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Synthesis of perovskite-type oxynitrides SrNb(O,N)(3) and CaTa(O,N)(3) using carbon nitride
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| Title: | Synthesis of perovskite-type oxynitrides SrNb(O,N)(3) and CaTa(O,N)(3) using carbon nitride |
| Authors: | Yang, Qian Browse this author | | Masubuchi, Yuji Browse this author →KAKEN DB | | Higuchi, Mikio Browse this author →KAKEN DB |
| Keywords: | Perovskite | | Oxynitrides | | Carbon nitride | | Powder processing |
| Issue Date: | 15-Jun-2020 |
| Publisher: | Elsevier |
| Journal Title: | Ceramics international |
| Volume: | 46 |
| Issue: | 9 |
| Start Page: | 13941 |
| End Page: | 13944 |
| Publisher DOI: | 10.1016/j.ceramint.2020.02.191 |
| Abstract: | The synthesis of oxynitride perovskites based on the use of gaseous ammonia as the nitrogen source requires high reaction temperatures and long durations. In the resent work, reduction and nitridation reactions using carbon nitride (C3N4) were employed to prepare SrNbO2N and CaTaO2N from their oxide precursors, without the use of ammonia. The phase evolution behaviors and the reaction mechanisms were investigated by acquiring thermogravimetric and X-ray diffraction data. The formation of metal cyanamide as an intermediate was found to be vital to realizing low-temperature synthesis of these compounds. Scanning electron microscopy observations also indicated that the particle sizes of the oxynitrides prepared using C3N4 were smaller than those obtained by ammonolysis reactions, due to the low formation temperature of 800 degrees C associated with the present C3N4 process. |
| Rights: | © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/84434 |
| 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)
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Submitter: 鱒渕 友治
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