SiC Resistive Heating Element
SiC Resistive Heating Element
High Temperature Electric Furnace SiC Resistive Heating Element
SiC Heating Elements Introduction
H-shaped silicon heating element is manufactured by taking two carefully-matched SiC rods and welding a thickened silicon carbide bridge. This element provides for wiring both tail ends from one side of the furnace. The tail ends of the cold ends are metallized with aluminum, which can provide a low-resistance contact surface to the aluminum connection straps and clamps.
Since H-shaped silicon heating element is composed of two ED silicon heating elements sharing a cold end, it can be connected by the power cord at one end of the furnace. The surface temperature of heating part is 1500. It is mainly used in kilns with high furnace temperature and high temperature uniformity. Its characteristics are electricity saving and long service life.
In addition, a furnace with an energy saving structure can be built because the number of heating element holes on the furnace can be reduced compared with the H types. These elements are widely used as high-temperature heat sources for electric furnaces and for the firing of ceramic capacitors, ferrites and other electronic components.
Physical property of SIC heating element
| specific gravity | 2.6~2.8g/cm³ | bend strength | >300kg |
| hardness | >9MOH’S | tensile strength | >150kg/cm³ |
| porosity rate | <30% | radiance | 0.85 |
Recommended surface load and Influences to Surfaces of the Elements in Different Operating Temperature
| atmosphere | Furnace Temperature(°C) | Surface Load(W/cm2) | The influence on the Rod |
| Ammonia | 1290 | 3.8 | The action on SiC produces methane and destroys the protection film of SiO2 |
| Carbon dioxide | 1450 | 3.1 | Corrode SiC |
| Carbon monoxide | 1370 | 3.8 | Absorb carbon powder and influence the protection film of SiO2 |
| Halogen | 704 | 3.8 | Corrode SiC and destroy the protection film of SiO2 |
| Hydrogen | 1290 | 3.1 | The action on SiC produces methane and destroys the protection film of SiO2 |
| Nitrogen | 1370 | 3.1 | The action on SiC produces insulating layer of silicon nitride |
| Sodium | 1310 | 3.8 | Corrode SiC |
| silicon dioxide | 1310 | 3.8 | Corrode SiC |
| Oxygen | 1310 | 3.8 | SiC oxidized |
| Water-vapor | 1090-1370 | 3.1-3.6 | The action on SiC produces hydrate of silicon |
| Hydrocarbon | 1370 | 3.1 | Absorb carbon powder resulted in Hot pollution |
SiC Heating Elements Drawing
Following are to be provided when making an inquiry or placing an order for H Shape SiC Heating Elements:
- Type: H
- Outer Diameter (OD): in or mm,
- Hot Zone length (HZ) (the heating section): in or mm,
- Cold Zone length (CZ): in or mm,
- Shank spacing (A): in or mm
- Overall Resistance: Ω
As an example:
H Type, OD=20mm, HZ=300mm, CZ=200mm, A=60mm, Resistance=1.84Ω
Specify as: SiC H 20/300/200/60/1.84Ω
SiC Heating Elements Pictures
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