Silicon Nitride Ceramic Air Heating Element (Si3N4)
Si3N4 Ceramic Air Heating Element uses high-performance silicon
nitride ceramic (Si3N4) as the substrate, has excellent properties
such as: high mechanical strength at high temperatures, high
thermal shock resistance, acid corrosion resistance, high electric
insulation and thermal conductivity. Due to its special formula and
the hot pressing manufacturing technology, this product has the
following
Features in applications:
- High electric insulation strength: No breakdown for 1 minute, at
2500V, 50Hz, and room temperature
- High application temperature: maximum 1200 0C in air
- High power at unit surface, up to 25 W/cm2
- Small thermal inertia and fast heating
- Acid and alkali corrosion resistance
- Small size
- Long life
Typical applications include:
- Die heater
- Packaging machinery heater
- Tobacco equipment heater
- Industrial heating equipment
- Hot and cold drink machine heater
- Burner appliance ignition system
- Welding furnace heating
- Petrochemical industry heater
- High temperature ignition
Caution during application:
- Sudden cold and sudden heat are strictly prohibited in working
environment
- At high temperature, the hot surface of element should avoid from
splashing water or other liquids
Data Sheet & Typical properties of silicon nitride material:
No. | Property & Specification | Value |
1 | Density ( g/cm 3 ) | 3.2 ‒ 3.4 |
2 | Flexural Strength ( MPa ) | 900 |
3 | Fracture Toughness ( MPa∙m 1/2 ) | 6 ‒ 8 |
4 | Hardness ( HRA ) | 92 ‒ 94 |
5 | Thermal Conductivity ( W∙m -1 ∙K -1 ) | 23 ‒ 25 |
6 | Coefficient of Thermal Expansion ( K -1 ) | 3.1 x 10 -6 |
7 | Electric Resistivity ( Ω∙cm ) | 10 14 |
8 | Dielectric Constant | 6 ‒ 7 |
9 | Rated Voltage ( V ) | 50 ‒ 250 |
10 | Power Frequency ( Hz ) | 50 / 60 |
11 | Rated Power ( W ) | 450 ‒ 550 |
According to heating zone dimension, there are 17 types of heating
element available. Custom size heating elements are also provided
upon request.
