Synthesis of La 0.9Sr 0.1Ga 0.8Mg 0.2O 2.85 powder by gel combustion route with two-step doping strategy
2012 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, Vol. 32, no 10, 2325-2331 p.Article in journal (Refereed) Published
A two-step doping strategy was applied to the synthesis of La 0.9Sr 0.1Ga 0.8Mg 0.2O 2.85 (LSGM1020) powder by a gel combustion method. The Mg-doped LaGaO 3 powder was prepared in the first step, and Sr incorporation in the Mg-doped LaGaO 3 powder was done in the second step to obtain the final LSGM1020 powder. The two-step procedure is effective in preparing higher purity powders than the traditional one-step procedure. Rietveld refinement of X-ray powder diffraction (XRD) patterns shows that incorporation of Mg in LaGaO 3 in the first step enlarges the LaGaO 3 lattice: this facilitates the incorporation of Sr in the second doping step and thus high purity powder is obtained. Relatively phase pure LSGM1020 powder with only 3.1% of LaSrGaO 4 was obtained after calcination at 1300°C for 5h. Therefore, the two-step doping strategy is an effective procedure for the preparation of LSGM powders with high Sr- and Mg-doping levels.
Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 32, no 10, 2325-2331 p.
Lanthanum gallate, Perovskite, Powders-chemical preparation, Sol-gel processes, X-ray methods
IdentifiersURN: urn:nbn:se:kth:diva-86998DOI: 10.1016/j.jeurceramsoc.2012.01.033ISI: 000304782600031ScopusID: 2-s2.0-84862793006OAI: oai:DiVA.org:kth-86998DiVA: diva2:501281
QC 201205292012-02-142012-02-142012-07-04Bibliographically approved