It can be seen that the BET surface area of vermiculite is dramatically boosted with increase of the calcination
temperature, as expected.
In comparison with VM-Raw, the BET surface area enhancements are 53%, 254% and 304%, respectively, for EVM-600, EVM-800 and EVM-1000.
It shows that the vermiculite volume can be significantly expanded as the calcination temperature is increased from 600 C to 800 C.