Wanted kiln capable of fusing 3ft x 6ft glass art. Kiln has top and bottom elements with a suspended hearth of silicon carbide tiles and fiber insulation. Quartz windows. Computer controlled heating programs and venting.
Ceramic Fiber Insulation Modules
1" thick ceramic fibers oriented perpendicular wall plane. Compressed onto a stainless steel mandrel and banded at 300 PSI. Tightly installed, the bands can be cut while still keeping the insulation under compression. Installation is "finished" off by hammering their kiln-side surfaces with a 2x4 and then spraying them with silica rigidizer to prevent dust. Temperature rated to 2300F.
Mullite Tubing - 1" x 40"
These support the Kanthal heating elements. They are almost as strong and heat resistant as alumina, at a fraction of the cost.
This was used as a support for the lower element tubes below the hearth. It is not suitable as wall insulation.
Silicon Carbide Hearth Tiles
18" x 18" Recrystallized silicon carbide forms the hearth tiles in 2 rows of 4. It is strong, flat, dora not warp and transmits hear relatively well for a refractory. It is also less susceptable to thermal breakage.
Silicon Carbide Beams
The hearth tiles sit on a series of 2"x2"x2' silicon carbide beams which run the width of the kiln.