Phenyl silicone oil accelerates its adoption in the field of insulation and heat dissipation. Analysis of common selection questions

Silicone Diffusion Pump Oil IOTA 704-IOTA
1. Phenyl silicone oil is suitable for special insulation scenarios. The demand for electrical compatibility continues to increase.
In scenarios such as insulation for power devices, high-temperature sensor heat transfer medium, and protection for high-voltage components, phenyl silicone oil is favored by downstream formulation and process personnel due to its excellent electrical insulation properties, arc resistance, and thermal stability. Compared to ordinary silicone oil, the phenyl structure gives the material better resistance to thermal aging, and it is less likely to deteriorate rapidly under alternating temperature conditions, making it suitable for long-term continuous operation electrical compatibility solutions. The number of technical inquiries has steadily increased.


2. Will the insulation performance of phenyl silicone oil significantly decrease as the temperature rises?
Answer: Within the allowable usage temperature range of the material, the attenuation of phenyl silicone oil's insulation performance is much less than that of many hydrocarbon insulation oils. However, when the temperature exceeds its tolerance limit, the material will gradually oxidize and decompose, generating polar impurities, increasing dielectric loss, and reducing insulation performance. During use, it is necessary to strictly control the operating temperature and avoid prolonged operation at high temperatures.


3. Will phenyl silicone oil corrode rubber and plastic seals?
Answer: Conventional phenyl silicone oil has good compatibility with most fluorine rubber and silicone rubber, but some nitrile rubber, ordinary PVC, and polystyrene materials are prone to swelling and cracking. Before the new project is put into production, it is necessary to conduct a compatibility test of the sealing material immersion to confirm that the size and hardness of the sealing piece do not change significantly before it is put into use.


4. Can phenyl silicone oil be emulsified with water to be used as an emulsion?
Answer: It can be emulsified, but the difficulty of emulsification is higher than that of dimethyl silicone oil. The higher the phenyl content, the stronger the polarity of the silicone oil, and the formulation of the emulsification system needs to be adjusted specifically for the types and ratios of emulsifiers; the storage stability of the emulsion after emulsification is weak, prone to stratification, and it is not recommended to be stored for a long time. It is best to prepare and use it immediately.