Lucifer Furnaces shipped two dual-chamber atmosphere muffle ovens to a customer for the purpose of heat treating superconducting wire used in medical, pharmaceutical and industrial applications. The superconducting wire will be processed inside the muffle under a positive flow of protective nitrogen atmosphere. Each furnace has two 12-inch x 12-inch x 18-inch chambers capable of temperatures to 1400°F (760°C) with a uniformity of +/- 5°C. Unique door-mounted fans circulate the heated atmosphere inside the work chamber, providing uniform temperature throughout.

A Honeywell cascade programmer coupled with an SCR power supply provides precise temperature control inside the muffle around the workload. The furnace is designed with lightweight insulating firebrick, a silicon-carbide hearth plate and heavy-gauge coil-wound heating elements located on both sides as well as under the muffle.