Synthesis of Structurally Defined Ta3N5 Particles by Flux-Assisted Nitridation

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• 作者：Tsuyoshi Takata ; Daling Lu ; Kazunari Domen
• 刊名：Crystal Growth & Design
• 出版年：2011
• 出版时间：January 5, 2011
• 年：2011
• 卷：11
• 期：1
• 页码：33-38
• 全文大小：904K
• 年卷期：v.11,no.1(January 5, 2011)
• ISSN：1528-7505

文摘

The synthesis of a transition metal nitride, Ta₃N₅, was studied. Morphological changes of Ta₃N₅ particles, depending on the synthetic method, starting materials, and nitridation conditions, were examined in detail. Flux-assisted nitridation was found to be a facile one-step route to a metal nitride with morphological control of the resulting particles. Scanning electron microscopy (SEM) observation revealed that morphologically defined particles of Ta₃N₅ were obtained using Zn, NaCl, or Na₂CO₃ as a flux. Flux-assisted nitridation of TaCl₅ with Zn or NaCl produced nearly monodisperse fine particles larger than a few tens of nanometers. The size of these particles could be controlled by variation of the nitridation temperature. Highly crystallized Ta₃N₅ particles with a rectangular parallelepiped shape were produced from TaCl₅鈭扤aCl or Ta₂O₅鈭扤a₂CO₃ mixtures by nitridation above 1123 K, because of the annealing effect of the flux.