In-Situ Observation on the Agglomeration and Dispersion of Particles at the Interface of High-temperature Melts
- 15 March 2021
- journal article
- research article
- Published by Iron and Steel Institute of Japan in ISIJ International
- Vol. 61 (3), 753-762
- https://doi.org/10.2355/isijinternational.isijint-2020-585
Abstract
Understanding the mechanism of particle aggregation and dispersion at a liquid surface is important for the design and fabrication of novel materials. The behaviors of particles with various compositions at the interface of high-temperature melts, including the rapid growth of particles, the linear aggregation or curvilinear motion, and the wetting and separation processes, were observed in situ by high-temperature confocal laser scanning microscopy (HT-CLSM). We experimentally investigated the interaction force on particle pairs as a function of the interparticle distance and the size, composition and shape of particles. The experimental results indicate the attractive force between particle pairs decreases with increasing distance, and it increases as the size of the guest particle increases. The acting length of particles increases in the order of the alumina-magnesia particle (30 µm)< calcium aluminate particle with low CaO contents (80 µm)in situ observation increases in the order of Al2O3·35%CaO< Al2O3·19%MgO < Al2O3·38%MgO < Al2O3·15%CaO < Al2O3. The complex selective attraction has been observed in the in situ experiments which is attributed to the polydirectional attractive force and anisotropy in the particle morphology. The relationship between the roundness with acceleration rate of particles indicates that the attraction between spherical particles tends to be less than the attraction between irregular particles with edges.Keywords
This publication has 57 references indexed in Scilit:
- Behavior of Inclusions in Deoxidation Process of Molten Steel with in Situ Produced Mg VaporISIJ International, 2007
- Self-Assembly of CdTe Nanocrystals into Free-Floating SheetsScience, 2006
- Shape of the Capillary Meniscus around an Electrically Charged Particle at a Fluid Interface: Comparison of Theory and ExperimentLangmuir, 2006
- Supramolecular Assembly of Nanoparticles at Liquid–Liquid InterfacesAngewandte Chemie, 2005
- Mesoscale Self-Assembly of Hexagonal Plates Using Lateral Capillary Forces: Synthesis Using the “Capillary Bond”Journal of the American Chemical Society, 1999
- Formation of two-dimensional colloidal voids, soap froths, and clustersPhysical Review E, 1998
- Characteristics of Agglomeration of Various Inclusion Particles on Molten Steel Surface.ISIJ International, 1997
- "In-situ" Observation of Collision, Agglomeration and Cluster Formation of Alumina Inclusion Particles on Steel Melts.ISIJ International, 1997
- Theoretical descriptions of membrane filtration of colloids and fine particles: An assessment and reviewAdvances in Colloid and Interface Science, 1995
- Direct observation of two-dimensional, dynamic clustering and ordering with colloidsPhysical Review Letters, 1985