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聚合物前驱体法制备(Ce,Cu)-SnO2纳米粉体及其烧结行为

陈德良; 高濂   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室, 上海 200050
  • 收稿日期:2002-12-18 修回日期:2003-01-16 出版日期:2004-01-20 网络出版日期:2004-01-20

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

CHEN De-Liang; GAO Lian   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Insititute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2002-12-18 Revised:2003-01-16 Published:2004-01-20 Online:2004-01-20

摘要: 采用聚合物前驱体法制备了CeO2-CuO—doped SnO2纳米粉体,并研究了掺杂SnO2纳米粉体的无压烧结行为.结果表明:乙二醇、柠檬酸与金属离子的摩尔比为6∶3∶1时制得的掺杂SnO2粉体为分散良好的球形颗粒,大小为~15nm,粒度分布范围窄;CuO掺杂可显著提高SnO2的烧结性能, CeO2-CuO复合掺杂可进一步降低SnO2陶瓷的致密化温度;1.O%CeO2-1.5%CuO-doped SnO2可在1050℃烧结致密,相对密度达96%以上;两步法(先升温到1050℃保温15min,然后降到980℃烧结5h)烧结的1.O%CeO2-1.5%CuO-doped SnO2陶瓷相对密度为96.1%,其晶粒<800nm.

关键词: 聚合物前驱体法, 掺杂SnO2纳米粉体, CeO2-CuO, 烧结

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

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