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Título: | Ceria doped alumina by spark plasma sintering for optical applications |
Autor: | Álvarez-Clemares, I. CSIC; Mata-Osoro, G. CSIC; Fernández, Adolfo CSIC ORCID; López-Esteban, Sonia CSIC ORCID; Pecharromán, Carlos CSIC ORCID CVN ; Torrecillas, Ramón CSIC ORCID CVN; Moya, J. S. CSIC | Fecha de publicación: | 2012 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 32(11): 2917-2924 (2012) | Resumen: | Al 2O 3-CeO 2 ceramics were found to be transparent in the IR range and high-traslucent in the visible range. The surface of nanometric α-alumina particles was modified by deposition-precipitation of small fractions of ceria nanoparticles. The powders were sintered using Spark Plasma Sintering. Values of Real In-line Transmittance up to 70% in the IR-Vis range have been measured. Transparency enhancement has been attributed to Cerium oxide nanoparticles located at the grain boundaries and triple points. These particles are hindering alumina grain growth during SPS at a temperature as high as 1430°C. This effect is found to be effective under SPS low vacuum conditions and short dwell times. The optimum ceria content was found to be 0.7wt.%. Diffusion in Al 2O 3-CeO 2 as a function of the atmosphere has been studied in diffusion couples. The results obtained by the proposed route are discussed considering the data reported in the literature for SPS ed transparent alumina. © 2012 Elsevier Ltd. | Descripción: | El pdf del artículo es el manuscrito de autor. | Versión del editor: | http://dx.doi.org/10.1016/j.jeurceramsoc.2012.02.037 | URI: | http://hdl.handle.net/10261/66032 | DOI: | 10.1016/j.jeurceramsoc.2012.02.037 | Identificadores: | doi: 10.1016/j.jeurceramsoc.2012.02.037 issn: 0955-2219 |
Aparece en las colecciones: | (ICMM) Artículos (CINN) Artículos |
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CERIA DOPED.pdf | 336,63 kB | Adobe PDF | Visualizar/Abrir |
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