Impregnated Graphite / Antimony Graphite
Impregnated Graphite / Antimony Graphite are inherently porous after the material processing. It is common to impregnate these materials with a Resin or Metal to:
- Increase the Strength,
- Increase the Thermal Conductivity,
- Reduce the Resistivity,
- Reduce the Porosity, and/or
- Impart Impermeability.
These benefits can lead to secondary benefits such as the impregnation with Antimony reducing the Porosity leading to a reduction in Blister formation particularly in light Hydrocarbon and hot Oil applications.
Some end-users experience that certain impregnants such as Babbitt (particularly Leaded Babbitt), Silver, and Antimony improve the friction and wear characteristics of the Carbon/Graphite or Graphite Component. While this beneficiation may be actual, we have not seen this effect in laboratory testing.
Antimony is uniquely efficient at reducing porosity in Carbon / Graphite and Graphite materials. This is due in part to the low Surface Temperature of the molten metal.