Cold densification and sintering of nanovaterite by pressing with water

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Matthias Haug
  • Florian Bouville
  • Cristina Ruiz-Agudo
  • Jonathan Avaro
  • Denis Gebauer
  • Andre R. Studart

Organisationseinheiten

Externe Organisationen

  • ETH Zürich
  • Universität Konstanz
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Details

OriginalspracheEnglisch
Seiten (von - bis)893-900
Seitenumfang8
FachzeitschriftJournal of the European Ceramic Society
Jahrgang40
Ausgabenummer3
Frühes Online-Datum24 Okt. 2019
PublikationsstatusVeröffentlicht - März 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.

ASJC Scopus Sachgebiete

Zitieren

Cold densification and sintering of nanovaterite by pressing with water. / Haug, Matthias; Bouville, Florian; Ruiz-Agudo, Cristina et al.
in: Journal of the European Ceramic Society, Jahrgang 40, Nr. 3, 03.2020, S. 893-900.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Haug M, Bouville F, Ruiz-Agudo C, Avaro J, Gebauer D, Studart AR. Cold densification and sintering of nanovaterite by pressing with water. Journal of the European Ceramic Society. 2020 Mär;40(3):893-900. Epub 2019 Okt 24. doi: 10.1016/j.jeurceramsoc.2019.10.034
Haug, Matthias ; Bouville, Florian ; Ruiz-Agudo, Cristina et al. / Cold densification and sintering of nanovaterite by pressing with water. in: Journal of the European Ceramic Society. 2020 ; Jahrgang 40, Nr. 3. S. 893-900.
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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. ",
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AU - Haug, Matthias

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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.

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KW - Ceramics

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