Synthesis of La9.33Si6O26 Pore–Solid Nanoarchitectures via Epoxide-Driven Sol–Gel Chemistry


  • This work was supported in part by the U.S. Office of Naval Research. S. C. received an education training grant from the Université de Toulouse, EDF, and ADEME; K. A. P. is an NRC-NRL Postdoctoral Associate (2004–2007).


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A sol–gel-based strategy for the production of mesoporous, nanostructured, single-phase La9.33Si6O26 apatite in an aerogel-type framework is reported (see Figure). The crystallization temperature of these nanoarchitectures is low (800 °C), thus preventing detrimental particle growth. This morphology allows sintering to dense ceramics at lower temperatures relative to other nanocrystalline forms, which is advantageous for the application of these materials as electrolytes in solid-oxide fuel cells.