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Descripción
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| The influence of processing parameters on the phase formation of strontium aluminates doped with Eu2+ and Dy3+ by the combustion method has been evaluated. The addition of a slight excess of urea as a fuel has an important effect on the phase formation, but a larger amount of urea inhibited the strontium incorporation into the stuffed tridymite-like structure. The experimental results show that it is possible to incorporate a larger amount of urea than the theoretical one by adding nitric acid as an oxidizing agent. The presence of an oxidizing agent promotes both effective chelation of the cations and a higher crystalline order on strontium aluminate. Nanostructured lamellar particles have been obtained in a single step and the particles are well crystallized. The combustion method avoids the standard requirements of post-thermal treatments in a reducing atmosphere to promote the appearance of Eu2+ cations. A higher amount of urea in the presence of the oxidizing agent produces strontium aluminate particles with higher phosphorescence brightness, owing to the increase of the reduction process Eu3+ to Eu2+. The luminescence properties correlate with the crystallite size of the strontium aluminate. The results demonstrate a pathway to obtain phosphorescent pigments with sizes down to 10 ?m. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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Rsc Advances |
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ISSN
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20462069 |
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Factor de impacto JCR
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3,708 |
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Información de impacto
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Datos JCR del año 2013 |
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Volumen
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5 |
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DOI
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10.1039/C4RA10460A |
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Número de revista
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Desde la página
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3104 |
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3112 |
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