Thermal Spray in Electrical and Electronic Industries
Thermal Spray Coatings Applications
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 are 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.
