A method for measuring inter-particle Hamaker constants in mineral materials using atomic force microscopy
Year: 2025
Type: conference-paper
Abstract: The rheological properties of cement slurry are primarily influenced by the spatial distribution of particles and their interaction forces.The Hamaker constant plays a crucial role in quantifying these interactions; however, its study has been limited due to technical constraints.Atomic force microscopy (AFM) can measure probe-to-particle surface interaction forces via the microcantilever deformation during the extension and retraction process, but it cannot directly measure particle-to-particle interaction forces.In view of this limitation, this paper introduces an AFM-based test method to quantify the interaction force between particles and a new approach for calculating the Hamaker constant.Using these methods, the particle-to-particle Hamaker constants of cement and fly ash in various environments were investigated.The measured Hamaker constants of different mineral materials ranged from 22.79 to 38.26 × 10 -20 J in air and from 4.79 to 14.47× 10 -20 J in water.The primary factors influencing Hamaker constant were the material properties and the test environment.
DOI: 10.21012/fc12.1128
Authors: Hua Qiang Yuan, Zhi Ge, Hong Zhi Zhang
Institutions: Ningxia University, Shandong University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W4409410789