Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1491001 | Materials Research Bulletin | 2009 | 7 Pages |
Abstract
Pure Ca1−xEuxTa(O,N)3 were successfully synthesized in the whole range of Ca/Eu compositions by means of ammonia nitridation via a citrate precursor route. As-nitrided products with x < 0.4 were apparently orthorhombic, while those with x ≥ 0.4 crystallized in a cubic structure. The anionic composition was found to be essentially O2N and independent of Eu content (x). The as-nitrided EuTaO2N possessed a cubic perovskite-type structure, while high-temperature post-annealing led to a tetragonal EuTaO2N phase with better crystallinity. The re-nitridation transformed the post-annealed product into the original cubic lattice, which might be an average of the tetragonal micro-domains.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Teruki Motohashi, Yohei Hamade, Yuji Masubuchi, Takashi Takeda, Kei-ichiro Murai, Akira Yoshiasa, Shinich Kikkawa,