Graphene Institute

Graphene powders (dry nanoplates and graphene nanoflakes)

We produce graphene dry powders in three categories (see table 1). Drying of graphene powders from aqua or other solutions is carried out by vacuum drying methods with special control of heating and cooling.

Table 1

ParametersGraphene powder №1
Graphene powder №2
Graphene powder №3
Graphene purity> 99%> 96%> 93%Batch control
Defects densityVery lowLowLowPrimary control
Number of layers3 – 74 – 74 – 9Batch control
Content of Sp2> 91%> 90%> 90%Batch control
Thickness of graphene flakes (plates)1,5-3 nm2-4 nm3-5 nm
Lateral sizeto 50 μmto 30 μmto 20 μm
Electrical conductivity5·105 Ohm/m(7-9)·104 Ohm/m(2-3)·104 Ohm/m
Thermal conductivity2200-3400 W/m·К1700-2400 W/m·К1300-2100 W/m·К
Optical transparency, %918681
True density1,9–2,2 g/cm31,9–2,2 g/cm31,9–2,2 g/cm3Bulk density
Content of hybridized carbon> 91%> 91%> 91%Primary control
ColorPractically blackPractically blackPractically black