The electrical properties of silicone resin are one of its important properties, mainly due to its unique molecular structure and chemical composition, the specific manifestations are as follows：
1. Excellent electrical insulation properties
High electric breakdown strength: The electric breakdown strength of silicone resins is usually around 50 kV/mm, indicating that they can still maintain insulation properties at high voltages.
High volumetric resistivity: The volumetric resistivity is usually in the range of 1013~1014 Ω·cm, which means that its internal resistance is extremely high and current is difficult to pass through.
Low dielectric constant: The dielectric constant is about 3, which varies little over a wide temperature and frequency range, and is suitable for high-frequency electronic equipment.
Low dielectric loss: The tangent value of the dielectric loss angle (tanδ) is about 10-3, indicating that its energy loss in the electric field is extremely low.
2. Stability over a wide temperature and frequency range
High temperature stability: In a high temperature environment (such as above 200℃), the electrical properties of silicone resins vary slightly, which is suitable for high-temperature electronic equipment.
Frequency stability: In a wide frequency range (such as from low frequency to high frequency), its dielectric constant and dielectric loss do not change much, and it is suitable for high-frequency circuits and microwave devices.
3. Moisture resistance
Moisture resistance: The hydrophobicity of the silicone resin allows it to maintain excellent electrical insulation properties in a humid environment, preventing the deterioration of insulation properties caused by moisture penetration.
Moisture and heat resistance: In high temperature and humidity environments, its electrical properties change little, and it is suitable for use in electronic equipment in outdoor and humid environments.
4. Arc and corona resistance
Arc resistance: Silicone resin has excellent arc resistance, can withstand arc discharge without being easily penetrated, and is suitable for high-voltage electrical equipment.
Corona resistance: In the corona discharge environment, its insulation properties are not easy to degrade, and it is suitable for equipment such as high-voltage cables and transformers.
5. The relationship between thermal stability and electrical properties
Electrical properties at high temperatures: Due to the high bond energy of the silicon-oxygen bond (Si-O), the silicone resin can still maintain stable electrical properties at high temperatures and is not prone to thermal aging.
High-frequency characteristics: In a high-frequency environment, its dielectric constant and dielectric loss vary less, which is suitable for high-frequency circuits and microwave devices.
6. Regulation of electrical properties
Molecular design: By adjusting the molecular structure of the silicone resin (such as the introduction of different organic groups), its electrical properties can be regulated to meet different application needs.
Filler modification: Adding conductive or insulating fillers (such as silver powder, silica, etc.) can further optimize its electrical properties.
7. Application area
Electronic packaging: used for integrated circuit (IC) packaging, LED packaging, etc., to provide excellent insulation protection.
Cable insulation: It is used as an insulating layer for high-voltage cables to ensure the safe operation of cables in high-temperature and high-voltage environments.
Electronic components: Used for insulating coatings of electronic components such as capacitors and resistors to improve their reliability and stability.
Aerospace: An ablation-resistant insulation material used in spacecraft to withstand the effects of high temperature and high-speed airflow.
8. Comparison with other materials
Better than traditional organic resins: In high temperature and humid environments, the electrical properties of silicone resins are far superior to traditional organic resins (such as epoxy resins, polyester resins, etc.).
Compared with inorganic materials: although inorganic materials (such as ceramics) have excellent electrical properties, organic silicone resins have better flexibility and processability.
7. Typical application case
Chip packaging: Silicone resin is used as a potting material to protect the chip from moisture, dust and chemicals, and at the same time has good heat conduction properties.
High-voltage electrical appliances: It is used as an insulating material for high-voltage electrical equipment to improve the high-voltage resistance and safety of the equipment.
Medical equipment: used to manufacture insulating parts and coating materials to ensure the safety and reliability of medical equipment.
8. Future development trends
With the development of electronic technology, higher requirements have been put forward for the electrical properties of silicone resins, such as：
High frequency and high speed: the dielectric constant and dielectric loss need to be further reduced to meet the needs of high-frequency electronic equipment.
Multifunctional: Through modification, the silicone resin is given other functions (such as thermal conductivity, flame retardant, etc.) to expand its application field.
The excellent electrical properties of silicone resins are mainly reflected in the aspects of high electrical breakdown strength, high volume resistivity, low dielectric constant and low dielectric loss.Its excellent electrical insulation properties and temperature resistance make it widely used in electronics, electrical, aerospace and other fields.With the advancement of technology, the electrical properties of silicone resins will be further improved to meet the needs of more high-end applications.
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IOTA 6608/6609 Pure Organic Silicone Resin Emulsion - IOTA CORPORATION LTD. 
