METHOD OF MANUFACTURING LOW-DENSITY MATERIALS AND LOW-DENSITY MATERIAL Russian patent published in 2014 - IPC C01B31/04 C04B35/536 

FIELD: chemistry.

SUBSTANCE: first, particles of thermally expanded graphite are obtained by heating particles of hydrolysed graphite nitrate with specific melt energy equal or higher than 4.7 kJ/g in the atmosphere of products of combustion of liquid or gaseous fuel in air with the coefficient of air excess counted per fuel λ=0.8-1.1. Obtained thermally expanded graphite is compacted to the seeming density from 0.03 to 0.1 g/cm³ by rolling or uniaxial pressing. After that, the material is cut into measured blanks. At least, two measured blanks are subjected to joint compression with obtaining a monolith material. The finished low-density material is made in the form of long-measuring product up to 1500 mm wide.

EFFECT: invention makes it possible to obtain the low-density heat-conducting material, possessing high bending strength and elasticity modulus and characterised by the absence of acidic corrosion-active additives.

10 cl, 3 ex