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Fe 3 O 4 /SiO 2 nanocomposite particles were synthesized from a hydrophobic Fe 3 O 4 suspension, prepared by precipitating Fe (II) and Fe (III) chlorides and using a hydrophobic SiO 2 wet gel from a silicic acid solution derived from a sodium silicate (water glass) solution. Fe 3 O 4 nanoparticles having a crystallite size of ~10nm embedded...
High temperature thermoelectric figure-of-merit of Ca-doped rare-earth cobalt oxides, R 0.9 Ca 0.1 CoO 3 (R=Pr~Gd) were enhanced by substituting the rare-earth element for Ho 3+ , which has smaller ionic radius, indicating that the temperature dependence of thermoelectric figure-of-merit of these Ca 2+ doped rare-earth cobalt oxide...
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