Alumina powder disperser, powder disperser, composite modifier

Release time:

2025-04-28 08:32

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As the world's most widely used halogen-free flame retardant material, ultra-fine alumina (including aluminum hydroxide) is widely used in polymer materials and electronic ceramics due to its low smoke, harmlessness, and cost advantages. However, the high specific surface area of nano-alumina leads to severe agglomeration, which not only reduces dispersibility but also causes problems such as embrittlement of composite materials and decreased processing performance, limiting its application in high-end scenarios. Surface coating modification technology, by constructing functional coatings (such as silane coupling agents and stearic acid) on the surface of alumina particles, can significantly improve its dispersibility, corrosion resistance, and bonding strength with the matrix, making it a core filler for high-end products such as thermally conductive silicone, electronic packaging materials, and medical implants.

Addressing the pain points of traditional modification processes (such as ball milling and stirring), which have low efficiency and uneven coating, the honeycomb mill reconstructs the modification process based on the concept of continuous mechanochemical force, integrating four functions: deep drying, depolymerization dispersion, nano-coating, and powder spheronization, to achieve efficient overall process synergy.

The honeycomb mill uses high-speed rotating depolymerization wheels to instantly disperse agglomerated particles through shear force, and combined with negative pressure flash drying, eliminates agglomeration caused by temperature and interfacial tension during drying from the source. ； Modifying agents (silane coupling agents, stearic acid, etc.) are uniformly sprayed through a misting system and fully contact with alumina particles in turbulence. A monomolecular coating film is formed within 3 seconds. The coating rate is as high as 99.2%, and the activation rate is 99.8%. ； Negative pressure operation avoids dust pollution; the equipment structure is compact, energy consumption is low, and it supports large-scale continuous production.

The alumina treated by the honeycomb mill has significantly optimized surface physicochemical properties: Dispersibility leap: uniform pore size, increased steric hindrance, achieving nano-scale uniform dispersion in polymer matrices; compatibility breakthrough: interfacial tension matching, improved bonding strength with plastic and rubber substrates. 40%； Enhanced stability: For example, after coating, the hydrolysis resistance of aluminum nitride powder is improved, meeting the stringent requirements of high-end electronic packaging; application scenario expansion: from the traditional flame retardant field to 5G thermally conductive substrates, new energy battery diaphragms, high-end coatings, and other high value-added scenarios.

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