Download file (7.73MB)
Download as zip (7.47MB)

コレクション

引用

説明:

In this work, we report a rapid synthesis method for polycrystalline transition-metal tetraborides using reactive spark plasma sintering (R-SPS). This method was demonstrated on the synthesis of single-phase manganese tetraboride (MnB4) in a short time, 30 minutes. Starting powders with variable B/Mn molar ratios (4.1, 4.5, 5.0, and 8.0) were subjected to 12 h of high-energy ball milling (HEBM), followed by synthesis and consolidation in a single step using R-SPS in a dynamic vacuum atmosphere. Phase purity was confirmed by powder X-ray diffraction (PXRD); single-phase MnB4 was obtained for B/Mn molar ratio of 4.5 and higher in the temperature range of 850 – 1080°C, while the lower B/Mn molar ratio (4.1) resulted in a mixed-phase (Mn3B4 + MnB4) sample. The crystal structure and lattice parameters estimated from PXRD agree well to those reported for single-crystal MnB4. Thermogravimetric differential thermal analysis (TG/DTA) revealed that MnB4 is stable in air up to 400°C.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: borides

刊行年月日: 2025-03-11

出版者: Elsevier BV

掲載誌:

• Open Ceramics (ISSN: 26665395) vol. 22 100764

研究助成金:

• Japan Society for the Promotion of Science
• Japan Science and Technology Agency
• JST-Mirai Program JPMJMI19A1

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.oceram.2025.100764

関連資料:

その他の識別子:

連絡先:

更新時刻: 2025-11-10 12:30:32 +0900

MDRでの公開時刻: 2025-11-10 12:24:29 +0900