Antimony-Impregnated Carbon Graphite

Carbon/Graphite and Graphite Materials 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.

Metal Surface Tension1
Antimony (Sb) 367
Copper (Cu) 1290
Silver (Ag) 951
Tin (Sn) 570

1 at impregnation Temperature

Antimony melts at 1,167 °F (630.63 °C) which does constrain its application temperature limits.

Custom Components & Parts

Custom Carbon Graphite Parts Manufacturing We develop parts that are customized to each of our customer’s specific application requirements. Our unique technical knowledge and manufacturing expertise allows us to customize parts within our existing product line or as part of our new product development. Our products are developed and manufactured in-house, so we can customize […]

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Mechanical Seals

CARBON GRAPHITE SEALS & RINGS MANUFACTURING St. Marys Carbon custom manufactures a variety of seals grades to suit any application. We offer blank stock, various impregnations and have the capability to machine intricate seals with polished faces. All of our seals, from the blending of raw materials to the finished product, are made in-house by […]

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Bearings / Bushings

CARBON GRAPHITE BEARINGS & BUSHINGS MANUFACTURING St. Marys Carbon custom manufactures many sizes, shapes and quantities of carbon graphite bearings, including Radial, Thrust and Sleeve. All of our bearings, from the blending of the raw materials to the finished product, are made in-house by our specialized craftsmen. We can custom-manufacture our bearings and bushings to […]

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