不同碳酸铵试剂对共沉淀法制备的GDC粉性状的影响  

Effects of the Forms of Ammonium Carbonate on Characteristics of GDC Nanopowders Synthesized via Coprecipitation Route

作　　者：谢朝晖[1] 朱庆山[1] 姚生永[1] 黄文来[1] 

机构地区：[1]中国科学院过程工程研究所,北京100080

出　　处：《无机化学学报》2006年第5期935-940,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家"863"计划(No.2003AA323010)资助项目

摘　　要：Coprecipitation with carbonates is an effective method for synthesis of the doped ceria nanopowder. This study compared the compositions and properties of the Gd2O3-doped CeO2 (GDC) nanopowders resulted by two ammonium carbonates, including a carbonate mixture from China and a pure carbonate reagent from abroad. It was found that the precursors from the two precipitants were same to each other in composition, with a formula (NH4)0.25CeGd0.25(CO3)2·2H2O. However, the GDC nanopowder resulted by the carbonate mixture had smaller particle sizes and thus better sinterability than that resulted by the pure ammonium carbonate reagent.Coprecipitation with carbonates is an effective method for synthesis of the doped ceria nanopowder. This study compared the compositions and properties of the Gd203-doped CeO2 （GDC） nanopowders resulted by two ammonium carbonates, including a carbonate mixture from China and a pure carbonate reagent from abroad. It was found that the precursors from the two precipitants were same to each other in composition, with a formula （NH4）0.25CeGd0.25（CO3）2·2H2O. However, the GDC nanopowder resulted by the carbonate mixture had smaller particle sizes and thus better sinterability than that resulted by the pure ammonium carbonate reagent.

关 键 词：钆掺杂氧化铈 碳酸铵 共沉淀 

分 类 号：O613.71[理学—无机化学] O614.33[理学—化学]