Nanoscale manipulation of pyrochlore: New nanocomposite ionic conductors

被引：136

作者：

Lian, J ^{[1
]}

Wang, LM

Wang, SX

Chen, J

Boatner, LA

Ewing, RC

机构：

[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

[2] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

[3] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.87.145901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ionic conductivity of isometric pyrochlore, ideally A(2)B(2)O(7), is extremely sensitive to disordering of A- and B-site cations and oxygen anion vacancies. We report the first use of ion beam irradiation-induced disordering in Gd2Ti2O7 to produce a strain-free, buried, disordered defect-fluorite layer approximately 12 mn thick within an ordered pyrochlore matrix. This approach provides a new means of creating nanoscale, mixed ionic-electronic conductors in pyrochlore ceramics, such as those required for solid-state electrochemical cells.

引用

页码：145901/1 / 145901/4

页数：4

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