Author/Authors :
Kharlamova، نويسنده , , S. P. Andreev and T. V. Pavlova ، نويسنده , , S. and Sadykov، نويسنده , , V. and Lapina، نويسنده , , O. and Khabibulin، نويسنده , , D. and Krieger، نويسنده , , T. and Zaikovskii، نويسنده , , Andrii V. and Ishchenko، نويسنده , , A. and Salanov، نويسنده , , A. V. Muzykantov، نويسنده , , V. and Mezentseva، نويسنده , , N. and Chaikina، نويسنده , , M. and Uvarov، نويسنده , , N. and Frade، نويسنده , , J. and Argirusis، نويسنده , , Chr.، نويسنده ,
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 formation of a single-phase ATLS after annealing at 900 °C. For Al-doped apatite samples formation of LaAlO3 as a secondary phase is observed at high substitution levels depending on the sample stoichiometry, which affects properties of ceramics obtained.
Keywords :
Lanthanum silicate , Synthesis , Conductivity , Oxygen mobility , apatite
