Nb2o5 Films
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Chemical Stability and Crystallographic Analysis of the the Sr2HoNbO6 Cubic Perovskite as Potential Substrate for YBa2Cu3O7-δ Superconducting Films
The Sr2HoNbO6 complex perovskite has been synthesized by solid-state reaction. X-ray diffraction pattern reveals that Sr2HoNbO6 material crystallizes in a cubic structure, Fm3̅m space group, lattice constant a=8.018 Å, which has a lattice mismatch ~3% with YBa2Cu3O7-δ. The chemical stability of Sr2HoNbO6 with YBa2Cu3O7-δ superconducting has been studied
Mat. Res.. Publicado em: 07/07/2016
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2. Aplicação de espectroscopia de fotoelétrons ao estudo de processos de corrosão e oxidação de superfícies metálicas: Inconel 182, Fe/Cu(100) e U-Zr-Nb / Aplicação de espectroscopia de fotoelétrons ao estudo de processos de corrosão e oxidação de superfícies metálicas: Inconel 182, Fe/Cu(100) e U-Zr-Nb
In this work a study of the oxidation/corrosion process of three systems of metallic materials by Photoemission Spectroscopy is presented. In the first system, it was investigated the corrosion of Inconel 182 at simulated Pressurized Water Reactor (PWR) environment. Samples with and without surface chemical treatment were exposed to the simulated environment
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/05/2011
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3. Preparation and characterization of sol gel Nb2O5:Zr thin films / Preparação e caracterização de filmes finos sol-gel de Nb2O5:Zr
Este trabalho apresenta resultados da preparação e caracterização de filmes finos de pentóxido de nióbio (Nb2O5) dopados com isopropóxido de zircônio (IV) Zr[O(CH2)2CH3]4, obtidos via processo sol-gel. A adição do precursor dopante teve como finalidade estudar a sua influência sobre as propriedades eletroquímicas destes filmes. Os sóis destinado
Publicado em: 2009
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4. APLICAÇÃO DE MOLÉCULAS AUTO-ORGANIZÁVEIS (SAM) EM FILMES FINOS DE SnO2 / APPLICATION OF SELF ASSEMBLED MOLECULES (SAM) IN THIN FILMS SnO2
Thin films of tin dioxide (SnO2) with the addition of doping are widely used because its various applications, so develop a search on this subject is of great value technology, since many different forms of doping, formulation and preparation, can be made and modified, intended to improve this material according to their physical and chemical properties. Thi
Publicado em: 2008
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5. Production and charactization of doped Ti-Pt/β-PbO2 electrodes and their use in the electrochemical treatment of simulated wastewaters / Produção e caracterização de eletrodos de Ti-Pt/PbO2 dopados e seu uso no tratamento eletroquímico de efluentes simulados
Ti-Pt/PbO2 electrodes were obtained by electrodeposition of PbO2 films at 65 C and with different dopant(s) (Fe, Co, F, Fe and F, Co and F) contents in the oxide matrix, which were controlled under pre-established and optimized conditions (current densities as well as concentrations of the dopant ions in the electrodeposition baths). Tafel curves in 0.5 mol
Publicado em: 2006
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6. "Electrochromic devices with solid polymeric electrolytes based on starch" / "Dispositivos eletrocrômicos com eletrólitos sólidos poliméricos à base de amido"
This dissertation presents the results of preparation and characterization of five electrochromic devices (DEC) composed of thin films of transition metal oxides, such as WO3, WO3:Ta, Nb2O5:Mo and NiOx as electrochromic layers and CeO2-TiO2 as a transparent counter-electrode. The electrolytes used in these devices were starch-based plasticized with glycerol
Publicado em: 2006
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7. Electrochromic Properties of Sol-gel Coating of Nb2O5 and Nb2O5:Li+
Thin solid films of Nb2O5 and Nb2O5:Li+ were prepared by the sol-gel process using the sonocatalytic method. The films reported here were prepared from a NbCl5 as precursor and butanol as solvent. Through the addition of lithium salt LiCF3SO3 to the precursor solution, films with different electrochemical performance were obtained. The electrochemical and op
Materials Research. Publicado em: 2002-03
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8. Estrategias para obtenção de precursores unicos para a deposição de Nb2O5 ZrO2 e CuO por deposição quimica de vapor por metalorganicos
The aims of this work were to propose and study precursors for low pressure chemical vapor deposition of metal oxides thin films of niobium, zirconium and copper to be used in the electronic industry. This work describes the synthesis and characterization of four new precursors for MOCVD: [Nb(OPr)5]2 (2.1), [Nb(OPr)5(HOPr)] (2.2), [{Zr(HOBu)2(HFTB)2}(HOBu)]
Publicado em: 2002
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9. Investigation of the oxide phase formation and study of microstructure and morphology influence on Electrochromic properties of Nb2O5 thin films. / Investigação da formação da fase óxido e estudo da influência da microestrutura e morfologia nas propriedades eletrocrômicas de filmes finos de Nb2O5.
O Nb2O5 é conhecido por sua capacidade de variação da absorção ótica, que ocorre em função de um duplo processo de redução e intercalação de íons pequenos, como o Li+. Neste trabalho, filmes eletrocrômicos de Nb2O5 foram produzidos através do método de Pechini e depositados por dip- coating. Inicialmente o efeito das variáveis de composiçã
Publicado em: 2002
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10. Structural characterization and ferroelectric properties of strontium barium niobate (Sr xBa1-xNb2O6) thin films
Strontium barium niobate (SBN) thin films of good quality were deposited on Pt/Ti/SiO2/Si substrate using a polymeric resin containing metallic ions. Films were crystallized at different temperatures and for different duration of time. The structure of these films was studied using X-ray diffraction. The coexistence of SrNb2O6 (SN) and SBN was observed in fi
Materials Research. Publicado em: 2001
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11. Preparation and characterization of thin films of Nb2O5 doped with Li+ for possible architecture applications. / Preparação e caracterização de filmes finos sol-gel de Nb2O5 dopados com Li+ visando possível aplicação em arquitetura.
O presente trabalho consiste na preparação e caracterização de filmes finos de óxido nióbio (Nb2O5) dopados com trifluoro metano sulfonato de lítio (CF3SO3Li). A adição do sal de lítio tem como objetivo verificar a influência do mesmo nas performances opto-eletroquímicas dos filmes de óxido de nióbio. Os sóis para deposição dos filmes foram
Publicado em: 2001