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Colloidal Processing and Characterization of Aluminum-Doped Lanthanum Oxyapatite, La10AlSi5O26.5

2010; Wiley; Volume: 94; Issue: 1 Linguagem: Inglês

10.1111/j.1551-2916.2010.04074.x

1551-2916

Isabel Santacruz, José M. Porras‐Vázquez, Enrique R. Losilla, Marı́a Isabel Nieto, Rodrigo Moreno, Miguel Á. G. Aranda,

Magnetic and transport properties of perovskites and related materials

Journal of the American Ceramic SocietyVolume 94, Issue 1 p. 117-123 Colloidal Processing and Characterization of Aluminum-Doped Lanthanum Oxyapatite, La10AlSi5O26.5 Isabel Santacruz, Corresponding Author Isabel Santacruz Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, Spain†Author to whom correspondence should be addressed. e-mail: [email protected]Search for more papers by this authorJosé M. Porras-Vázquez, José M. Porras-Vázquez Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, SpainSearch for more papers by this authorEnrique R. Losilla, Enrique R. Losilla Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, SpainSearch for more papers by this authorM. Isabel Nieto, M. Isabel Nieto Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, SpainSearch for more papers by this authorRodrigo Moreno, Rodrigo Moreno Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, SpainSearch for more papers by this authorMiguel A.G. Aranda, Miguel A.G. Aranda Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, SpainSearch for more papers by this author Isabel Santacruz, Corresponding Author Isabel Santacruz Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, Spain†Author to whom correspondence should be addressed. e-mail: [email protected]Search for more papers by this authorJosé M. Porras-Vázquez, José M. Porras-Vázquez Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, SpainSearch for more papers by this authorEnrique R. Losilla, Enrique R. Losilla Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, SpainSearch for more papers by this authorM. Isabel Nieto, M. Isabel Nieto Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, SpainSearch for more papers by this authorRodrigo Moreno, Rodrigo Moreno Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, SpainSearch for more papers by this authorMiguel A.G. Aranda, Miguel A.G. Aranda Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, SpainSearch for more papers by this author First published: 02 November 2010 https://doi.org/10.1111/j.1551-2916.2010.04074.xCitations: 12 T. Gur—contributing editor This work was supported by the Spanish Ministry of Science and Innovation and Spanish Ministry of Education through project MAT2009-07016, Ramón y Cajal fellowship (RYC-2008-03523), and AP2005-2462 studentship. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Lanthanum apatite is one of the most promising materials as electrolytes for intermediate-temperature solid oxide fuel cells (IT-SOFC), those operating close to 700°C. The complexity of microstructures, composition, and geometries of SOFC devices, make it necessary to have a precise control of processing parameters to obtain the desired combination of properties. This work involves the preparation and optimization of La10AlSi5O26.5 materials by reaction sintering of the raw materials (La2O3, Al2O3, and SiO2) to be used as IT-SOFCs electrolytes. Homogeneous mixed suspensions of those ceramic oxides were prepared. A heterocoagulation process was followed for ensuring a better reactivity during sintering. All the parameters involved in the process, such as deflocculant content, particle size of the initial powders, sonication time of the mixed suspensions, compaction, and sintering cycle were optimized. The effect of all these parameters were studied and discussed. Finally, La10AlSi5O26.5 electrolytes with density values of ∼88% of the theoretical density and total conductivities of 1.7 × 10−2 S/cm at 700°C were obtained. This study opens a path for the preparation of concentrated suspensions for obtaining dense thin films. Citing Literature Volume94, Issue1January 2011Pages 117-123 RelatedInformation