HED International Offers Advanced Specialty Kilns

Electric Top Hat Kiln

Firing and sintering specialized advanced ceramics demands a special kiln. HED International’s Unique/Pereny kilns are capable of precise atmosphere and temperature control. This especially applies for the temperature range of 60°C to 1800°C, in either electric or gas fired kilns. The primary process requirements are:
1) Residual carbon removal, i.e. binder burnout, requiring precise atmosphere and low temperature conditions,
2) Sintering or co-firing demanding uniform controlled atmosphere and temperature processing.

Gas fired kilns, equipped with high velocity recirculating burners utilize excess air at low temperatures and on-ratio operation at high temperatures to affect atmosphere and temperature uniformity within ± 2°C up to 1800°C.

Fuel Fired Bell Kiln

Electric fired kilns, such as the top hat unit shown, are equipped with zone controlled heating elements and atmosphere recirculating inspiration jets (up to 1,000 fps), to achieve temperature uniformity of ± 2°C up to 1800°C. These jets add high velocity convection heat transfer to the electric infrared heating in the kiln. For example, the actual measured temperature uniformity values of a kiln firing to a setpoint of 1260°C are shown in the table below.

HED International, Inc. is a leader in the design and manufacture of processing systems for technical ceramic and non-ceramic materials. For more information on our PRO-CAST® Series of Tape Casting/Coating Machines or our UNIQUE/PERENY® Series of energy efficient kilns, please contact

HED International, Inc.
P.O. Box 246, 449 Highway 31
Ringoes, NJ 08551
Fax: 609 466-3608
Phone: 609 466-1900
Web-site: www.hed.com
Email: info@hed.com