凝胶固相反应法制备钪、铈共掺杂氧化锆粉体

Scandium and Cerium Co-doped Zirconia Powder Prepared by a Gelation–Solid State Reaction Method

以Sc2O3、Ce（NO3）3·6H2O和ZrO（NO3）2·xH2O为原料,采用凝胶固相反应法制备氧化钪、氧化铈共掺杂氧化锆（10Sc1CeSZ）粉体。结果表明：800℃煅烧后,10Sc1CeSZ粉体为单一立方萤石结构,比表面积为9.18m2/g,粉体粒度分布均匀,平均颗粒尺寸为100nm,适宜用于流延法制备电解质薄膜。10Sc1CeSZ粉体烧结活性好,采用流延法制备的生坯可在1400～1450℃烧结致密,烧结后仍为单一立方萤石结构。凝胶固相反应法制备10Sc1CeSZ粉体时具有操作简便、烧结活性好、粒度分布均匀等优点,适合用于规模化生产。

Scandia and ceria co-doped zirconia （10Sc1CeSZ） powders were prepared via a gelation-solid state reaction using scandia, cerium nitrate hexahydrate and zirconyl nitrate as starting materials. The results show that the 10Sc1CeSZ powder calcined at 800℃is a pure cubic fluorite structure with the specific surface area of 9.18 m2/g and the average particle size of 100 nm, which is suitable as a starting material for the preparation of electrolyte film in tape casting process. The 10Sc1CeSZ powder showed a superior sin-terability. The green thin film prepared by tape casting which could be densified in the temperature range from 1 400 to 1 450℃ can remain the pure cubic structure. It is convenience and effective to use the gelation-solid state reaction method for the preparation of 10Sc1CeSZ powder with the preferably sintering activity and uniform particle size distribution. This method can be promising for the large-scale production.