CARBON-CONTAINING NANOMATERIAL WITH LOW THRESHOLD OF FIELD ELECTRON EMISSION AND METHOD OF ITS PRODUCTION (VERSIONS) Russian patent published in 2011 - IPC H01J1/304 H01J9/02 

FIELD: electricity.

SUBSTANCE: carbon-containing nanomaterial with low field electron emission threshold (LFEET) represents a disperse powder with particle size of less than 50 mcm, consisting of a nucleus and a surface layer, at the same time the nucleus is formed of dielectric (DE) or semi-conductor (SC) material, and a surface layer of graphite-like carbon (GLC) with thickness of 0.5-50 nm. The methods to produce nanomaterial (versions) are realised in the following manner: 1. Powders of DE or SP material are thermally treated in the medium of carbohydrates at the temperature that exceeds temperature of their thermal decay, during the time required to produce a layer of GLC on surface of powder particles with thickness of 0.5-50 nm. 2. Powders of diamond are thermally treated in the inert medium or vacuum at the temperature that exceeds temperature of diamond transition into graphite, during the time required to produce a layer of GLC on surface of diamond particles with thickness of 0.5-50 nm. 3. Powders of covalent or metal-like carbides are thermally treated in chlorine at the temperature that exceeds temperature of their interaction with chlorine to form gaseous chlorides and carbon, during the time required to produce a layer of GLC on surface of powder particles with thickness of 0.5-50 nm.

EFFECT: production of disperse materials with low field electron emission threshold and simplified technology of their manufacturing.

8 cl, 1 dwg