Synthesis of La0.9Sr0.1Ga0.8Mg0.2O2.85 powder by gel combustion route with two-step doping strategy

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Without internal affiliation

  • Author: Lapina, Alberto

    KTH - Royal Institute of Technology

  • Author: Li, Shuai

    Stockholm University, Sweden

  • Author: Bergman, Bill

    KTH - Royal Institute of Technology, Sweden

  • Author: Zhao, Zhe

    KTH - Royal Institute of Technology, Sweden

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A two-step doping strategy was applied to the synthesis of La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM1020) powder by a gel combustion method. The Mg-doped LaGaO3 powder was prepared in the first step, and Sr incorporation in the Mg-doped LaGaO3 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 LaGaO3 in the first step enlarges the LaGaO3 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 LaSrGaO4 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.
Original languageEnglish
JournalJournal of the European Ceramic Society
Issue number10
Pages (from-to)2325-2331
StatePublished - 2012
Externally publishedYes
CitationsWeb of Science® Times Cited: 4
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ID: 12791439