Synthesis and Sintering Behavior of (Ce,Cu)-SnO2 Nanopowders by Polymeric Precursor Methods

Abstract

Abstract: Nanocrystalline SnO₂ powders doped with CeO₂ and CuO were prepared by the polymeric precursors method. XRD, TG-DSC, TEM and SEM techniques were used to characterize the as-prepared powders and the sintered compacts. The molar ratios of citric acid to metallic elements and ethylene glycol to citric acid were 3:1 and 2:1, respectively. The precursors after burning were calcined at 550℃ in air, and spherical, well-dispersed doped SnO₂ powders with an average diameter of ～15nm were obtained. The relative density of 1.0%CeO₂-1.5%CuO-doped SnO₂ ceramics sintered at 1050℃ is over 96%; the 1.5%CuO-doped SnO₂ ceramics can be densified at 1100℃. The grain size of the 1.0%CeO₂-1.5%CuO-doped SnO₂ ceramics densified by tqo-step sintering (first at 1050℃ for 15min, then cooling down to 980℃ and holding for 5h) is smaller than 800nm.

Key words: polymeric precursor method, doped SnO2 nanopowders, CeO₂-CuO, sintering

CLC Number:

TB383

CHEN De-Liang,GAO Lian. Synthesis and Sintering Behavior of (Ce,Cu)-SnO₂ Nanopowders by Polymeric Precursor Methods[J]. Journal of Inorganic Materials.

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Synthesis and Sintering Behavior of (Ce,Cu)-SnO₂ Nanopowders by Polymeric Precursor Methods

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