We produce graphene dispersions of nanoplates and nanoflakes in three categories in different base fluids (mainly in distilled and deionized water) (see table 2). The concentration of graphene nanoflakes in water solution can vary from 0.2% to 5%. Higher concentrations of graphene or graphene oxide in the dispersion are produced from graphene pastes (see below).
Table 2
| Parameters | Graphene flakes №1 IG-GNF-1 | Graphene flakes №2 IG-GNF-2 | Graphene flakes №3 IG-GNF-3 | Comments |
| Graphene purity | > 99,4% | > 98% | > 97% | Batch control |
| Defects density | Very low | Very low | Very low | Primary control |
| Number of layers | 3 – 7 | 3 – 9 | 4 – 9 | Batch control |
| Content of Sp2 | > 91% | > 90% | > 90% | Batch control |
| Thickness of graphene flakes (plates) | 1,5-3 nm | 2-3 nm | 3-4 nm | |
| Lateral size | to 100 μm | tto 50 μm | to 30 μm | |
| Electrical conductivity | (6-8)·105 Ohm/m | (2-5)·105 Ohm/m | (8-9)·104 Ohm/m | |
| Thermal conductivity | 2500-3400 W/m·К | 1800-2900 W/m·К | 1400-2600 W/m·К | |
| Optical transparency, % | 95 | 94 | 93 | |
| True density | 1,9–2,2 g/cm3 | 1,9–2,2 g/cm3 | 1,9–2,2 g/cm3 | Bulk density |
| Content of hybridized carbon | > 95% | > 94% | > 93% | Primary control |
| Colour | Practically black | Practically black | Practically black |