凝胶固相反应法制备钪、铈共掺杂氧化锆粉体_中国硅酸盐学会 - 精品期刊
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凝胶固相反应法制备钪、铈共掺杂氧化锆粉体
2013-11-14 | 编辑:enablesite | 【

雷  泽,杜孟衣,韩敏芳
(中国矿业大学(北京)化学与环境工程学院,煤气化燃料电池研究中心,北京 100083)

摘  要: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9.18 m2/g,粉体粒度分布均匀,平均颗粒尺寸为100 nm,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1 400~1 450 ℃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。

关键词:氧化锆;氧化钪;共掺杂;凝胶固相反应法
中图分类号:TQ174.1    文献标志码:A    文章编号:0454–5648(2013)09–1169–06
网络出版时间:2013–08–29  11:49:04    网络出版地址:http://www.cnki.net/kcms/detail/11.2310.TQ.20130829.1149.001.html

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

LEI Ze,DU Mengyi,HAN Minfang
(Research Center of Fuel Cell on Coal Gasification, School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China)

Abstract: 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 sinterability. 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.

Key words: zirconia; scandia; co-doping; gelation–solid state reaction method

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