The key role of electrical insulation performance of silicone coatings in electronic appliances
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The electrical insulation performance of silicone coatings plays an irreplaceable role in the field of electronic appliances, and its core value is mainly reflected in the following aspects:
1. Basic insulation characteristics and stability
High dielectric strength and pressure resistance
The dielectric strength of silicone coatings is greater than 20 kV/mm, which can effectively isolate current, prevent short circuits and electric shock accidents under high-voltage environments, and ensure the safe operation of electronic components.
Wide temperature range stability
In the extreme temperature range of -60℃ to 200℃, its electrical insulation performance is almost unchanged, and it is suitable for high-cold, high-temperature or hot and cold alternating environments (such as automobile engine compartments, aerospace equipment).
Moisture-proof and chemically inert
The molecular structure is highly hydrophobic, which can block moisture penetration and maintain high surface resistance in an environment with 90% humidity; at the same time, it is resistant to salt spray, acid and alkali corrosion, and is suitable for offshore equipment or chemical environments.
2. Key application scenarios
(1) Chip and semiconductor protection
Chip passivation layer: covers the surface of transistors and integrated circuits, isolates environmental pollutants (such as metal ion content 1ppm), and avoids circuit leakage or signal interference].
Semiconductor contact coating: protects chip contacts from dust and moisture erosion, and improves the long-term stability of components.
(2) Printed circuit board (PCB) protection
Triple anti-coating (moisture-proof, dust-proof, and anti-corrosion): silicone modified coating forms an elastic protective film through spraying or dipping, which is shock-resistant and scratch-resistant, and extends the life of PCB under harsh working conditions.
High purity requirement scenario: used for solar panels and medical electronic equipment to avoid performance degradation caused by impurity ion migration.
(3) Motor and transformer insulation
Motor impregnation paint: replaces traditional epoxy resin, works stably for a long time at ℃ (H-level insulation), and solves the problem of insulation failure caused by coil overheating.
High-frequency equipment application: low dielectric loss and little frequency influence, suitable for G base station transformers and new energy vehicle motor windings.
3. Deep mechanism of performance advantage
Characteristics Mechanism of action Application value
Silicon-oxygen skeleton structure No double bond structure, anti-ultraviolet/ozone decomposition The life of outdoor electronic equipment is extended to decades
Molecular chain flexibility After curing, it forms an elastic colloid, absorbs mechanical vibration, and enhances the shock resistance of vehicle-mounted electronics
Low surface energy Mold is not easy to adhere, and the paint film has high self-cleaning properties. It is mildew-resistant in tropical humid environments