Combustion Synthesis of Nanometric Powders of LaPO4 and Sr-Substituted LaPO4

Autor:	J. R. Jurado, S. Gallini, María T. Colomer
Rok vydání:	2005
Předmět:	Materials science Hydrogen General Chemical Engineering Inorganic chemistry Sintering chemistry.chemical_element General Chemistry Partial pressure Electrolyte Conductivity Combustion chemistry visual_art Materials Chemistry visual_art.visual_art_medium Ceramic Solid solution
Zdroj:	Chemistry of Materials. 17:4154-4161
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm047945q
Popis:	La(1-x)Sr(x)PO4 materials are very stable at high temperature and water vapor partial pressure and they show protonic conductivity; thus, they could be used as electrolytes in HTPFCs (high-temperature protonic fuel cells), hydrogen sensors, and hydrogen separation technology. This work describes the combustion synthesis of La(1-x)Sr(x)PO4 powders (x = 0, 0.025, 0.050) from mixtures of La(NO3)3·6H2O and Sr(NO3)2 as cation precursors, (NH4)2HPO4 as anion precursor, and urea as fuel. The characterization of the as-prepared combustion products showed that combustion synthesis provides a straightforward method for the achievement of solid solutions of these materials as nanometric powders. Furthermore, dilatometric studies reveal that dense ceramics can be obtained at low sintering temperature (1300 °C), in air, from the synthesized nanometric powders.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b3a232e93af19545202e8f237edc417 https://doi.org/10.1021/cm047945q Zobrazit plný text záznamu