DEVICE FOR PRODUCING NANOCRYSTALLINE EPSILON OF IRON OXIDE PHASE Russian patent published in 2021 - IPC C01G49/06 C30B30/02 C30B29/16 B82B3/00 B82Y40/00 

FIELD: materials science and nanotechnology.

SUBSTANCE: invention relates to the field of materials science and nanotechnology using a device for producing nanocrystalline epsilon phase of iron oxide Fe₂O₃, which can be used in hydrogen energy and magnetic recording media. The device contains a coaxial magnetoplasma accelerator, in which the cylindrical electrically conductive barrel 1 is made of steel, and the central electrode consists of a steel tip 2 and a shank 3 of steel, the barrel 1 and the central electrode are electrically connected by a fusible bridge 4 in the form of a conductive carbon layer applied to the surface of the insulator separating the electrically conductive barrel 1 from the central electrode, the body 6 of the accelerator is made of magnetic material, the length of the part of the body overlapping the area of the fusible link 4 is 40-50 mm, and its outer surface is made conical, the solenoid 7 of the accelerator is made in one piece with the flange 8 and the cylindrical part 9, in which it is located body 6, reinforced with a threaded plug 10 and a strong fiberglass body 11, and pulled together by powerful conductive pins 12 between the flange 8 and the fiberglass thrust ring 13, the conductive pins 12 are electrically connected by a conductive ring 14, the first busbar 15 of the external power supply circuit is connected to the conductive pins 12, and the second busbar 16 of the power supply circuit is connected to the shank 3, four capacitor banks 17, 19, 21, 23 with a capacity of each 7.2 mF, the second terminal of each of the capacitor banks is connected to the first terminal of the corresponding key 18, 20, 22, 24, the second terminals of the keys are connected to the second busbar 16, and the control terminals of the keys 18, 20, 22, 24 are connected to the control unit 25, the free end of the accelerator barrel inserted into the main cylindrical chamber 26, bounded by the side covers 27, 32, through an axial hole in the first side cover 27 and hermetically fixed by means of O-rings 28 located between the flange 8 and the first side cover 27, and pins 29 connecting the ring 30, abutting into the flange 8, and the first side cover 27, the main cylindrical chamber 26 through the first valve 31 is connected to a cylinder filled with oxygen and equipped with a pressure gauge, a cylindrical buffer chamber 37, the volume of which is limited by the third and fourth side covers 39, 41, through the second valve 40 is connected to the foreline pump, the inlet of the bypass valve 38 is inserted into the axial hole of the second side cover 32, the outlet of which is inserted into the axial hole of the third side cover 39, while a copper coil 33 is spirally wound on the outer surface of the main cylindrical chamber 26, the ends of which are connected through valves to a liquid cryothermostat 34, and the main chamber 26 is equipped with a temperature sensor 36 and outside, together with a spirally wound coil 33, the first 27 and second 32 side covers, is thermally insulated.

EFFECT: invention allows obtaining products with a content of nanocrystalline epsilon phase of iron oxide from 93.0 to 97.0 wt. % with an average particle size of 51.8 to 35.7 nm.

1 cl, 3 dwg, 1 tbl