Almatis Logo

产品& 应用 / Ceramics /  

Spark Plugs

Spark Plugs

Spark plugs are a critical part of ignition systems in internal combustion engines and industrial applications. As the voltage differential between the electrodes exceeds the dielectric breakdown voltage of the gases in the chamber, the gases ionize and a spark is generated.  The spark ignites the fuel/air mixture and typically facilitates a thermo-mechanical energy conversion.

Alumina is used in the insulator, which insulates the central electrode and must have a high dielectric strength.  As ignition technology evolves with a focus on energy efficiency, the spark plug is being subjected to higher voltages while the geometry is becoming increasingly elongated.  These increased demands require a more robust insulator with thinner walls and higher dielectric strengths.

Almatis calcined aluminas for spark plug applications include coarse, medium and fine crystalline products with intermediate and low Na2 levels.  These products are easily processed in wet or dry grinding systems and provide tight shrinkage characteristics for the insulator body.

From standard bodies to high performance insulators, Almatis aluminas have consistently met the ever-tightening industry requirements of thinner walls and higher dielectric strengths for over 50 years. 

Unground calcined Aluminas

CT 800 LS

Primary Crystal Size = 1.7µm
Specific Surface Area = 0.70 m2/g
Na2O Content = 0.07%

A 10

Primary Crystal Size = 4.8µm
Specific Surface Area = 0.20 m2/g
Na2O Content = 0.08%

CL 5000

Primary Crystal Size = 4.1µm
Specific Surface Area = 0.30 m2/g
Na2O Content = 0.06%

CL 3000

Primary Crystal Size = 1.8µm
Specific Surface Area = 0.70 m2/g
Na2O Content = 0.06%

CL 2500

Primary Crystal Size = 1.7µm
Specific Surface Area = 0.90 m2/g
Na2O Content = 0.06%

CT 1200

Primary Crystal Size = 1.1µm
Specific Surface Area = 1.2 /g
Na2O Content = 0.06%

HVA

Primary Crystal Size = 2.7µm
Specific Surface Area = 0.50 m2/g
Na2O Content = 0.12%

CT 700

Primary Crystal Size = 2.0µm
Specific Surface Area = 0.60 m2/g
Na2O Content = 0.12%

CT 800

Primary Crystal Size = 1.7µm
Specific Surface Area = 0.70 m2/g
Na2O Content = 0.12%

Continuous Ground Calcined Aluminas

CL 2500 SG

Ground Median Size = 3.1µm
Ground Surface Area = 1.1 m²/g
Na2O Content = 0.06%

A 10-325

Ground Median Size = 8.0µm
Ground Surface Area = 0.50 m²/g
Na2O Content = 0.08%

CL 3000 FG

Ground Median Size = 4.2µm
Ground Surface Area = 0.90 m²/g
Na2O Content = 0.06%

CL 3000 SG

Ground Median Size = 3.9µm
Ground Surface Area = 0.90 m²/g
Na2O Content = 0.06%

CT 800 FG

Ground Median Size = 3.5µm
Ground Surface Area = 0.90 m²/g
Na2O Content = 0.12%

CT 800 SG

Ground Median Size = 3.4µm
Ground Surface Area = 1.0 m²/g
Na2O Content = 0.12%

Batch Ground Calcined Aluminas

A 152 SG/NM

Ground Median Size = 1.2µm
Ground Surface Area = 4.5 m²/g
Na2O Content = 0.06%

A 152 GR/NM

Ground Median Size = 1.2µm
Ground Surface Area = 5.4 m²/g
Na2O Content = 0.06%

A 16 SG

Ground Median Size = 0.4µm
Ground Surface Area = 8.8 m²/g
Na2O Content = 0.07%

CT 3000 SG

Ground Median Size = 0.4µm
Ground Surface Area = 7.5 m²/g
Na2O Content = 0.08%

A 152 SG

Ground Median Size = 1.2µm
Ground Surface Area = 4.3 m²/g
Na2O Content = 0.06%

CT 1200 SG

Ground Median Size = 1.4µm
Ground Surface Area = 3.1 m²/g
Na2O Content = 0.06%

News & Events