|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Structural phase transition in the perovskite-type tantalum oxynitrides, Ca[1-x]Eu[x]Ta(O,N)[3]
| Title: | Structural phase transition in the perovskite-type tantalum oxynitrides, Ca[1-x]Eu[x]Ta(O,N)[3] |
| Authors: | Motohashi, Teruki Browse this author →KAKEN DB | | Hamade, Yohei Browse this author | | Masubuchi, Yuji Browse this author →KAKEN DB | | Takeda, Takashi Browse this author | | Murai, Kei-ichiro Browse this author | | Yoshiasa, Akira Browse this author | | Kikkawa, Shinich Browse this author |
| Keywords: | Ceramics | | Chemical synthesis | | Electron diffraction | | X-ray diffraction | | Crystal structure |
| Issue Date: | Sep-2009 |
| Publisher: | Elsevier Ltd. |
| Journal Title: | Materials Research Bulletin |
| Volume: | 44 |
| Issue: | 9 |
| Start Page: | 1899 |
| End Page: | 1905 |
| Publisher DOI: | 10.1016/j.materresbull.2009.05.011 |
| Abstract: | Pure Ca[1-x]Eu[x]Ta(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. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/39289 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 本橋 輝樹
|
