DB ( Dumbbell ) Type Silicon Carbide Heating Element for Furnaces
SIC Heating Element Description
Silicon carbide heating element is a non-metallic rod or tube
shaped high temperature electric heating element. Ultra-pure green
hexagonal silicon carbide is selected as the main material, and
blank and silicon crystals are made at 2400ºC. In the oxidizing
atmosphere, the service temperature can reach 1450℃, and the
continuous service life can reach 2000 hours. The dumbbell type
element, with an expanded cold end, was one of the earliest designs
of the heating element. In contrast, modern dumbbell components all
employ advanced technology that keeps the end cool due to the
reduced resistivity of the cold end material during the
manufacturing process. As a result, oversized cold endpoints are no
longer needed. Non-dumbbell elements or ED type elements can be
substituted for dumbbell elements.
Physical property of SIC heating element
| specific gravity | 2.6g/cm³~2.8g/cm³ | bend strength | >300kg |
| hardness | >9MOH’S | tensile strength | >150kg/cm³ |
| porosity rate | <30% | radiance | 0.85 |
Following should be provided when inquiring or ordering DB
(Dumbbell) Silicon Carbide Heating Elements:
Type: DB
Outer Diameters: of the Hot Zone (D1) and of the Cold Zone (D2), mm
Length: of the Heating Section or the Hot Zone, HZ, mm
Length: of the Cold Zone, CZ, mm
Overall Length: OL, mm
Example: Type DB, D1/ D2=18/28mm, HZ=300mm, CZ=350mm, OL=1000mm, Resistance 1.70Ω
Specified as:
SPK DB18/28/300/350/1.70Ω
