Scaling up the cold sintering process of ceramics

Jabr, Abdullah; Jones, Haley N.; Argüelles, Andrea P.; Trolier-McKinstry, Susan; Randall, Clive A.; Bermejo, Raúl

doi:10.1016/j.jeurceramsoc.2023.04.061

Cited by 16 publications

(1 citation statement)

References 27 publications

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“…Better control of the kinetics of solvent removal from the powder compact has been identified as a key parameter for reducing the critical pressure required to fully densify and scale-up the cross-sectional area of a sintered part. 29,30 Solvent optimization has been studied on a case-by-case basis, 31 and it was recently shown that a layered Zn-acetate-hydrate phase acts as an important transport layer between grains. 32 However, the details of the kinetics governing mass transport are system dependent and complex.…”

Section: Introductionmentioning

confidence: 99%

In situ observation of the multistep process of cold sintering

Maier

2024

J Am Ceram Soc.

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A compact cold sintering stage was constructed to densify ceramic samples in capillary tubes for the purpose of conducting in situ experiments designed to elucidate fundamental cold sintering mechanisms. The stage was used to successfully densify samples composed of ZnO/CH₃COOH mixtures under a range of pressures (25–175 MPa) over a modest temperature range (room to 150°C) in capillary tubes (0.75 mm inner diameter). The progression of the cold sintering process of ZnO was monitored by both piston displacement and a camera. These measurements allowed the strain rate and fluid extraction during densification to be recorded. The results of these measurements are compared to existing models of cold sintering and pressure solution creep, and direct correlations are observed between abrupt changes to the densification rate during constant heating rate experiments and the observation of solvent extraction from the powder compact.

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Section: Introductionmentioning

confidence: 99%

In situ observation of the multistep process of cold sintering

Maier

2024

J Am Ceram Soc.

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Cold sintering of perovskite‐based mixed conducting membrane for oxygen separation

Zhou,

Fan,

Jiang

et al. 2024

AIChE Journal

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Cold sintering has attracted significant attention as its remarkably rapid densification process at low sintering temperatures leads to considerable energy savings. However, the sintering behaviors of cold‐sintered perovskite ceramics remain poorly understood and lack precise control over material microstructure. Here, we fabricated dense SrCo0.8Fe0.2O3−δ (SCF) ceramic oxygen permeation membranes by cold sintering. Adding an appropriate ratio of sub‐micron SCF particles can better bridge the sintering interspaces between micron particles, generate amorphous phase through “dissolution‐precipitation,” and aid in the initial densification. The average relative density of SCF membranes undergoes a significant increase to 95.9% after cold sintering and post‐annealing at 900°C, which is much lower than the temperature required for conventional high‐temperature solid‐state sintering (>1200°C). The oxygen permeation flux of the prepared SCF perovskite membrane reaches 2.8 mL min−1 cm−2, which proves that this method has the potential to be an excellent sintering technique for dense perovskite ceramic membranes.

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