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Information On The System Number And Properties Of Niobium Carbide

wallpapers Industry 2020-11-13
Niobium carbide, CAS No. 12069-94-2, molecular formula CHNb, molecular weight 105.925, is a gray-brown metallic powder, it needs to be sealed at room temperature, cool and ventilated, and used to produce wear-resistant films and semiconductor films. It can also be used as a raw material for the production of molybdenum carbide. It can be used to manufacture chromium-free special alloys and engineering ceramics.
 
System number
 
CAS Number: 12069-94-2
MDL number: MFCD00016237
EINECS number: 235-117-8
PubChem number: 24861134
 
Computational chemistry data
 
1. Number of hydrogen bond donors: 0
2. Number of hydrogen bond acceptors: 0
3. Number of rotatable chemical bonds: 0
4. Topological molecular polar surface area (TPSA): 0
5. Number of heavy atoms: 2
6. Surface charge: 0
7. Complexity: 0
8. Number of isotopic atoms: 0
9. Determine the number of atomic stereo centers: 0
10. Uncertain number of atomic stereo centers: 0
11. Determine the number of chemical bond stereo centers: 0
12. Uncertain the number of chemical bond stereo centers: 0
13. Number of covalent bond units: 2
 

Nature and stability
 
Stable under normal temperature and pressure.
Materials to avoid Oxidizing. It is insoluble in hot and cold hydrochloric acid, sulfuric acid and nitric acid, but soluble in a mixed solution of hot hydrofluoric acid and nitric acid. It is stable at 1000-1100 ℃, and rapidly oxidized to niobium pentoxide above 1100 ℃. Niobium carbide is easy to melt in titanium carbide, zirconium carbide, tungsten carbide and other compounds, and together form isomorphous solid solution mixtures.
It belongs to the sodium chloride crystal structure, with a lattice constant of 4.471A·(1A·=0.1nm), which is harder than corundum, and its micro-Vickers hardness (load 50g) is 2400kg/mm2. The melting point is also very high, 3490 ℃ [81,82].

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