bluemonster
Jun14-08, 03:28 PM
Dear all.
I am studying the graphene as reinforcement phase of electrical conductive polymer composite. But I have some problems about measuring electrical conductivity of graphite powders.
I have read some articles which related to electrical conductivity of graphite and reduced graphite oxide. In these, they use GEM equation (more exactly is derivative GEM equation), as following:
http://img139.imageshack.us/img139/3844/52679070jt5.jpg
In this formula, two parameters \Phi and \Phic relate to the apparent powder density before compression. I don't know how to measure the apparent powder density ??? Can you help me to resolve it ?
In summary, I want to measure electrical conductivity of powders, and I just know one method above. If anyone has studied it, please support me some other methods.
Thanks in advance.
I am studying the graphene as reinforcement phase of electrical conductive polymer composite. But I have some problems about measuring electrical conductivity of graphite powders.
I have read some articles which related to electrical conductivity of graphite and reduced graphite oxide. In these, they use GEM equation (more exactly is derivative GEM equation), as following:
http://img139.imageshack.us/img139/3844/52679070jt5.jpg
In this formula, two parameters \Phi and \Phic relate to the apparent powder density before compression. I don't know how to measure the apparent powder density ??? Can you help me to resolve it ?
In summary, I want to measure electrical conductivity of powders, and I just know one method above. If anyone has studied it, please support me some other methods.
Thanks in advance.