The performance of ordinary dimethyl silicone oil has an upper limit. The modified silicone oils with methyl phenyl and hydrogen-terminated phenyl groups (such as IOTA-250-30, IOTA-233, IOTA-R32, etc.) leverage their unique advantages in high-temperature resistance, high insulation, high refractive index, and radiation resistance to enter the high-end manufacturing sectors of semiconductors, LEDs, photovoltaics, and new energy vehicles. The domestic production process of high-end specialty silicone oils has been comprehensively accelerated.

In the field of electronic semiconductors, phenyl silicone oil can maintain a long-term operating temperature above 250°C, far exceeding the upper limit of 180°C for ordinary silicone oil. It is used for filling in IGBT power devices and LED COB lamp beads, providing both insulation and heat conduction with high light transmittance, thereby enhancing the light efficiency of lamps and reducing the high-temperature loss of chips. For circuit boards and precision sensors, phenyl silicone oil is used for moisture-proof encapsulation, isolating water vapor and dust, and is suitable for outdoor and vehicle environments with complex high-temperature conditions. For AI computing servers, modified phenyl silicone oil is selected as the immersion cooling medium, providing stable heat dissipation and safe insulation, supporting the operation of high-power computing clusters.

In the photovoltaic and power industry, high-temperature insulating phenyl silicone oil is used as the impregnating oil for transformers and capacitors, withstanding electrical arc breakdown, reducing equipment size, and enhancing the safety and service life of power equipment. The internal wiring box of photovoltaic components is filled with silicone oil to resist temperature differences between day and night and rain erosion, reducing the failure rate of components.

The demand in the new energy vehicle sector is growing rapidly. Phenyl silicone oil is used for heat conduction and sealing in battery module and on-board chargers to suppress the risk of battery thermal runaway. High-refractive-index phenyl silicone oil is used for encapsulation of automotive optical lenses and displays, with excellent light transmittance, no fogging, and no migration of small molecules, ensuring the long-term stable operation of automotive imaging equipment.

Previously, high-end phenyl silicone oil was monopolized by overseas enterprises. In recent years, domestic silicon material enterprises have achieved technological breakthroughs in production technology, and the various indicators of domestic IOTA series phenyl silicone oil have been benchmarked against imported products, with significant price advantages. Industry institutions predict that the market size of high-end specialty phenyl silicone oil will increase by 28% year-on-year in 2026. Electronics and new energy will continue to drive the increase in the demand for high-end silicone oil, making it a core growth curve in the silicone industry.