://dx.doi.org/10.1063/1.3605912.

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Sun, Lirong, Neil R. Murphy, John G. Jones und John T. Grant. „Optical and structural properties of co-sputtered Cu-Si-O and Cu-Ge-O thin films (Presentation Recording)“. In SPIE Nanoscience + Engineering, herausgegeben von Eva M. Campo, Elizabeth A. Dobisz und Louay A. Eldada. SPIE, 2015. http://dx.doi.org/10.1117/12.2188902.

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Young, M., X.-L. Yang, Y. F. Li, Y. G. Tang, Z. Z. Sheng, G. J. Salamo, R. J. Anderson und F. T. Chan. „Superconducting Tl-Ba-Ca-Cu-O thin films“. In Superconductivity and its applications. AIP, 1992. http://dx.doi.org/10.1063/1.42058.

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Eom, Chang-Beom, Jean-Marc Triscone, Yuri Suzuki und Theodore H. Geballe. „Synthesis and transport properties of a-axis YBa 2 Cu 3 O 7 /PrBa 2 Cu 3 O 7 superlattices“. In Proc Int - DL Tentative, herausgegeben von Rajendra Singh, Martin Nisenoff und Davor Pavuna. SPIE, 1992. http://dx.doi.org/10.1117/12.56679.

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Inam, Arun, Charles T. Rogers, R. Ramesh, K. E. Myers, J. Barner, B. J. Wilkens, K. S. Harshavardhan et al. „Artificially layered YBa 2 Cu 3 O 7 -PrBa 2 Cu 3 O 7 heterostructures; growth, properties, and device applications“. In Proc Int - DL Tentative, herausgegeben von Rajendra Singh, Martin Nisenoff und Davor Pavuna. SPIE, 1992. http://dx.doi.org/10.1117/12.56688.

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Nath, Arpita, Archana Das, Latha Rangan und Alika Khare. „Antibacterial activity of Cu@Cu 2 O nanoparticles synthesized via laser ablation in liquids“. In International Conference on Fiber Optics and Photonics, herausgegeben von Sunil K. Khijwania, Banshi D. Gupta, Bishnu P. Pal und Anurag Sharma. SPIE, 2010. http://dx.doi.org/10.1117/12.899527.

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Berichte der Organisationen zum Thema "Cu₂O"

Wu, H. Processing of R-Ba-Cu-O superconductors. Office of Scientific and Technical Information (OSTI), Februar 1998. http://dx.doi.org/10.2172/658158.

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Moshopoulou, E., J. D. Thompson, J. L. Sarrao und Z. Fisk. Electron diffraction study of La{sub 2}Li{sub O.5}Cu{sub O.5}O{sub 4}. Office of Scientific and Technical Information (OSTI), März 1998. http://dx.doi.org/10.2172/658351.

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Green, Tim M. Synthesis, rheology and forming of Y-Ba-Cu-O ceramics. Office of Scientific and Technical Information (OSTI), Juli 1993. http://dx.doi.org/10.2172/10116330.

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Kircher, J., J. Humlicek, M. Garriga, M. Cardona, D. Fuchs, H. U. Habermeier, Y. Fang, U. Welp, K. Vandervoort und G. Crabtree. Interband transitions in YBa{sub 2}Cu{sub 3}O{sub 7}. Office of Scientific and Technical Information (OSTI), August 1991. http://dx.doi.org/10.2172/10159411.

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Salem-Sugui, S. Jr, Donglu Shi und S. E. McFarland. Enhanced irreversibility by crystal defects in the Bi-Sr-Ca-Cu-O system. Office of Scientific and Technical Information (OSTI), April 1991. http://dx.doi.org/10.2172/10144499.

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Minseo, Park. The relationship of structure to superconductivity in the Pr-Ba-Cu-O system. Office of Scientific and Technical Information (OSTI), Mai 1994. http://dx.doi.org/10.2172/10161809.

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Nekkanti, Rama M., Venkat Seetharaman, Lyle Brunke, Iman Maartense und Dave Dempsey. Development of Nickel Alloy Substrates for Y-Ba-Cu-O Coated Conductor Applications. Fort Belvoir, VA: Defense Technical Information Center, Oktober 2003. http://dx.doi.org/10.21236/ada418688.

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Francavilla, T. L., G. A. Candela, Jr Soulen und R. J. Critical Current Density and Transition Temperature Measurements of Y-Ba-Cu-O Rods. Fort Belvoir, VA: Defense Technical Information Center, Dezember 1989. http://dx.doi.org/10.21236/ada216695.

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Boothroyd, A. T., J. P. Hill, D. F. McMorrow, N. H. Andersen, A. Stunault, C. Vettier und T. Wolf. Incommensurate magnetism in non-superconducting PrBa{sub 2}Cu{sub 3}O{sub 6.92}. Office of Scientific and Technical Information (OSTI), Dezember 1998. http://dx.doi.org/10.2172/307971.

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Mook, H. A., P. Dai, M. E. Mostoller, F. Dogan, K. Salama und G. Aeppli. Neutron scattering measurements on YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}. Office of Scientific and Technical Information (OSTI), Mai 1996. http://dx.doi.org/10.2172/224866.

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