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Ultrafine aluminum hydroxideUltrafine aluminum hydroxide, a critical functional material for electronic, electrical, environmental, and chemical applications, suffers from performance-limiting particle agglomeration due to altered surface charge propertiesProperties at reduced particle sizes. This work systematically investigates the influence of pH, temperature, electrolyteElectrolyte type, and dispersantDispersant dosage on the powder's surface electrical behaviors. It was found that the content and type of charged ions affect the surface electrical propertiesProperties and potential value of the powders. The isoelectric point is 7.3, and the surface potential is negative when specifically adsorbing anions but it changes to positive when specifically adsorbing cations. The addition amounts of both high-valent ions and electrolyteElectrolyte-type dispersantsDispersant have a significant impact on the surface potential. DispersantDispersant concentration exhibits non-monotonic effects: initial enhancement followed by attenuation at higher concentrations. These results establish an optimal dispersantDispersant dosage for electrostatic stabilization, enabling agglomeration control in industrial processingProcessing.

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Surface Electrical Properties of Ultrafine Aluminum Hydroxide

  • 会议论文

  • 发表日期：

    2026年

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  • Wang Jianli,
  • Qin Nianyong,
  • Zhao Shanlei,
  • Chen Changhao

摘要

Ultrafine aluminum hydroxideUltrafine aluminum hydroxide, a critical functional material for electronic, electrical, environmental, and chemical applications, suffers from performance-limiting particle agglomeration due to altered surface charge propertiesProperties at reduced particle sizes. This work systematically investigates the influence of pH, temperature, electrolyteElectrolyte type, and dispersantDispersant dosage on the powder's surface electrical behaviors. It was found that the content and type of charged ions affect the surface electrical propertiesProperties and potential value of the powders. The isoelectric point is 7.3, and the surface potential is negative when specifically adsorbing anions but it changes to positive when specifically adsorbing cations. The addition amounts of both high-valent ions and electrolyteElectrolyte-type dispersantsDispersant have a significant impact on the surface potential. DispersantDispersant concentration exhibits non-monotonic effects: initial enhancement followed by attenuation at higher concentrations. These results establish an optimal dispersantDispersant dosage for electrostatic stabilization, enabling agglomeration control in industrial processingProcessing.