Niobium powder is used as an alloying additive to steel to give them the necessary physical and mechanical properties. To modify the increase in corrosion resistance of aluminum alloys. In titanium alloys to increase strength and corrosion resistance. For the production of superhard alloys. For the production of superconductors. As an additive to some alloys to increase the electrical conductivity, thermal conductivity. For the manufacture of chemically resistant equipment. As a catalyst.
NbP-a niobium powder is the cleanest, the proportion of impurities does not exceed 0.282%. The proportion of impurities in the powder brand NbP-b reaches 0.357%, and in the brand NbP – 0.354%. At the same time, in powder of NbP-b brand there is less impurities of silicon and carbon, more oxygen and hydrogen. Technical-grade niobium powder produced according to specifications, contains up to 1.5% of impurities.
Niobium is used in the manufacture of chemical equipment, electron-vacuum devices and for the production of various corrosion-resistant alloys
|Powder type||Impurities not more than, (%)|
|NbP-a||Ta – 0,06; (Ti, Ni, Mg, Mn, Co, Sn, Zr) each by – 0,001;( Si, Fe, W, Mo, Cu) each by -0,003; (Al, H) each by – 0,002; C – 0,005; O – 0,2|
|Total amount of impurities ≤ 0,282 (%)|
|NbP-b||Ta – 0,1; (Ti, Ni, Mg, Mn, Co, Sn, Zr) – each by 0,001; Al – 0,002; (Si, Fe, Cu) – each by 0,003; (W, Mo) – each by 0,005; (H, C) – each by 0,01; O – 0,2|
|Total amount of impurities ≤ 0,357 (%)|
|NbP||Ta – 0,12; Ti – 0,004; (Si, Fe, W, Mo) – each by 0,01; C – 0,02; O – 0,15|
|Total amount of impurities ≤ 0,354 (%)|
Density of the powder – 8.57 g/cm3
Based on the size of the granules, niobium powder is divided into 4 classes. The smallest grains of niobium powder belong to class III, their size ranges from 10 to 40 microns. Grains of powder class II have a size of 10-63 microns. The powder of the first class consists of grains with a size of 40-63 microns. The largest grain in powder class IV – from 40 to 1000 microns.
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