METHOD OF MANUFACTURING NANOFIBER MATERIAL FOR COLD CATHODES Russian patent published in 2006 - IPC C01B31/02 B82B3/00 H01J1/30 

FIELD: electronic-vacuum engineering.

SUBSTANCE: invention is intended for implementation in manufacture of light sources, indicator lamps, and optic displays. Graphite heater is placed in working volume, into which nitrogen or nitrogen/argon blend (ratio from 1:10 to 1:1) is pumped in at pressure up to 15 MPa and removed. These operations are repeated threefold. Thereafter, above-indicated gas or gas blend is pumped in at pressure 10 to 90 MPa and working volume is heated to 2100-2200 K at velocity 1 to 100 K/min and aged for 10 min to 4 h. Temperature is the lowered to ambient value and then pressure is reduced to atmospheric value at velocity 1 MPa/sec. Resultant nitrogen-carbon nanofibers are withdrawn from working volume, dispersed in ethyl alcohol by means of ultrasonic disperser giving power 180-200 W for 5-15 min, filtered, and applied onto cathodic plate.

EFFECT: enabled manufacture of various-structure nanofibers in large amounts by easy and economic way.

3 cl, 6 dwg, 1 tbl, 7 ex