Dense crystalline graphite is also called massive graphite. This type of graphite crystal is clearly visible to the naked eye. The particle diameter is greater than 0.1 mm, and the specific surface area ranges from 0.1-1m2 / g (automatic 3H-2000BET-A automatic nitrogen adsorption specific surface area instrument BET method test), the crystal arrangement is disordered, showing a dense block structure. This type: graphite is characterized by a high grade, with a general carbon content of 60 to 65%, and sometimes 80 to 98%, but its plasticity and greasiness are not as good as flake graphite.
It is very important to study the specific surface area of ​​graphite. The detection data of specific surface area of ​​graphite is only reliable when the results are detected by BET method. At present, the multi-point BET method is adopted uniformly for the measurement of specific surface area at home and abroad. The specific surface area measurement standards developed at home and abroad are based on the BET test method. Please refer to China's national standard (GB / T 19587-2004)-Gas adsorption BET principle Method for determining the specific surface area of ​​solid materials.
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