You are here:  Home > Products > Technical Papers

  Technical Papers

Effects of Hydrogen Gas at 1450°C on Select Fibrous Alumina Insulation Products, Philip Hamling, President, ZIRCAR Ceramics, Inc., Florida, NY, 2002

Multiple types of fibrous alumina insulation materials were tested to determine their stability in hydrogen gas.  Silica bonded types have been known to give superior performance in oxidizing and neutral environments. Alumina bonded types have classically been used as thermal insulation, fixtures and setters in applications where reduction by aggressive furnace atmospheres is encountered. One such aggressive reducing atmosphere is hydrogen, a common cover gas in furnaces for sintering powder metal parts. In hydrogen gas atmospheres, silica - a common binder which imparts high temperature stability and increased mechanical strength - is attacked, dissociates and volatilizes resulting in premature failure of the refractory.

1700°C Rapid Cycle Furnace Design, Philip Hamling, Vice President Sales/Marketing, ZIRCAR Products, Inc., Florida, NY, 1986

Ceramic fiber insulation is made in a variety of shapes, sizes, densities, and compositions. These materials possess a range of characteristics, properties, and utility. Successful applications of fibrous ceramic thermal insulation in rapid cycle furnace chambers operating at 1700°C (3092°F) is critically dependent on its proper use. Consideration must be given to the unique physical, thermal, and chemical properties of these materials and their fabricability.

Design of Low Mass Furnaces for High Temperatures, Philip D. Hamling, ZIRCAR Products, Inc., Florida, NY, 1988

Efforts are being made to increase the operating temperature of low-mass furnaces beyond the current 1700°C limit. Factors which limit the maximum operating temperature of these units, include high-temperature stability of thermal insulation and power density of heating elements. New insulation materials, installation techniques, and heating-element configurations have been successfully incorporated in the construction and testing of a 1750°C continuously rated furnace. This design can be extended for moderate-size furnaces operating at 1800°C. In addition, the size of 1700° C furnaces has been increased for production applications.

Furnace Module User's Guide, Philip D. Hamling, ZIRCAR Ceramics, Inc., Florida, NY,

Technical information about the set up, use and maintenance of Furnace Insulation Modules, Type FIM.

How to select a low mass thermal insulation David Hamling, Vice President, ZIRCAR Ceramics, Inc., Florida, NY, 2001

Sintering Wear Parts with Microwave Heating Morgana Fall, Alfred University, Dr Holly Shulman, Ceralink Inc., Dr. William Walker, CACT Alfred Universtity and Dr. Larry Wolfe, EPL Ceramic Materials, A presentation in which Alumina Insulation Type ECO-25B (subsequently replaced by AL-25/1700) is discussed that was presented at the 104th Annual meeting of the American Ceramic Society in St. Louis MO.

Copyright © 2001  ZIRCAR Ceramics, Inc