The influence of solid loading in suspensions of a submicrometric alumina powder on green and sintered pressure filtrated samples

Michalková, Monika; Ghillányová, Katarína; Galusek, Dušan

doi:10.1016/j.ceramint.2009.07.032

Cited by 14 publications

(6 citation statements)

References 18 publications

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“…The properties of the resultant alumina ceramics were profoundly dependent on the characteristics of green bodies and wet cakes . The quality of wet cakes was determined by the properties of slurries . Therefore, the density difference between C‐PIBM and C‐PAANH 4 can be ascribed to the difference in properties of two slurries.…”

Section: Discussionmentioning

confidence: 99%

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Density difference in pressure‐filtrated wet cakes produced from spontaneous gelling slurries

Shimai

Jian-Gao

et al. 2019

J Am Ceram Soc

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Pressure filtration is a key process in ceramic forming; however, the influences of density difference in different parts of a pressure‐filtrated wet cake on subsequent drying and sintering have not yet been explored. In the present work, alumina slurries dispersed by copolymers of isobutylene and maleic anhydride (PIBM) and ammonium salt of polyacrylic acid (PAANH4) were pressure filtrated to examine the impacts of density difference in the as‐prepared wet cakes. In comparison to the wet cake produced from PAANH4, the wet cake with PIBM had much higher bulk density and smaller density difference between its upper and bottom parts (height of ~23 mm). Furthermore, in order to reveal the differences between these two wet cakes, the nature of agglomerates in their slurries was investigated. The slurry with PIBM contained agglomerates with a wider size distribution, bigger average size, and higher sphericity, producing a wet cake with a higher particle packing density and more homogeneous packing structure after pressure filtration. Hence, almost no deformation occurred in a large wet cake (280 mm × 130 mm × 20 mm) with PIBM, whereas that with PAANH4 experienced a severe deformation after sintering.

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Section: Discussionmentioning

confidence: 99%

“…15,16 The quality of wet cakes was determined by the properties of slurries. 17 Therefore, the density difference between C-PIBM and C-PAANH 4 can be ascribed to the difference in properties of two slurries.…”

Section: Discussionmentioning

confidence: 99%

Density difference in pressure‐filtrated wet cakes produced from spontaneous gelling slurries

Shimai

Jian-Gao

et al. 2019

J Am Ceram Soc

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“…As part of this study, Particle size (PS) and Particle Size Distribution (PSD), of the starting powders were manipulated, and the drying-shrinkage behavior of the powders was evaluated to assist us in reducing the warpage rate at the green stage. For slurry-based colloidal processing, high powder loading is critical to obtain a high packing density of the green body, which facilitates minimal drying and sintering shrinkage, reducing the final component warpage [10]. However, high powder loading is complex for fine powders due to the high tendency of agglomeration, so coarser particles were also used.…”

Section: Methodsmentioning

confidence: 99%

An Optimization of Particle Size and Additives of Slip Cast Alumina Samples to Reduce Warpage and Porosity

Sivamaran

Kavimani

Bakkiyaraj³

et al. 2022

Advances in Materials Science and Engineering

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Alumina body densification using slip casting was investigated with low warpage rates. In order to optimize slurry and sintering, 1600°C has been used. As a starting material, three types of alumina were used. Alumina has been used in conjunction with PMAA, and carboxymethyl cellulose in order to prepare the slurry. It was found that warpage rates were reduced when coarser particles were included in the composition. An acid treatment of the slurry was carried out in order to improve densification of the alumina body and to reduce warpage. This study examines the microstructure of a sintered alumina body. In the investigation, it was found that preparing a dense product reduced porosity and warping rate by 1.1% and 4%, respectively.

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“…The ceramic suspension consists of the oxide/non-oxide ceramic powder, solvent, dispersant, de-foaming agent, binder and plasticizer. Dispersants ensure the homogeneity of the suspension [5], binders and plasticizers are incorporated mainly for strength and flexibility of the green tape [6][7][8]. De-foaming agents are added to prevent formation of air bubbles in the suspension during the mixing process.…”

Section: Introductionmentioning

confidence: 99%

Comparison of aqueous and non-aqueous tape casting of fully stabilized ZrO2 suspensions

et al. 2015

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The influence of solid loading in suspensions of a submicrometric alumina powder on green and sintered pressure filtrated samples

Cited by 14 publications

References 18 publications

Density difference in pressure‐filtrated wet cakes produced from spontaneous gelling slurries

Density difference in pressure‐filtrated wet cakes produced from spontaneous gelling slurries

An Optimization of Particle Size and Additives of Slip Cast Alumina Samples to Reduce Warpage and Porosity

Comparison of aqueous and non-aqueous tape casting of fully stabilized ZrO2 suspensions

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