DEVICE FOR PRODUCTION OF CARBON NANOPIPES USING A METHOD OF ARC-DISCHARGE Russian patent published in 2004 - IPC

FIELD: chemical and electronic industries. SUBSTANCE: the invention presents a device for production of carbon nanopipes using a method of arc-discharge. The method may be used in chemical industry and electronics and in manufacture of accumulators of hydrogen and ultrafine electron-beam tubes. Between the cathode 9 and the anode 7 feed a potential difference in an aerosphere of noble gas is applied. Then cathode 9 and the anode 7 are moved towards each other with obtaining an electric arc in a clearance between them. Motion of the cathode 9 and the anode 7 is executed by rods 3 and 14. The cathode 9 and the anode 7 are isolated from the rods 3 and 14 by ceramic screw nuts 4 and 13. The current contact jaws are made i plump sliding and are composed of the fixed graphitic bushes 5 and 10 and mobile graphitized electrodes 6 and 12. Anode 7 is evaporated, the carbon nanopipes are located in the middle of the solid cathode deposit, that is shaped as acylindrical rod. The invention allows to ensure a reliable electric contact over the whole surface of the electrodes, to increase the current strength up to 600 A and to decrease the current density down to 25 A/cm sq in places of the sliding contact. The multiple-loop system of a water cooling is expelled, necessity of water-cooled shields is removed, the design becomes simpler. Reliability of the device operation is increased due to exclusion of an arc discharge origination between the rods. EFFECT: the device does not need a complex water cooling system, its design is simplified and reliability increased. 2 dwg