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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
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
Type: article (author version)
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: 鱒渕 友治

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