Effect of particle size on powder compaction and tablet strength using limestone

Cabiscol, Ramon; Shi, Hao; Wünsch, Isabell; Magnanimo, Vanessa; Finke, Jan Henrik; Luding, Stefan; Kwade, Arno

doi:10.1016/j.apt.2019.12.033

Cited by 39 publications

(15 citation statements)

References 40 publications

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“…For example, particle adhesion often dictates the final properties of pharmaceutical products, such as tablets. Moreover, uncontrolled particle adhesion can lead to powder manufacturing problems, resulting in a loss of product. − In addition, minimizing particle adhesion to surfaces is critical in the semiconductor industry, where surface contamination can significantly impact semiconductor production. , Particle adhesion also plays an important role in explosive detection systems, in the design of colloidal dispersions that are stable against aggregation, and in the development of biomimetic polymers. − …”

Section: Introductionmentioning

confidence: 99%

Toward an Improved Method for Determining the Hamaker Constant of Solid Materials Using Atomic Force Microscopy. II. Dynamic Analysis and Preliminary Validation

2021

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The further development of an existing approach-to-contact atomic force microscopy (AFM) method for determining the Hamaker constant, A, of a solid nondeformable material is presented. Upon explicitly accounting for the surface roughness of the given substrate, an estimate of A is directly obtained from the resulting distribution of deflections of the AFM cantilever tip at first contact with the surface, d c. We explore the effects of surface roughness on the resulting d c distributions for several model surfaces. We also analyze the dynamic behavior of the cantilever tip for a range of cantilever approach speeds. At sufficiently slow approach speeds, the dynamic d c distributions are nearly identical to those obtained in the quasi-static limit. Consequently, a method is proposed whereby the relative entropy between the dynamic and quasi-static distributions is used to estimate the value of A. Finally, an experimental test of the method is performed in which the self-Hamaker constant of an amorphous silica surface is determined to be in excellent agreement with the literature established value. Because the surface topography is directly included in the method, the uncertainty in the estimation of the self-Hamaker constant is also significantly reduced, compared to other similar approaches.

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Section: Introductionmentioning

confidence: 99%

Toward an Improved Method for Determining the Hamaker Constant of Solid Materials Using Atomic Force Microscopy. II. Dynamic Analysis and Preliminary Validation

2021

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“…However, theoretical modeling of the compaction process remains a complicated task. Although many equations have been proposed in the last decades to try to link the confining pressure to the compactness [50,51,52,53], most of them are based on empirical strategies with no apparent physical bases, requiring several fitting parameters. Only recently, a systematic approach, based entirely on micromechanical parameters and free of any ad hoc parameters, has been proposed and numerically tested in the case of hyperelastic circular, polygonal, and spherical shapes under different frictionnal conditions [45,46].…”

Section: Compressing Squishy Particle Assembliesmentioning

confidence: 99%

Softer than soft: diving into squishy granular matter

Barés¹,

Cárdenas-Barrantes²,

Cantor³

et al. 2022

Preprint

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Softer than soft, squishy granular matter is composed of grains capable of significantly changing their shape (typically larger than 10% of deformation) without tearing or breaking. Because of the difficulty to test these materials experimentally and numerically, such a family of discrete systems remains largely ignored in the granular matter physics field despite being commonly found in nature and industry. Either from a numerical, experimental, or analytical point of view, the study of highly deformable granular matter involves several challenges covering, for instance: (i) the need to include a large diversity of grain rheology, (ii) the need to consider large material deformations, and (iii) the analysis upon the effects the large body distortion has on the global scale. In this article, we propose a thorough definition of these squishy granular systems, and we summarize the upcoming challenges in their study.

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“…Some attempts have also been made for the utilization of limestone and tuff powders as mineral admixtures. e limestone powder obtained by grinding limestone parent rock is widely acknowledged as a low-activity or inert material, but it has positive effect on the early hydration acceleration of aluminum-and silicon-phase minerals in the cement clinker, which contributes to its filling, nucleation, dilution, and chemical effects (Ramon et al [9]; Liu and Yan [10]; Wang et al [11]). Limestone powder was also reported to be effective to inhibit AAR [12]; that is, the expansion ratios at 14 days and 28 days of mortar are both less than 0.10% when more than 45 wt.% of limestone powder, 15 wt.% of limestone powder and 30 wt.% of FA or the combination of 25 wt.% of limestone powder and 25 wt.% of FA are added, respectively.…”

Section: Introductionmentioning

confidence: 99%

Alkali‐Active Sand Slate Powder for Use as Mineral Admixture in Mass Hydraulic Concrete: Technical and Economic Analysis

Chen

Zhou

Peng

et al. 2021

Advances in Materials Science and Engineering

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This work has launched a comprehensive investigation on the macro performance and micro structure of mass concrete produced with alkali-active sand slate powder (ASSP) for use as the mineral admixture and a thorough analysis on its technical and economic effects is also conducted. Results indicated ternary blend with hybrid of 5–8 wt.% silica fume (SF) and 15–20 wt.% ASSP has the optimal compressive and flexural strength. ASSP particle participates in hydration, accelerates hydration of cement clinker within 8.5 hours, and reduces the autogenous strain of pastes by 164 × 10−6 in case of dosage less than 25% by mass. Improvement in the mechanical and deformation properties of concrete produced with the hybrid of SF and ASSP is attributed to better particles gradation, compactness enhancement, and transformation in products of hydration. On the whole, it provides another new approach for use of alkali-active rock after second processing as mineral admixture in hydraulic concrete in terms of good performance and economic effects.

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Effect of particle size on powder compaction and tablet strength using limestone

Cited by 39 publications

References 40 publications

Toward an Improved Method for Determining the Hamaker Constant of Solid Materials Using Atomic Force Microscopy. II. Dynamic Analysis and Preliminary Validation

Toward an Improved Method for Determining the Hamaker Constant of Solid Materials Using Atomic Force Microscopy. II. Dynamic Analysis and Preliminary Validation

Softer than soft: diving into squishy granular matter

Alkali‐Active Sand Slate Powder for Use as Mineral Admixture in Mass Hydraulic Concrete: Technical and Economic Analysis

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