A uniquely engineered, high-temperature refractory metal hot zone has been delivered by the furnace division of an international supplier of refractory technology metals and technical ceramics to one of its furnace customers. The engineering team of the German manufacturing firm H.C. Starck fabricated a 1600°C hot zone designed to operate in a vacuum, with certain inert gases or in a reducing atmosphere. By simulating the temperature of each layer, it was ensured that the proper materials were applied throughout the hot zone.