Effect of carbonization temperature on the electrical conductivity of wood charcoal

The wood powder of masson pine was carbonized at various temperatures in a nitrogen gas atmosphere.The effect of carbonization temperature on the microcrystalline structure and electrical resisitivity was studied.During the charring process,weight loss of wood powder increased with increasing carbonization temperature.X-ray diffraction analysis indicated that the microcrystalline structure of wood charcoal was amorphous carbon structure based on graphite.The electrical conductivity of wood charcoal was directly related to the carbonization temperature because increasing carbonization temperature increased the number of electric ions and crystallite size,both of them were favorable for decreasing the electrical resistivity.