Evaluation of alumina slurry dispersion by nuclear magnetic resonance relaxation as a comparison to conventional dispersion evaluation methods. (13th June 2022)

• Record Type: Journal Article
• Authors: Shakirbay, Akerke; Choi, Jeong Sik; Kim, Dong Chul; Shin, Hyo Soon; Yeo, Dong Hun; Lee, Joon Hyung
• Is Part Of: Magnetic resonance in chemistry. Volume 60:Number 9(2022)
• Page Start: 877
• Page End: 883
• Publication Date: 2022-06-13
• Subjects: alumina slurry -- dispersion evaluation method -- NMR relaxation; Nuclear magnetic resonance spectroscopy -- Periodicals; Chemistry, Organic -- Periodicals; Magnetic resonance -- Periodicals; 538.36
• DOI: 10.1002/mrc.5291
• Languages: English
• ISSNs: 0749-1581

Abstract

Abstract: In this paper, we evaluated the particle dispersion degree of alumina slurry containing a dispersant by solvent nuclear magnetic resonance (NMR) relaxation and compared it with conventional dispersion evaluation methods such as viscosity, particle size, and sedimentation height measurements. The dispersion of slurry was evaluated via numerical analysis of the transverse relaxation time (T2 ). The effect of the changes in different parameters of the experiment in terms of milling time, solid loading, and dispersant amount was investigated by NMR relaxation as well as conventional methods. The results of NMR relaxation measurements revealed that T2 correlates well with other dispersion evaluation methods; thus, it is an efficient technique to evaluate the dispersion of alumina slurry, specifically, when studying the effect of the change in milling time and dispersion amount. Abstract : Nuclear magnetic resonance (NMR) relaxation time was proposed as a method to evaluate the dispersion of slurry. The effect of the change in dispersion amount was studied. The graph shows that T2 and sedimentation height have the same pattern as well as viscosity and particle size exhibiting good dispersion at 1.2 wt%. The NMR relaxation is an excellent dispersion evaluation method that provided quantitative analysis.