Modified polyol-mediated synthesis and consolidation of Gd-doped ceria nanoparticles

作者：Wang Shizhong; Chen Shushu; Navrotsky Alexandra; Martin Manfred; Kim Sangtae; Munir Zuhair A^*

来源：Solid State Ionics, 2010, 181(8-10): 372-378.

DOI：10.1016/j.ssi.2010.01.021

• Ceria
• Synthesis
• Nanopowder
• Consolidation
• Spark plasma sintering

A modification of the polyol-mediated synthesis method was developed to synthesize nanostructured gadolinia-doped ceria. Ce(0.9)Gd(0.1)O(2-x). The oxide prepared by this method had uniform grains with a size of about 2 nm. The work demonstrated the critical role of water in the synthesis. A yield of up to 81% can be achieved. The as-synthesized Ce(0.9)Gd(0.1)O(2-x) nanoparticles are crystalline with a cubic fluorite type structure. The nanopowders were subsequently consolidated by a modified pulse electric current sintering (PECS) method to produce dense samples with an average size below 16 nm and a relative density of about 96%. The dense material is composed of isolated particles instead of agglomerates and provides an ideal sample for investigation of the size effect on the conductivity.

• 出版日期2010-3-29