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- 1600°C
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- 7480 (ρ/kg.m–3)
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- refractory hexagonal, hexane crystals, crystalline
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- 25–55 (ρ/μΩ.cm)
- Crystal Structure
- Trigonal
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| ????? | 22-24/25 | ||
|---|---|---|---|
| ?? | mouse,LD50,intraperitoneal,1377mg/kg (1377mg/kg),LIVER: OTHER CHANGES,Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 9(6), Pg. 40, 1965. | ||
| ???? ?? | KE-11909 |
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refractory material; borides used as a braze to join molybdenum, tungsten, and tantalum, and niobium parts for electronic, corrosion, and abrasion protection, used as a sputtering target with 99.5% purity to produce films which may be wear-resistant and semiconducting [CER91] [HAW93] [KIR78]??? ??
Corroded by molten metals Al, Mg, V, Cr, Mn, Fe, Ni, Cu, Nb, Mo, and Ta; corrosion resistant to molten Cd, Sn, Bi, and Rb??
Brazes to join molybdenum, tungsten, tanta-lum, and niobium parts, especially electronic com-ponents, corrosion and abrasion-resistant parts, cut-ting tools, refractory cermets.Safety Profile
Poison by intratracheal route. Moderately toxic by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic fumes of boron and Mo.???????? ?? ?? ? ???
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