{"id":64042,"date":"2018-03-09T22:52:00","date_gmt":"2018-03-09T22:52:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesis-y-caracterizacion-de-nitruro-haluros-superconductores-de-circonio-y-hafnio\/"},"modified":"2018-03-09T22:52:00","modified_gmt":"2018-03-09T22:52:00","slug":"sa%c2%adntesis-y-caracterizacion-de-nitruro-haluros-superconductores-de-circonio-y-hafnio","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/sa%c2%adntesis-y-caracterizacion-de-nitruro-haluros-superconductores-de-circonio-y-hafnio\/","title":{"rendered":"S\u00edntesis y caracterizaci\u00f3n de nitruro haluros superconductores de circonio y hafnio."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Judith Or\u00f3 Sol\u00e9 <\/strong><\/h2>\n<p>Los nitruro haluros de circonio y hafnio presentan una estructura laminar, isot\u00edpica a smsi, que permite la inserci\u00f3n de metales alcalinos. En este trabajo se ha llevado a cabo la intercalaci\u00f3n de litio y sodio por v\u00eda qu\u00edmica mediante tratamiento en disoluciones de naftil sodio y butil litio, y por v\u00eda electroqu\u00edmica. Las muestras obtenidas mediante intercalaci\u00f3n qu\u00edmica son superconductoras, con valores de temperatura cr\u00edtica de hasta 24 k, y la estructura de los intercalatos es isot\u00edpica a yof. Los intercalatos de nitruro cloruro de hafnio presentan mayores grados de dopaje y temperaturas cr\u00edticas m\u00e1s elevadas, superiores a 18 k, que los derivados de circonio, que presentan superconductividad por debajo de 13.5 k.  la capacidad de intercalaci\u00f3n electroqu\u00edmica de litio de la red anfitriona hfncl est\u00e1 relacionada con la presencia de ox\u00edgeno, que podr\u00eda ocupar las posiciones del nitr\u00f3geno para formar disoluciones s\u00f3lidas. Las muestras que contienen m\u00e1s ox\u00edgeno presentan menor capacidad de intercalaci\u00f3n electroqu\u00edmica, as\u00ed como defectos de apilamiento que dificultan la difusi\u00f3n de la especie hu\u00e9sped en los gaps de van der waals. Mediante molienda de las redes anfitrionas tambi\u00e9n es posible crear defectos de apilamiento que disminuyen la capacidad de intercalaci\u00f3n electroqu\u00edmica. Las diferentes muestras de los compuestos zrncl y zrnbr presentan capacidades electroqu\u00edmicas similares, y menores que las del compuesto hfncl. Las capacidades de intercalaci\u00f3n electroqu\u00edmica de litio est\u00e1n correlacionadas con los grados de dopaje obtenidos mediante intercalaci\u00f3n qu\u00edmica. Las curvas de potencial en funci\u00f3n del grado de intercalaci\u00f3n electroqu\u00edmico muestran zonas de potencial variable, caracter\u00edsticas de disoluciones s\u00f3lidas, y zonas de potencial constante en las que coexisten dos fases en equilibrio. Asimismo se observa cointercalaci\u00f3n de mol\u00e9culas de disolvente en los casos en que \u00e9ste es suficientemente polar (carbonato de propil<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>S\u00edntesis y caracterizaci\u00f3n de nitruro haluros superconductores de circonio y hafnio.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 S\u00edntesis y caracterizaci\u00f3n de nitruro haluros superconductores de circonio y hafnio. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Judith Or\u00f3 Sol\u00e9 <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/04\/2008<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Amparo Fuertes Miquel<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: lLuis Escriche Martinez <\/li>\n<li>gerard Ferey (vocal)<\/li>\n<li>teofilo Rojo aparicio (vocal)<\/li>\n<li>claude Delmas (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Judith Or\u00f3 Sol\u00e9 Los nitruro haluros de circonio y hafnio presentan una estructura laminar, isot\u00edpica a smsi, [&hellip;]<\/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 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