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The Exceptional Nature of Graphite
The most significant property of graphite is its dimensional strength and stability at ultra-high temperatures. It resists cracking, warping, shrinking, or distortion even when temperatures exceed 2500° C.
Graphite is resistant to both thermal shock and chemical attack, and can act as either a thermal conductor or insulator, depending on the application. At the same time, it is electrically conductive and naturally lubricating. Essentially inert, graphite is considered to be environmentally safe and non-toxic. While standard synthetic graphite is quite pure, extremely pure grades are available for special applications such as research and elemental analysis.
It can also be processed into a variety of forms from felts and foils to composites and precisely machined components.
Uses of Graphite
Application
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Why Graphite Works
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| Crucibles |
High purity. Excellent resistance to
thermal shock and chemical attack.
Non-wetting by most molten metals. |
| Electrical Heating Elements |
With electrical properties falling between those of metals and ceramics, the electrical resistivity can be varied over a considerable range. |
| Bushings |
Self-lubrication and durability in the
absence of petroleum-based lubricants,
at temperatures to 1,200° F |
| Sintering Trays and Boats |
Thermal stability, low wettability
and low specific heat. |
| EDM Electrodes |
Electrical conductivity, resistance to wear
from electrical arcing and excellent
machinability into complex shapes. |
| Molds |
Dimensional stability,
low wettability and high purity. |
| Seal Faces |
Self-lubrication, dimensional stability
and resistance to chemical attack. |
| Continuous Casting Dies |
Dimensional stability, excellent machinability
high thermal conductivity and self-lubrication. |
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