Silicon Nitride Ceramic Ignitor (Si3N4)

Product ID: 7ab3 
 
 

This product takes tungsten wire as heat source which is buried in silicon nitride (Si3N4) substrate, through hot-pressing forming, sintering, grinding, and welding wire, to obtain ignition component. Due to adopting silicon nitride ceramic (Si3N4) as heating substrate material, this ignition overcomes all the drawbacks that the metal sleeve electric plug possesses: no high temperature tolerance, short life and long warming up time, etc., and can be made into proper shapes to fit application requirements.

Silicon nitride ceramic (Si3N4) ignition features in:
  • 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, surface temperature can be increased to 1100 0C in 15 seconds
  • Acid and alkali corrosion resistance
  • Small size and light weight
  • Long service life up to 5000 h
  • Power on / off circle can reach 10 million times
  • Fast Preheat: when preheat temperature is 850 0C, the preheating time only need 3 to 5 seconds
  • Low-temperature starting performance: -30 0C reliable starting
  • High strength at high temperature, suitable for high-speed diesel engines and various high-temperature ignition 
 
 
 

Properties and Specifications (at Room Temperature)

 
 

No.

Property & Specification

Value

1

Density (g/cm3)

3.2 ‒ 3.4

2

Flexural Strength (MPa)

900

3

Fracture Toughness (MPa∙m1/2)

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)

1014

8

Specific Heat (J/(Kg∙K))

640

9

Dielectric Constant

6 ‒ 7

  
 

Performance Comparison:

Silicon Nitride Ceramic Ignitor and Metal Ignitor

 
 

No.

Product Performance

Si3N4 Ignitor

Metal Ignitor

1

Preheating Temperature (0C)

800 ‒ 900

800 ‒ 900

2

Preheating Time (s)

5 ‒ 6

20 ‒ 40

3

Preheating Power (W)

≤45

100

4

Power On/Off Circle (times)

105

240

5

Low Temperature Starting Performance (0C)

-30

-5

 
 

Silicon nitride (Si3N4) ignitor is widely used in domestic, industrial and commercial applications. Typical applications include:

  • Oil type medium ignition

  • Gas ignition

  • Burner ignition

  • Preheat ignition

  • A variety of high-temperature ignition

 
According to rated power/voltage and heating zone dimension, there are 5 types of Si3N4 ceramic ignitor available. Custom size Si3N4 ceramic ignitors are also provided upon request. Please refer to Available Feedthrough Type for optional feedthrough.
 


 

 

 

       

Rated Voltage: 6-24 V

Rated Power: 30-90 W

Heating Zone

16x3.85

 

Rated Voltage: 6-24 V

Rated Power: 30-90 W

Heating Zone

20x4.5 

 

Rated Voltage: 24 -60 V

Rated Power: 100-250W

Heating Zone

30(35)x10

 

Rated Voltage: 24-130V

Rated Power: 200-350W

Heating Zone

33x14.5

 Rated Voltage: 24 - 150 V

Rated Power: 250 - 400 W

Heating Zone

43x14.5