{"id":587,"date":"2011-10-25T12:04:56","date_gmt":"2011-10-25T10:04:56","guid":{"rendered":"http:\/\/www.icmm.csic.es\/Nanocarma\/?p=587"},"modified":"2011-10-25T12:04:56","modified_gmt":"2011-10-25T10:04:56","slug":"nanopowders-of-ferroic-oxides-for-magnetoelectric-composites","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/nanocarma\/?p=587","title":{"rendered":"Nanopowders of ferroic oxides for magnetoelectric composites"},"content":{"rendered":"

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TEM images, quantitative particle size distribution analysis, and SAED patterns indexed as NiFe2O4 spinel of the a mechanosynthesized powder and b after a thermal treatment at 800C<\/p><\/div><\/p>\n

Piezoelectric oxides are currently being considered in combination with magnetic materials for the development of magnetoelectric composites, in which stress transfer across the interface is a key issue. In this context, we report here a detailed study of the mechanochemical activation processes of the ferroelectric perovskite BiScO3\u2013PbTiO3 and of the ferrimagnetic spinel NiFe2O4. Highly sinterable, single-phase nanopowders of both ferroic oxides are synthesised, and used for the reparation of highdensity materials and two-phase composites by hot pressing. Emphasis is put on studying chemical reactions at and interdiffusion across the interface between the two phases using high spatial resolution techniques such as micro X-ray diffraction and piezoresponse force microscopy. The feasibility of preparing magnetoelectric composites by this approach is demonstrated, for which the necessity of controlling physicochemical processes at the interface is key to obtain functionality.<\/p>\n

H. Amor\u00edn, T. Hungr\u00eda, A. R. Landa-C\u00e1novas, M. Torres, M. Doll\u00e9, M. Alguero & A. Castro; \u00abNanopowders of ferroic oxides for magnetoelectric composites\u00bb J. Nanopart. Res.<\/em> (2011) 13:4189\u20134200. DOI 10.1007\/s11051-011-0363-6<\/a><\/p>\n

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Im\u00e1genes TEM, an\u00e1lisis de la distribuci\u00f3n de tama\u00f1os de part\u00edcula, y diagramas SAED indexados en la fase espinela NiFe2O4 de (a) un polvo mecanosintetizado y (b) despu\u00e9s de un tratamiento t\u00e9rmico a 800C<\/p><\/div>\n

Los \u00f3xidos piezoelectricos, en combinaci\u00f3n con materiales magn\u00e9ticos, son materiales de actualidad considerados para el desarrollo de composites magnetoel\u00e9ctricos, en los que la transferencia de stress a trav\u00e9s de la intercara es un punto clave. En este contexto, informamos aqu\u00ed de un detallado estudio de los procesos de activaci\u00f3n mecanomec\u00e1nica de la perovskita ferroel\u00e9ctrica BiScO3\u2013PbTiO3 y de la espinela ferrimagn\u00e9tica NiFe2O4. Nanopolvos monofase altamente sinterizables han sido sintetizados y usados en la preparaci\u00f3n de materiales de alta densidad y composites de dos fases por \u00abhot pressing\u00bb. Se ha hecho \u00e9nfasis en el estudio de las reacciones qu\u00edmicas y en la interdifusi\u00f3n a trav\u00e9s de la intercara entre dos fases usando t\u00e9cnicas de alta resoluci\u00f3n espacial como micro-difracci\u00f3n de rayos X y microscop\u00eda de fuerzas de piezorespuesta. Se ha demostrado la viabilidad de la preaparaci\u00f3n de composites magnetoel\u00e9ctricos por este m\u00e9todo, para lo cual es clave la necesidad de controlar los procesos f\u00edsico-qu\u00edmicos en la intercara para obtener la funcionalidad.<\/p>\n

<\/a>H. Amor\u00edn, T. Hungr\u00eda, A. R. Landa-C\u00e1novas, M. Torres, M. Doll\u00e9, M. Alguero & A. Castro; \u00abNanopowders of ferroic oxides for magnetoelectric composites\u00bb J. Nanopart. Res.<\/em> (2011) 13:4189\u20134200. DOI 10.1007\/s11051-011-0363-6<\/a><\/p>\n

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

Piezoelectric oxides are currently being considered in combination with magnetic materials for the development of magnetoelectric composites, in which stress transfer across the interface is a key issue. In this context, we report here a detailed study of the mechanochemical … Sigue leyendo →<\/span><\/a><\/p>\n","protected":false},"author":68,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[16],"tags":[31,38],"class_list":["post-587","post","type-post","status-publish","format-standard","hentry","category-publications","tag-hrtem","tag-oxide"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/587","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/users\/68"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=587"}],"version-history":[{"count":0,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/587\/revisions"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}