title: Nanoexplosion synthesis of multimetal oxide ceramic nanopowders.
abstract: Herein we demonstrate a unique processing technique for engineering multicomponent ceramic nanopowders with precise morphologies by "nanoblast" calcination/deagglomeration. Multiple "nanoexplosions" of C(3)H(6)N(6)O(6) nanoparticles embedded in preliminary engineered nanoreactors break apart the agglomerates because of the highly energetic impacts of the blast waves. Also, the solid-solubility of one component into the other is enhanced by the extremely high local temperature generated during the nanoexplosions. We applied this technique to produce nanosized agglomerate-free ceria-gadolinia solid solution powder with an average aggregate size of 42 nm. The described method opens the door to the synthesis of a wide range of multimetal oxide ceramic and metal-ceramic composite nanopowders, with precise stoichiometries and uniform morphologies.
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. oleg.vasylkiv@nims.go.jp
authors.forename: Oleg
authors.initials: O
authors.lastname: Vasylkiv
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Sakka
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004735:Energy Transfer; D006358:Hot Temperature; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D011208:Powders
chemical_list: D008670:Metals; D010087:Oxides; D011208:Powders