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12136-78-6
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???(??):
?????????;?????????(????????);?????????(????????)(MOLYBDENUMDISILICIDE)
???:
Molybdenum silicide
???(??):
MOLYBDENUM DISILICIDE;MOSI2 B;MOSI2 C;MOLYBDENUM SILICIDE;Molybdenum disiticide;molybdenum(IV) silicide;Molybdenum silicide MoSi2;Molybdenum silicide/ 99.5%;MOSI2 A MOLYBDENUM SILICIDE;MOLYBDENUM SILICIDE, Mo5Si3
CBNumber:
CB3263947
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MoSi2
??? ??:
152.11
MOL ??:
12136-78-6.mol
MSDS ??:
SDS

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1930°C
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6.31 g/mL at 25 °C(lit.)
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insoluble in H2O; soluble in HF
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Specific Gravity
6.31
???
21.5 (ρ/μΩ.cm)
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?? ???? ???? ??? HF? HNO?? ?????.{3}??? ??????? ?????. ???? ?? ?? ???? ????.
????
45.187 W/(m·K)
??
Cp(crystal): 0.61 J/(g·K), at 25℃
Crystal Structure
Tetragonal
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ACGIH: TWA 10 mg/m3; TWA 3 mg/m3
NIOSH: IDLH 5000 mg/m3
InChI
InChI=1S/Mo.Si2/c;1-2/q+2;-2
InChIKey
OVVBPJHTRZEJHC-UHFFFAOYSA-N
SMILES
[Si-]#[Si-].[Mo+2]
EPA
Molybdenum silicide (MoSi2) (12136-78-6)
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  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
??? ?? Xn
?? ???? ?? 20/21/22
????? 36
WGK ?? 3
TSCA TSCA listed
???? ??? 11 - Combustible Solids
???? ?? KE-25438
????(GHS): Exclamation Mark (GHS07)
?? ?: Warning
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H302 ??? ??? ?? ?? ?? - ?? ?? 4 ?? P264, P270, P301+P312, P330, P501
H312 ??? ???? ??? ?? ?? ?? - ?? ?? 4 ?? P280,P302+P352, P312, P322, P363,P501
H332 ???? ??? ?? ?? ?? ?? ?? 4 ?? P261, P271, P304+P340, P312
??????:
P261 ??·?·??·???·??·...·????? ??? ????.
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P270 ? ??? ??? ??? ???, ???? ???? ???.
P271 ?? ?? ??? ? ?? ???? ?????.
P280 ????/???/???/?????? ?????.
P301+P312 ??? ???? ??? ????(??)? ??? ????.
P302+P352 ??? ??? ??? ?? ????.
P304+P340 ???? ??? ??? ?? ??? ??? ???? ?? ??? ??? ????.
P312 ???? ??? ????(??)? ??? ????.
P322 ?? ??(??? … ??)
P330 ?? ?????.
P363 ?? ??? ??? ??? ?????.
P501 ...? ??? / ??? ?? ???.
NFPA 704
0
0 0

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Molybdenum silicide is dark-gray, crystalline powder. Not affected by air upto 1648°C. Not attacked by most inorganic acidsincluding aqua regia, but very soluble in hydrofluo-ric and nitric acids. Has high stress-rupture strength.

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The compound is thermally stable in air up to 1000°C. Corrosion resistant to molten metals such as Zn, Pd, Ag, Bi, and Rb. Corroded by liquid metals Mg, Al, Si, V, Cr, Mn, Fe, Ni, Cu, Mo, and Ce.

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MOLYBDENUM SILICIDE can be considered as an electrically conducting ceramic with primary use in heating elements operating at temperatures above 1,500℃ in air. It is also considered as a material for very high temperature structural applications.

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MOLYBDENUM SILICIDE is A cermet.

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This product has been enhanced for energy efficiency.

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MOLYBDENUM SILICIDE is Toxic material.

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High-temperature silicides are a new class of materials with potential applications in the temperature range 1200 to 1600 C.The silicide that seems most promising is molybdenum disilicide (MoSi2) because of its high melting temperature (2200 C) and excellent oxidation resistance. It has a tetragonal crystal structure. A major problem is its absence of ductility at temperatures up to 1000 C. It also has poor high-temperature strength due to the presence of a grain boundary silicon-rich phase that may become viscous at very high temperatures. Recent research has shown that this problem may be solved by the addition of carbon to the material.

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