Understanding aqueous dispersion, rheological properties and colloidal stabilisation mechanisms of hierarchically assembled ceramic powders is important for progress in the fields of catalysis, separation and/or adsorption. The present study was designed to evaluate the rheological and sedimentation behaviour of highly loaded aqueous suspensions (up to φ_A = 0.126) containing AlN-powder-hydrolysis-derived, micron-sized, mesoporous, gamma alumina (MA) particulates with a high surface area (∼180 m²/g) dispersed with sodium polyacrylate (NaPAA). The as-prepared suspensions were prone to sedimentation and segregation. However, when divalent cations (Mg²⁺, Ca²⁺) or cellulose nanofibers were added, the formation of interparticle association networks in the aqueous suspensions containing MA particles was triggered, facilitating their long-term resistance to sedimentation lasting more than 12 weeks.

了解分层组装的陶瓷粉末的水分散性，流变性质和胶体稳定机理对于催化，分离和/或吸附领域的进展很重要。本研究的目的是高负荷的水性悬浮液的流变学和沉降行为评估（高达φ_甲= 0.126）含有AlN粉末水解衍生的，微米尺寸的中孔，γ-氧化铝（MA）的颗粒具有高表面面积（约180 m ² / g）分散有聚丙烯酸钠（NaPAA）。所制备的悬浮液易于沉淀和离析。但是，当二价阳离子（Mg 2 ⁺，Ca ²⁺）或添加纤维素纳米纤维，引发了在包含MA颗粒的水悬浮液中形成颗粒间缔合网络，促进了其对沉淀的长期抵抗力超过12周。