BaCoO3基透氧材料的B位掺杂优化

doi:10.3969/j.issn.1007-2861.2011

上海大学学报(自然科学版) ›› 2011, Vol. 17 ›› Issue (1): 7-12.doi: 10.3969/j.issn.1007-2861.2011

• 上海市现代冶金与材料制备重点实验室专栏 • 上一篇下一篇

BaCoO₃基透氧材料的B位掺杂优化

刘旭，丁伟中，沈培俊，刘蛟，王海海，耿振

（上海大学上海市现代冶金与材料制备重点实验室，上海 200072）

收稿日期:2010-11-22 出版日期:2011-02-28 发布日期:2011-02-28
通讯作者: 丁伟中（1952~）,男，教授，博士生导师，博士，研究方向为氢气制备与新材料开发. E-mail:wzhding@shu.edu.cn
基金资助:
国家高技术研究发展计划（863计划）资助项目（2006AA11A89）；上海市科委重点研究资助项目（07DZ12036，08DZ12064）

Optimization of BaCoO₃ Based Perovskite by B-Site Compositional Tailoring

LIU Xu, DING Wei-zhong, SHEN Pei-jun, LIU Jiao, WANG Hai-hai, GENG Zhen

(Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, China)

Received:2010-11-22 Online:2011-02-28 Published:2011-02-28

摘要/Abstract

摘要：

采用传统的固相合成法制备BaCo_0.9-xFe_xNb_0.1O3-δ(BC0.9-xFxN0.1O, x=0.1,0.2,0.3,0.4)和BaCo_1-yNb_yO_3-δ(BC_1-yN_yO,y=0.10,0.12,0.14,0.16)混合导体透氧膜材料，较系统地研究Fe和Nb掺杂量对BC_0.9-xF_xN_0.1O和BC_1-yN_yO的晶体结构、晶粒大小、结构稳定性以及透氧率的影响.结果表明：Fe和Nb掺杂有助于提高BaCoO₃基钙钛矿材料的结构稳定性，但会降低材料的透氧能力；与Fe相比，Nb掺杂能够更有效地提高材料的高温化学稳定性，并细化晶粒；厚度为1 mm的BaCo_0.88Nb_0.12O_3-δ膜片在850 ℃和Air/He（110 mL·min^-1/80 mL·min^-1）的吹扫条件下，透氧率为2.02 mL·cm-²·min^-1.

关键词: 透氧膜；结构稳定性；化学稳定性；晶粒细化；透氧率

Abstract:

BaCo0.9-xFexNb0.1O3-δ(BC0.9-xFxN0.1O, x=0.1,0.2,0.3,0.4) and BaCo1-yNbyO3-δ(BC1-yNyO,y=0.10,0.12,0.14,0.16) were prepared in a conventional solid state reaction process. The influence of iron and niobium doping level on crystal structure, grain size, structural stability, and oxygen permeation of BC0.9-xFxN0.1O and BC1-yNyO compounds was investigated systematically. Increase of iron and niobium doping content resulted in the increase of the structural stability of oxides and the decrease of oxygen flux. The niobium doping level in oxides could enhance stability and refine the grain size of compounds more effectively than Fe. The oxygen flux of BaCo0.88Nb0.12O3-δ with 1 mm thickness reaches 2.02 mL·cm-2·min-1 at 850 ℃ under air/helium condition.

Key words: oxygen-permeation membrane; structural stability; chemical stability; grain refinement; oxygen permeation

中图分类号:

TQ 031

刘旭，丁伟中，沈培俊，刘蛟，王海海，耿振. BaCoO₃基透氧材料的B位掺杂优化[J]. 上海大学学报(自然科学版), 2011, 17(1): 7-12.

LIU Xu, DING Wei-zhong, SHEN Pei-jun, LIU Jiao, WANG Hai-hai, GENG Zhen. Optimization of BaCoO₃ Based Perovskite by B-Site Compositional Tailoring[J]. Journal of Shanghai University（Natural Science Edition）, 2011, 17(1): 7-12.

BaCoO₃基透氧材料的B位掺杂优化

Optimization of BaCoO₃ Based Perovskite by B-Site Compositional Tailoring

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