Ceramic Insulation for Box Furnaces
In this blog post, we will explore ceramic insulation for box furnaces in more detail.
Ceramic Insulation: Boards and Blankets
The two standard variations of ceramic insulation for box furnaces are rigid ceramic fiber boards and flexible blankets. These are manufactured using strands of refractory silicate compressed or woven into a lightweight textile, with excellent inherent strength and low thermal conductivity.
To improve the flame impingement properties and provide an element of structural performance, ceramic fiber blankets are often impregnated with a high-performance resin and formed into rigid shapes. These can be easily machined to specification without impacting the thermomechanical qualities that make the ceramic insulation ideal for hot face applications. Multiple ceramic insulation boards can be profiled to fit together into a purpose-built box unit for muffle-type furnaces.
Ceramic fiber board is often used as a secondary form of insulation in box furnaces to support the performance of flat plate heaters.
Ceramic Insulation: Flat-Plate Heaters
A flat plate heater is a composite heating element and insulation product that exploits the low thermal mass of ceramic insulation to optimize the radiation of heat through a processing chamber. This utilizes a cast plate ceramic with grooves designed to house wire heaters, which may be fully embedded or partially exposed. Typical heating elements include helical coils, rod overbend, and ribbon heaters.
As flat plate heaters are constructed using ceramic fiber board, can be arranged in a similar format. Box furnaces can be constructed with
Ceramic Insulation from Thermcraft
Thermcraft specializes in custom furnaces and furnace components for advanced thermal processing applications. We offer an extensive range of ceramic insulation in custom sizes to meet the most demanding specifications. Our box furnaces are available in a range of sizes and temperature capacities, ranging upwards of 1650°C (3000°F). We also offer high-performance refractory ceramic insulation for custom furnace applications.