About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina & Bauxite
|
| Presentation Title |
Surface electrical properties of ultrafine aluminum hydroxide |
| Author(s) |
jianli Wang, Nianyong Qin, Shanlei Zhao , Changhao Chen |
| On-Site Speaker (Planned) |
jianli Wang |
| Abstract Scope |
Ultrafine aluminum hydroxide, a critical functional material for electronic, electrical, environmental, and chemical applications, suffers from performance-limiting particle agglomeration due to altered surface charge properties at reduced particle sizes. This work systematically investigates the influence of pH, temperature, electrolyte type, and dispersant dosage on the powder's surface electrical behaviors. It was found that the content and type of charged ions affect the surface electrical properties 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 electrolyte-type dispersants have a significant impact on the surface potential. Dispersant concentration exhibits non-monotonic effects: initial enhancement followed by attenuation at higher concentrations. These results establish an optimal dispersant dosage for electrostatic stabilization, enabling agglomeration control in industrial processing. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Powder Materials, Hydrometallurgy, Ceramics |