868 resultados para Export-oriented industrialization
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Processing of the YMn2O5 powder is very challenging, since it decomposes to YMnO3 and Mn3O4 at temperatures close to 1180 °C, while samples consolidation commonly demands high temperatures. The main goal of this work is to investigate a possibility to prepare thick films of YMn2O5, since their deposition generally requires significantly lower temperatures. Multiferroic YMn 2O5 was synthesized by the hydrothermal method from Y(CH3COO)3·xH2O, Mn(CH 3COO)2·4H2O and KMnO4 precursors. XRD, FE-SEM and TEM analysis showed that the obtained powder was monophasic, with orthorhombic crystal structure and columnar particle shape with mean diameter and length of around 20 and 50 nm, respectively. The obtained powder was suspended in isopropyl alcohol with addition of appropriate binder and deflocculant. This suspension was used for electrophoretic deposition of YMn2O5 thick films under the high-voltage conditions and electric fields ranging from 250 to 2125 V/cm. The films obtained at 1000 V/cm and higher electric fields showed good adhesion, particle packing, homogeneity and very low porosity. It was shown that the deposition in extremely high electric fields (KC=2125 V/cm) can influence the crystal orientation of the films, resulting in formation of preferentially oriented films. © 2012 Elsevier Ltd and Techna Group S.r.l.
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Esboza los trazos principales de interpretacion del proceso de industrializacion desde la decada de los anos 30 hasta el presente. Aborda el tema central de la transformacion del modelo hasta ahora predominante de industrializacion. Propone una estrategia industrial basada en el crecimiento hacia adentro, mediante la creacion de industrias de bienes de capital y de consumo masivo, la continuacion del proceso de sustitucion selectiva de importaciones, el establecimiento de criterios claros de division del trabajo dentro de la region, y la aplicacion de una politica selectiva y dinamica de insercion en los mercados de los paises centrales.
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Examina algunos aspectos que debieran ser considerados al preparar una nueva estrategia de industrializacion que permita hacer frente a los desequilibrios externos y encarar la situacion internacional previsible para los proximos anos.