In this paper, the hierarchical solid structures and multiscale pore structures inside fluidized nanoparticle agglomerates (FNPAs) are qualitatively revealed in the transmission electron microscope (TEM) images of ultrathin slices of solidified FNPAs from the bottom of the bed. The micromorphology of aggregates and simple agglomerates, the porosities of pores intra and inter simple agglomerates, and pore size distributions inside FNPAs are quantitatively analyzed by image analysis. The average fractal dimensions of aggregates of about 300 nm‐1000 nm and simple agglomerates of several micrometres are around 1.9 and 2.6 respectively. The pore structure of FNPAs is complex and heterogeneous and displays a multiscale feature. Nearly 50% of the pores intra simple agglomerates have sizes of tens of nanometers and more than half the pores between simple agglomerates are of micrometre scale. The porosities of the pores intra and inter simple agglomerates are about 0.82 and 0.85 respectively.

中文翻译：

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TEM图像分析流态化纳米颗粒团聚体微观结构的实验研究

本文从流化床底部的超薄凝固FNPA薄片的透射电子显微镜（TEM）图像中定性地揭示了流化纳米颗粒团聚体（FNPA）内部的分层固体结构和多尺度孔结构。通过图像分析定量分析了聚集体和简单附聚物的微观形态，内部和内部简单附聚物的孔隙率以及FNPA内部的孔径分布。聚集体的平均分形维数约为300 nm-1000 nm，简单的团聚体为几微米，分别约为1.9和2.6。FNPAs的孔结构复杂且异质，并显示出多尺度特征。简单附聚物内的孔的近50％具有数十纳米的尺寸，并且简单附聚物之间的孔的一半以上是微米级的。内部和内部简单附聚物的孔的孔隙率分别为约0.82和0.85。