Patent ID: 9284640
Filing Date: 2016-03-15
CPC Classification: C01B,C23C,C25D

Claim Text:
1. A method for producing a graphene layer from a liquid metal matrix on a solid metal or ceramic substrate, wherein a multilayered plate containing, as the graphene forming matrix, an external layer composed of a metal or a metal alloy with a melting point in the range from 1,051° C. and 1,150° C. and, as a support substrate, between 1 and 5 layers made of transition metals and/or their alloys and/or metalloids and/or their solutions and compounds with melting points in the range from 1,151° C. to 3,410° C., is subjected to heat treatment in the following stages: plate heating until the plate reaches a temperature that is between 0.5° C. and 50° C. higher than the melting point of the forming matrix, annealing, at a constant or variable temperature from the temperature range, for a period between 60 and 600 seconds, concurrently supplying the atmosphere with acetylene at a partial pressure of up to 4 hPa, ethylene at a partial pressure of up to 4 hPa and hydrogen at a partial pressure of up to 2 hPa for a period between 10 and 300 seconds, cooling, partially controlled, with the cooling rate maintained between 0.1 and 2° C./min in the temperature range of 1,200° C.-1,050° C., where consecutive stages of heating, annealing and cooling are conducted in the atmosphere of pure argon at a constant partial pressure varying from 1 hPa to 1,100 hPa, wherein the transition metal is selected from the group consisting of platinum, molybdenum, palladium and nickel, and (1) when the transition metal is platinum, the platinum plate, which is at least 0.2 mm thick and coated by electrolysis on one side with a 0.2 mm thick copper layer, is placed in the chamber of a vacuum furnace, at which point, after removing air from the chamber to the vacuum level of 10 (2) when the transition metal is molybdenum, a molybdenum plate with a thickness of 4.5 mm and dimensions of 50×50 mm is coated by magnetron sputtering with a 40 μm thick layer of nickel and then a 1.5 mm thick layer of copper and is placed in the chamber of a vacuum furnace, at which point, after removing air from the chamber to the vacuum level of 10 wherein the metalloid or its compound is silicon or quartz, and when the metalloid or its compound is quartz, a quartz glass plate, which is at least 0.8 mm thick and coated with a 300 nm thick layer of silicon and a 1,000 nm thick layer of copper, is placed in the chamber of a vacuum furnace, at which point, after removing air from the chamber to the vacuum level of 10