Preparation of faceted TaN grains by heating Ta-containing oxides in BN crucible with Na
Preparation of faceted TaN grains by heating Ta-containing oxides in BN crucible with Na
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DOI：
10.1016/j.ceramint.2021.12.297
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发表时间：
2021-12
影响因子：
5.2
通讯作者：
Naoya Kuge;T. Sekiya;M. Enoki;H. Yamane;Takahiro Yamada
中科院分区：
文献类型：
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作者：
Naoya Kuge;T. Sekiya;M. Enoki;H. Yamane;Takahiro Yamada
通过在1100 °C下在Ar气氛中在BN坩埚中将Ta 2 O 5、FeTa 2 O 6或FeTaO 4与Na金属一起加热来合成TaN的单晶颗粒。BN坩埚充当氮的固体源。当使用Ta_2O_5或FeTa_2O_6时，在BN坩埚内壁上形成尺寸为10-150 μm的柱状ε-TaN单晶聚集体。另一方面，从FeTaO 4中获得了尺寸为1-50 μm的片状θ-TaN单晶。波长色散X射线光谱分析结果表明，ε-TaN和θ-TaN晶体的成分接近理想化学计量比。
Single-crystal grains of TaN were synthesized by heating Ta2O5, FeTa2O6, or FeTaO4in a BN crucible together with Na metal in an Ar atmosphere at 1100 °C. The BN crucible acted a solid source of nitrogen. Aggregates of columnarε-TaN single crystals 10–150 μm in size were formed on the inner wall of the BN crucible when either Ta2O5or FeTa2O6was used. On the other hand, platelet-like single crystals ofθ-TaN 1–50 μm in size were obtained from FeTaO4. The results of wavelength-dispersive X-ray spectrometry indicated that the compositions of theε-TaN andθ-TaN crystals were close to the stoichiometric ideal.