近日，天津大学龚俊波团队报道了球形结晶设计的团聚磨损导向策略：以氟化铝为例。这一研究成果发表在2026年5月12日出版的《颗粒学报》杂志上。

氟化铝（AlF₃）是一种重要的工业原料，广泛应用于铝电解和陶瓷领域，其性能关键取决于前驱体三水氟化铝（AFT）的粉体性质。然而，传统AFT晶体形貌不规则，导致流动性差、堆积密度低以及严重的结块问题。

研究组在不添加任何助剂的水溶液中成功制备了高球形度的AFT颗粒。通过离线与在线分析相结合的手段，他们阐明了由“团聚-磨蚀”过程主导的AFT球形团聚机制。在该机制指导下，利用响应面法系统优化了温度、搅拌速率和停留时间等关键工艺参数。在优化条件下，所得AFT颗粒的平均圆度达到90.74%，产率高达85.7%。与商业粉体相比，优化后的球形AFT在堆积密度和流动性上分别实现了30.1%和41.4%的最大提升，并表现出显著增强的抗结块性能。球形形貌与高产率的结合不仅提高了批次产能，还为连续化生产提供了潜力，为高品质AFT粉体的工业化制造提供了一条绿色且经济高效的途径。

附：英文原文

Title: Agglomeration-abrasion-oriented strategy for spherical crystallization design: The case of aluminum fluoride

Author: anonymous

Issue&Volume: 2026/05/12

Abstract: Aluminum fluoride (AlF3) is an essential industrial material widely used in aluminum electrolysis and ceramics, yet its performance depends critically on the powder properties of its precursor, aluminum fluoride trihydrate (AFT). However, conventional AFT crystals suffer from irregular morphologies, leading to poor flowability, low bulk density, and severe caking. In this study, we successfully prepared highly spherical AFT particles in an additive-free aqueous solution. Through integrated offline and in-situ analyses, we elucidated the AFT spherical agglomeration mechanism dominated by an "agglomeration-abrasion" process. Guided by this mechanism, key process parameters, including temperature, stirring rate, and residence time, were systematically optimized using response surface methodology. Under the optimized conditions, the resulting AFT particles achieved an average circularity of 90.74% and a high yield of 85.7%. Compared to commercial powders, the optimized spherical AFT exhibited maximum improvements of 30.1% in bulk density and 41.4% in flowability, along with significantly enhanced anti-caking properties. The combination of spherical morphology and high yield enhances batch capacity while offering potential for continuous production, providing a green and cost-effective route for the industrial manufacturing of high-quality AFT powders.

DOI: 10.1016/j.partic.2026.04.025

Source: https://www.sciencedirect.com/science/article/abs/pii/S167420012600180X