CM Furnace – 300 Series

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The CM 300 Series furnaces are available in a variety of configurations from manually loaded lab-scale units to fully automated production systems. These furnaces employ a molybdenum wound aluminum oxide muffle, typically D-shaped, designed to operate from 800°C (1472°F) to 1700°C (3100°F) on the standard models and as high as 1800°C (3272°F) for special applications.

The base model includes inclined doors with protective atmosphere flushes, high heat section, and a cooling section. Depending on application requirements other features are added such as preheat sections, binder removal sections, multiple zone controls, low or high dewpoint features, and turn-key automated pusher systems.

The furnaces are constructed of heavy gauge steel that is welded and reinforced. All power components and controls are located on the main frame assembly. A very efficient block graded brick insulation package is utilized with high purity alumina brick on the hot face. Tunnel cross-sections up to 8” wide by 6” high are offered with the 300 Series muffle design furnaces. When automated the pusher plates (carrier trays) form a train and are pushed through the furnace by an external stoker device. All automation is located outside the heat envelope for ease of maintenance and long life.

Hydrogen, dissociated ammonia, forming gas or any other reducing atmosphere compatible the refractory metal heating elements can be employed. The standard gas panel includes all necessary pressure regulators, flow meters, solenoids and pressure switches for both primary processing atmosphere and standby safety nitrogen. All furnaces come complete with the CM combustion atmosphere safety system. Full details are available on request.

Temperature control is by microprocessor based setpoint controllers operating in conjunction with phase angle-fire SCR power controllers and type “C” thermocouples. Independent overtemperature instrumentation is standard.


  • Total system packaged in common frame including power and control components
  • Heavy Gauge Welded and Reinforced Steel Frame
  • Atmosphere Containment Doors with Protective Atmosphere Flushes
  • Molybdenum Wound Aluminum Oxide Muffle Element
  • Block Graded Alumina Brick Insulation Package
  • Water-Jacketed Cooling Section
  • Microprocessor Based Set Point Temperature Controller
  • Phase Angle-Fire SCR Power Controller
  • Independent Overtemperature Instrumentation
  • Type “C” Thermocouples
  • Manual Operation


  • Refractory Metals
  • Powder Metals
  • Ceramics
  • Nuclear Fuel
  • Phosphor
  • Sintering
  • Metallizing
  • Firing
  • Co-Firing
  • Annealing
  • Brazing
  • Reducing


  • Preheat Sections
  • Binder Removal Sections
  • Multiple Zone Control
  • Low or High Dewpoint Features
  • Dewpoint and Oxygen Monitors
  • Turn-Key Automation with External Stoker
  • Data Recording Equipment