(July 30, 2026)The AI computing power industry maintains rapid expansion, bringing new growth opportunities for modified fumed silica dedicated to thermal interface materials for electronic heat dissipation. With the large-scale construction of supercomputing centers, AI servers and high-performance computing chips, the power density of electronic devices keeps rising. The market continuously raises requirements on mechanical strength, long-term thermal stability and anti-settling thixotropy of thermal conductive gels, thermal pads and thermal conductive greases. As a key functional additive in thermal conductive composite materials, hydrophobic modified fumed silica serves to reinforce materials, prevent sagging and restrain filler sedimentation. The computing-power electronics heat dissipation sector has gradually become a brand-new growth pole for high-end silica.
For a long time, conventional hydrophilic fumed silica is poorly compatible with thermal conductive silicone systems. Abundant hydroxyl groups on the powder surface easily trigger continuous viscosity increase of the system. Thermal conductive gels will harden and lose fluidity during long-term storage, failing to meet the long-service requirements of server heat dissipation materials. Heat-dissipation-specific silica with precise surface hydrophobic modification can disperse evenly in silicone substrates and effectively improve the dispersion of high-thermal-conductivity powder such as alumina and boron nitride to avoid filler sedimentation and delamination. Meanwhile, it endows thermal conductive materials with excellent thixotropy to prevent leakage and flowing under high-temperature working conditions, balancing soft resilience and long-term stability. It is widely applied in thermal pads for AI servers, thermal conductive gels for consumer electronics and thermal greases for chip packaging.
In the second half of 2026, intelligent computing center projects across China speed up construction, and computing hardware manufacturers continuously promote the localized substitution of heat dissipation materials. Downstream end-users keep lifting purity standards for electronic materials and impose strict control over trace metallic impurities and volatile small-molecule substances. Leading domestic silica enterprises target the layout of electronic-grade dust-free production lines, continuously optimize combustion synthesis and surface modification processes, and develop a series of electronic-grade hydrophobic silica with graded specific surface areas. Many powder enterprises conduct joint formula testing with thermal material research institutes, and develop customized filler solutions for high-hardness thermal pads, self-leveling thermal conductive gels and ultra-thin heat dissipation materials for chips.
Different heat dissipation products have differentiated indicator requirements for silica. Self-leveling thermal conductive gels prioritize powder thixotropy regulation, balancing construction fluidity and high-temperature anti-flow performance; rigid thermal pads require remarkable reinforcing effects to improve tear resistance and compression resistance; ultra-thin thermal materials for consumer electronics enforce strict impurity control, pursuing low haze and highly stable batch performance; thermal products for vehicle-mounted computing modules need to pass long-term high-low temperature cycling aging verification. A single universal grade cannot satisfy diverse working conditions, pushing powder manufacturers to build segmented product portfolios. Leading electronic material companies adopt lengthy certification procedures for new raw materials, continuously raising market entry barriers.
The track boasts tremendous long-term development potential, yet objective industrial challenges remain. Fumed silica for electronic heat dissipation requires strict standards for production cleanliness and impurity control, demanding high investment in production lines. Overseas high-end electronic-grade powder has long occupied the supply chains of top clients. Numerous small and medium-sized powder manufacturers adopt primitive modification technologies with unstable batch performance, making it difficult to enter the computing-power electronics industrial chain. A small amount of low-cost substandard powder circulating in the market may cause premature failure of terminal heat dissipation materials and bring hidden dangers to equipment operation.
Differentiation between supply and demand in the industry keeps intensifying. Leading enterprises equipped with stable refined modification processes, comprehensive electronic material testing capacity and formula technical support achieve steady growth in orders. Manufacturers lacking high-purity production technologies that only produce general powder are confined to the low-end civil heat dissipation market. The localization of the computing-power electronics industrial chain accelerates, and procurement orders keep converging to upstream raw material suppliers with stable quality control and complete certifications.
Industrial research institutes predict that investment in computing infrastructure will keep increasing in China over the next three years, demand for high-performance thermal interface materials will rise steadily, and the market scale of high-end fumed silica for electronic heat dissipation will continue to expand. This track features high added value and strong growth momentum. It acts as a vital direction for fumed silica enterprises to escape fierce competition in traditional sectors and access the high-end electronic new material market.
In the long run, developing fumed silica for thermal interface materials helps domestic silicon-based powder enterprises accelerate import substitution of high-end electronic powder. Domestic silica manufacturers shall continuously optimize the integrated process of high-temperature synthesis, deep purification and hydrophobic modification, and complete compliance certifications related to electronic raw materials. Strengthen upstream and downstream collaborative R&D with thermal material and electronic packaging enterprises, iterate filler products matching heat dissipation solutions for new-generation computing hardware, and enhance the competitiveness of domestic fumed silica within the global electronic new material industrial chain.