TY - JOUR
T1 - Preparation of faceted TaN grains by heating Ta-containing oxides in BN crucible with Na
AU - Kuge, Naoya
AU - Sekiya, Toru
AU - Enoki, Masanori
AU - Yamane, Hisanori
AU - Yamada, Takahiro
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP20K21231. The authors would like to thank Takashi Kamaya (Tohoku University) for assistance with the SEM and EPMA measurements.
Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP20K21231 . The authors would like to thank Takashi Kamaya (Tohoku University) for assistance with the SEM and EPMA measurements.
Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.
PY - 2022/4/15
Y1 - 2022/4/15
N2 - Single-crystal grains of TaN were synthesized by heating Ta2O5, FeTa2O6, or FeTaO4 in 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 columnar ε-TaN single crystals 10–150 μm in size were formed on the inner wall of the BN crucible when either Ta2O5 or FeTa2O6 was used. On the other hand, platelet-like single crystals of θ-TaN 1–50 μm in size were obtained from FeTaO4. The results of wavelength-dispersive X-ray spectrometry indicated that the compositions of the ε-TaN and θ-TaN crystals were close to the stoichiometric ideal.
AB - Single-crystal grains of TaN were synthesized by heating Ta2O5, FeTa2O6, or FeTaO4 in 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 columnar ε-TaN single crystals 10–150 μm in size were formed on the inner wall of the BN crucible when either Ta2O5 or FeTa2O6 was used. On the other hand, platelet-like single crystals of θ-TaN 1–50 μm in size were obtained from FeTaO4. The results of wavelength-dispersive X-ray spectrometry indicated that the compositions of the ε-TaN and θ-TaN crystals were close to the stoichiometric ideal.
KW - Nitrides
KW - Powders: chemical preparation
KW - Solid nitrogen source
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U2 - 10.1016/j.ceramint.2021.12.297
DO - 10.1016/j.ceramint.2021.12.297
M3 - Article
AN - SCOPUS:85122640005
SN - 0272-8842
VL - 48
SP - 10817
EP - 10820
JO - Ceramics International
JF - Ceramics International
IS - 8
ER -