Thermal Spray in Electrical and Electronic Industries
- Thermal Spray Coatings are very useful in applications such as capacitors, insulators, resistors, and inductors.
- Coatings of oxide ceramics (alumina, titanate, beryllia) are used as dielectrics, while metals, and alloys are used for current carrying and bonding to ceramic substrates, metals for electromagnetic shielding.
- Alumina plasma-sprayed coatings are currently used in ozonizers. Alumina coatings with a thickness up to 1,000 μm and serving as dielectric is deposited together with the metal electrode on top of the glass tube in ozonizers.
- Alumina is also used for high-temperature strain gages and insulation of induction heating coils.
- For electrical heaters, arc-sprayed coatings are used, masking permitting to define the geometry.
- Wire arc-sprayed coatings are used as shielding material to eliminate electromagnetic and radio frequency interference and dissipate static discharge sparks.
- Thermal sprayed coatings are also used to produce thick films electrical circuits that can carry higher current than printed ones.