Acceptor doped BiFeO3 ceramics:: A new material for oxygen permeation membranes

被引：33

作者：

Brinkman, Kyle

Iijima, Takashi

Takamura, Hitoshi

机构：

[1] Natl Inst Adv Ind Sci & Technol AIST, Res Ctr Hydrogen Ind Use & Storage, Tsukuba, Ibaraki 3058565, Japan

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2007年 / 46卷 / 4-7期

关键词：

ionic conduction; oxygen separation membrane; point defects; ceramics; PHASE-STRUCTURE; PERFORMANCE;

D O I：

10.1143/JJAP.46.L93

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new intermediate temperature mixed conducting material has been fabricated based on acceptor doping of bismuth ferrite (BiFeO3). Acceptor doping at levels of 5 mol % with either Ca or Sr was found to increase the maximum operating temperature of ceramics by more than 100 degrees C as well as eliminate secondary phase formation often reported in the pure BiFeO3 system. Mixed ionic and electronic conductivity was confirmed by measuring the oxygen permeation properties of doped ceramics which exhibited flux's on the order of 0.018 mu mol/(cm(2)s) at 800 degrees C over the oxygen partial pressure range 0.21 atm (air) to 10(-6) atm (He). Ceramic membranes showed an increase in oxygen flux with decreasing sample thickness indicating good surface catalysis properties of the system.

引用

页码：L93 / L96

页数：4

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