Details
| Original language | English |
|---|---|
| Pages (from-to) | 893-900 |
| Number of pages | 8 |
| Journal | Journal of the European Ceramic Society |
| Volume | 40 |
| Issue number | 3 |
| Early online date | 24 Oct 2019 |
| Publication status | Published - Mar 2020 |
Abstract
While dissolution-precipitation, plastic deformation and fracture have been proposed to explain the compaction of carbonates in geological formations, the role of these mechanisms on the densification process of calcium carbonate nanoparticles in synthetic systems remains poorly understood. Here, we systematically investigate the effect of pH of the aqueous phase (1 ≤ pH ≤ 7), temperature (10 ≤ T ≤ 90 °C), and pressure (10 ≤ P ≤ 800 MPa) on the cold compaction of nanovaterite powder with water to shed light on the mechanisms underlying this unique densification. Compaction experiments reveal that the applied pressure plays a major role on the densification of vaterite nanopowder with water. Our experimental data thus suggest that plastic deformation or subcritical crack growth might be important densification mechanisms for vaterite nanoparticles. These findings provide a new perspective into the cold compaction of nanopowders with water and may open promising routes for the manufacturing of CO 2-based structural materials at mild processing conditions.
Keywords
- Ceramics, Cold sintering, Nanoparticles, Pressing, Vaterite
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Materials Chemistry
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In: Journal of the European Ceramic Society, Vol. 40, No. 3, 03.2020, p. 893-900.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Cold densification and sintering of nanovaterite by pressing with water
AU - Haug, Matthias
AU - Bouville, Florian
AU - Ruiz-Agudo, Cristina
AU - Avaro, Jonathan
AU - Gebauer, Denis
AU - Studart, Andre R.
N1 - Funding Information: The authors wish to thank Thomas Weber from the X-Ray platform for the support with the The Swiss National Science Foundation (consolidator grant BSCGIO_157696) is also gratefully acknowledged for supporting this research. Jonathan Avaro and Cristina Ruiz-Agudo thank SFB1214 (A2 and A7) and Zukunftskolleg for the financial support.
PY - 2020/3
Y1 - 2020/3
N2 - While dissolution-precipitation, plastic deformation and fracture have been proposed to explain the compaction of carbonates in geological formations, the role of these mechanisms on the densification process of calcium carbonate nanoparticles in synthetic systems remains poorly understood. Here, we systematically investigate the effect of pH of the aqueous phase (1 ≤ pH ≤ 7), temperature (10 ≤ T ≤ 90 °C), and pressure (10 ≤ P ≤ 800 MPa) on the cold compaction of nanovaterite powder with water to shed light on the mechanisms underlying this unique densification. Compaction experiments reveal that the applied pressure plays a major role on the densification of vaterite nanopowder with water. Our experimental data thus suggest that plastic deformation or subcritical crack growth might be important densification mechanisms for vaterite nanoparticles. These findings provide a new perspective into the cold compaction of nanopowders with water and may open promising routes for the manufacturing of CO 2-based structural materials at mild processing conditions.
AB - While dissolution-precipitation, plastic deformation and fracture have been proposed to explain the compaction of carbonates in geological formations, the role of these mechanisms on the densification process of calcium carbonate nanoparticles in synthetic systems remains poorly understood. Here, we systematically investigate the effect of pH of the aqueous phase (1 ≤ pH ≤ 7), temperature (10 ≤ T ≤ 90 °C), and pressure (10 ≤ P ≤ 800 MPa) on the cold compaction of nanovaterite powder with water to shed light on the mechanisms underlying this unique densification. Compaction experiments reveal that the applied pressure plays a major role on the densification of vaterite nanopowder with water. Our experimental data thus suggest that plastic deformation or subcritical crack growth might be important densification mechanisms for vaterite nanoparticles. These findings provide a new perspective into the cold compaction of nanopowders with water and may open promising routes for the manufacturing of CO 2-based structural materials at mild processing conditions.
KW - Ceramics
KW - Cold sintering
KW - Nanoparticles
KW - Pressing
KW - Vaterite
UR - http://www.scopus.com/inward/record.url?scp=85075359772&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2019.10.034
DO - 10.1016/j.jeurceramsoc.2019.10.034
M3 - Article
VL - 40
SP - 893
EP - 900
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 3
ER -