Low-temperature synthesis and characterization of apatite-type lanthanum silicates

authors	Kharlamova, T; Pavlova, S; Sadykov, V; Lapina, O; Khabibulin, D; Krieger, T; Zaikovskii, V; Ishchenko, A; Salanov, A; Muzykantov, V; Mezentseva, N; Chaikina, M; Uvarov, N; Frade, J; Argirusis, C
nationality	International
journal	SOLID STATE IONICS
author keywords	lanthanum silicate; apatite; synthesis; conductivity; oxygen mobility
keywords	OXYGEN
abstract	Al- and Sr-doped apatite-type lanthanum silicates (ATLS) have been prepared using mechanochemical activation (MA) and Pechini (Pe) methods, with some structural and electrical properties of doped samples being studied. MA provides ATLS formation already at room temperature after 20-35 min activation. Synthesis via Pe route occurs through the solid state reaction mechanism. MA of carbonate precursors obtained via Pe method results in the fort-nation of a single-phase ATLS after annealing at 900 degrees C. For Al-doped apatite samples fort-nation of LaAlO3 as a secondary phase is observed at high substitution levels depending on the sample stoichiometry, which affects properties of ceramics obtained. (c) 2008 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE BV
issn	0167-2738
year published	2008
volume	179
issue	21-26
beginning page	1018
ending page	1023
digital object identifier (doi)	10.1016/j.ssi.2008.01.028
web of science category	Chemistry, Physical; Physics, Condensed Matter
subject category	Chemistry; Physics
unique article identifier	WOS:000259269100060