{"id":78753,"date":"2018-03-09T23:24:27","date_gmt":"2018-03-09T23:24:27","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/fases-sillen-aurivillius-oxihaluros-de-bismuto-y-metales-de-transicion-wtimnfecu\/"},"modified":"2018-03-09T23:24:27","modified_gmt":"2018-03-09T23:24:27","slug":"fases-sillen-aurivillius-oxihaluros-de-bismuto-y-metales-de-transicion-wtimnfecu","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/estructura-de-los-compuestos-inorganicos\/fases-sillen-aurivillius-oxihaluros-de-bismuto-y-metales-de-transicion-wtimnfecu\/","title":{"rendered":"Fases sill\u00e9n-aurivillius: oxihaluros de bismuto y metales de transici\u00f3n (w,ti,mn,fe,cu)"},"content":{"rendered":"

Tesis doctoral de David \u00e1vila Brande <\/strong><\/h2>\n

El objetivo de este trabajo, ha sido la determinaci\u00f3n estructural a partir de muestras policristalinas y el estudio de la micro y nanoestructura de los nuevos oxihaluros de bisumuto y metales de transici\u00f3n (w,ti,mn,fe,cu) obtenidos. la metodolog\u00eda de trabajo que se ha seguido consta de los siguientes pasos: -s\u00edntesis: optimizaci\u00f3n de las condiciones experimentales (temperatura, necesidad o no de atm\u00f3sferas inertes, tiempo…) Con el fin de obtener muestras monof\u00e1sicas. -an\u00e1lisis composcional: mediante xeds hemos podido determinar la composici\u00f3n cati\u00f3nica media y en todos los compuestos que incorporan c1, dado que su se\u00f1al caracter\u00edstica (kalfa) solapa con una de la se\u00f1al m del bi, el uso de la espectroscopia eels nos ha permitido verificar su presencia. Asimismo, en los compuestos que contienen alg\u00fan cati\u00f3n magn\u00e9tico (mn+3, fe+3, cu+2) las medidas de susceptibilidad, adem\u00e1s de dar informaci\u00f3n acerca de la presencia de alg\u00fan fen\u00f3meno cooperativo, permiten confirmar el estado de oxidaci\u00f3n de los cationes magn\u00e9ticamente activos. Estas medidas han sido fundamentales en el an\u00e1lisis composicional de la fase bi4cu1\/3w2\/3o8-deltac1, puesto que nos indica la presencia de un porcentaje del cati\u00f3n cu+3, de modo que junto con la composici\u00f3n media calculada a partir de xeds podermos determinar el valor de delta = 0.1, -determinaci\u00f3n de la simetr\u00eda, celda unidad y grupo espacial: una vez obtenida la composici\u00f3n media, el estudio del espacio rec\u00edproco mediante saed es fundamental para determinar la homogeneidad de la muestra y obtener la celda unidad. En este trabajo nos hemos encontrado con la dificultad de que los diagramas saed pod\u00edan indexarse en celdas de simetr\u00eda tetragonal u ortorr\u00f3mbica (pseudotetragonal), por lo que el empleo de la micrdifracci\u00f3n y cbed ha sido fundamental para determinar el grupo espacial. As\u00ed como se muestra en la tabla resumen, no todos los compuestos son ortorr\u00f3mbicos de grupo espacial cm2m sino que la f<\/p>\n

 <\/p>\n

Datos acad\u00e9micos de la tesis doctoral \u00abFases sill\u00e9n-aurivillius: oxihaluros de bismuto y metales de transici\u00f3n (w,ti,mn,fe,cu)<\/strong>\u00ab<\/h3>\n
    \n
  • T\u00edtulo de la tesis:<\/strong>\u00a0 Fases sill\u00e9n-aurivillius: oxihaluros de bismuto y metales de transici\u00f3n (w,ti,mn,fe,cu) <\/li>\n
  • Autor:<\/strong>\u00a0 David \u00e1vila Brande <\/li>\n
  • Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n
  • Fecha de lectura de la tesis:<\/strong>\u00a0 17\/02\/2006<\/li>\n<\/ul>\n

     <\/p>\n

    Direcci\u00f3n y tribunal<\/h3>\n
      \n
    • Director de la tesis<\/strong>\n
        \n
      • Luis Carlos Otero D\u00edaz<\/li>\n<\/ul>\n<\/li>\n
      • Tribunal<\/strong>\n
          \n
        • Presidente del tribunal: Miguel Angel Alarios Franco <\/li>\n
        • P\u00e9rez Omil Jos\u00e9 Antonio (vocal)<\/li>\n
        • Reine Wallenderg (vocal)<\/li>\n
        • Pilar Herrero Fernandez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Tesis doctoral de David \u00e1vila Brande El objetivo de este trabajo, ha sido la determinaci\u00f3n estructural a partir de muestras […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[1116,7078],"tags":[169200,21556,6296,20653,169202,169201],"class_list":["post-78753","post","type-post","status-publish","format-standard","hentry","category-estructura-de-los-compuestos-inorganicos","category-tierras-raras","tag-david-avila-brande","tag-luis-carlos-otero-diaz","tag-miguel-angel-alarios-franco","tag-perez-omil-jose-antonio","tag-pilar-herrero-fernandez","tag-reine-wallenderg"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/78753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=78753"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/78753\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=78753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=78753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=78753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}