offers a list of grades of niobium powder:
The substance is a small particle of niobium of various shapes. T
powder. Technical conditions. " This niobium material is obtained from molten metal. By chemical composition, the powder is divided into grades, and by
glanulometric composition it is divided into classes, which can be only four - I, II, III, IV. PNB-1 powder is classified as class I and is used for the manufacture of capacitors. The grain size for each class is different from each other. So, for niobium powder of the first class, a grain size of 40-63 microns is characteristic, and for the second class 10-63 microns. For the powder of the third class, 10-40 μm, and the powder of the fourth class has a grain size of 40-1000 μm. Moreover, there are different limit deviations for each class and each grain size in microns and in percent. The specific surface is also different for classes.Chemical compositionNiobium powder contains certain impurities, the presence and quantity of which are clearly regulated by GOST and are prescribed in table 2 of the above standard. The amount of impurity depends on the brand of niobium powder, and the presence of one or another element also depends on the brand. The
powder contains eighteen elements: tantalum, titanium, silicon, iron, tungsten, molybdenum, nitrogen, carbon, oxygen, hydrogen, nickel, aluminum, magnesium,
manganese, cobalt, tin, copper, zirconium.
● Due to its throughput and oxidizing properties, niobium powder is used in electrical engineering: it is used to make foil included in the design of electrolytic capacitors.
● Another area of its application is the production of compact alloys.
● Various capacitors are made from powder.
● It also makes various semi-finished products, including rods, wire, ingots, sheets, tapes and foil.
● Widely used in metallurgy, electrovacuum technology.
● Using niobium powder, special alloys are alloyed.
According to the standard, the powder should not have any extraneous inclusions and inclusions. Particles are considered fragmentary in shape. Its main
positive properties are good ductility and lightness. In addition to these chemical properties, niobium powder is also characterized by corrosion
resistance and refractoriness. It conducts electricity well and has good heat resistance. Due to these qualities, the powder is used for alloying special alloys. In terms of physical properties, niobium is very similar to tungsten, but niobium is considered a more plastic and lighter substance. It is also considered cheaper than tungsten powder and therefore niobium replaces it in many industries..