Chemistry of inorganic compounds – Boron or compound thereof – Binary compound
Patent
1995-05-16
1996-12-24
Nguyen, Ngoc-Yen
Chemistry of inorganic compounds
Boron or compound thereof
Binary compound
C01B 3504
Patent
active
055871402
ABSTRACT:
A process of producing a powder of a transition-metal boride includes producing metal boride particles in a molten metal by contacting a molten salt, to which at least one boron compound was added, with the molten metal containing a transition-metallic element selected from the Groups IV and V of the Periodic Table at an atomic ratio of elemental boron to transition-metallic element from 0.5 to 4.0, while maintaining a contact temperature which is not lower than the melting point of the molten metal and which is less than 1000.degree. C., and recovering the particles from the molten metal. According to the present invention, fine powders of the transition-metal boride which contain few agglomerated particles may be easily obtained using relatively inexpensive feed materials, such as the boron oxides, at a low temperature less than 1000.degree. C. without the necessity of a grinding step.
REFERENCES:
patent: 3258316 (1966-06-01), Tepper
patent: 3692479 (1972-09-01), Meadows et al.
patent: 4312848 (1982-01-01), Dawless
patent: 4414188 (1983-11-01), Becker
patent: 4921531 (1990-05-01), Nagle et al.
"Handbook of Chemistry & Physics", 52nd edition, 1971-1972, pp. B-70 to B-76, QD 65 C4 (no month).
Journal of the American Ceramic Society, vol. 67, No. 3, Mar. 1984, pp. 207-212, Baumgartner et al. "Sintering and Properties of Titanium Diboride Made from Powder Synthesized in a Plasma-Arc Heater".
Journal of Materials Science 23, 1988, pp. 288-292, Tsuneaki Matsudaira et al, "Synthesis of TiB.sub.2 powder from a mixture of TiN and amorphous boron".
The Research Report from the Faculty of Engineering, Kanagawa University, UDC: 661.685, vol. 23, Mar. 1985, pp. 37-44, Shigeru Okada et al, "Preparation of TiB.sub.2 Single Crystal in Molten Aluminum Flux and its Properties".
Nippon Kagaku Kaishi (Journal of the Chemical Society of Japan, Chemistry and Industrial Chemistry), No. 8, 1995, pp. 1535-1543, Shigeru Okada et al, "Preparation of NbB.sub.2, TaB and TaB.sub.2 Single Crystals Using Molten Aluminum Flux" (no month).
Metall vol. 42. No. 12, Dec. 1988, pp. 1196-1200, K. Matiasovsky et al., "Electrolytic Deposition of Titanium Diboride--Possible Impact on Aluminum electrolysis" (A copy of p. 1197 is excluded because that page is a advertisement.
Fujiwara Shinji
Tabuchi Hiroshi
Takahashi Akihiko
Nguyen Ngoc-Yen
Sumitomo Chemical Company Limited
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