| GE Advanced Ceramics has developed a family of thermal materials based upon its high conductivity thermal pyrolytic graphite (TPG) material. TPG is a unique form of pyrolytic graphite manufactured by the decomposition of a hydrocarbon gas in a high vacuum furnace. Referred to as TC1050, these macrocomposite materials offer both high conductivity, low density, and low thermal expansion properties. TC1050 consists of a TPG core encapsulated within a structural shell. The TPG provides a highly conductive path while the encapsulation material provides the structure (strength, stiffness, and coefficient of thermal expansion). Chemical isolation and electrical insulation of the aluminum from the graphite resistive element for PBN/G evaporators permit electrical resistance stability and consistency throughout their long life. This guarantees absolute flash-to-flash temperature repeatability, total aluminum evaporation and thickness (Q-value) consistency of the deposited layer. Encapsulant materials include 6061 aluminum, OFHC copper, and graphite/polymer composites.Information provided by Momentive Performance Materials, formerly GE Advanced Ceramics. |
