PBN Coated Heater: A heating element with a graphite substrate coated with pyrolytic boron nitride (PBN). The graphite provides excellent electrical and thermal conductivity for rapid heating, while the PBN coating offers high purity, chemical inertness, high-temperature resistance, and electrical insulation. This protective layer shields the graphite substrate from corrosion and wear, prevents impurity release at elevated temperatures, and ensures stable and reliable heating performance.
