Thermal Spray Coatings Applications
- Thermal spray coatings play a significant role in electrical and electronic applications such as capacitors, insulators, resistors, and inductors.
- Oxide ceramic coatings—like alumina, titanate, and beryllia—serve as dielectric layers, while metals and alloys are applied for current conduction, bonding to ceramic surfaces, and electromagnetic shielding.
- In ozonizers, plasma-sprayed alumina coatings up to 1,000 μm thick act as dielectrics and are applied alongside metal electrodes on glass tubes.
- Alumina is also utilized in high-temperature strain gauges and for insulating induction heating coils.
- For electric heaters, arc-sprayed coatings—often shaped using masking—define the desired geometry.
- Wire arc spraying is also used for electromagnetic and radio frequency shielding, and for safely dissipating static discharge sparks.
- Additionally, thermal spray technology is used to create thick-film electrical circuits capable of handling higher current loads than conventional printed circuits.
