Densification of thermodynamically unstable tin monoxide using cold sintering process

Sun Hwi Bang, Thomas Herisson De Beauvoir, Clive A. Randall

Research output: Contribution to journalArticle

Abstract

SnO is a thermodynamically unstable phase and undergoes thermal decomposition into SnO2 and Sn at a relatively low temperature when heating under ambient conditions. With the cold sintering process (CSP), SnO can be densified up to 89% of theoretical density within 100 min by applying uniaxial pressure of 350 MPa and transient liquid phase. 15-fold BET specific surface area reduction is observed between the ball-milled powder and the cold-sintered pellet, indicating experimental evidence of sintering. The temperature profiles of 70–265 °C show densification while maintaining the phase purity. Water and 2 M acetic acid solution are studied as transient liquid phases which promotes dissolution-precipitation on the particle surface and induces crystalline texture. Electrical properties of the cold sintered bulk, notably electrical conductivity and Seebeck coefficient, are measured as a function of temperature.

Original languageEnglish (US)
Pages (from-to)1230-1236
Number of pages7
JournalJournal of the European Ceramic Society
Volume39
Issue number4
DOIs
StatePublished - Apr 1 2019

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Tin
Densification
Sintering
Seebeck coefficient
Liquids
Acetic acid
Specific surface area
Acetic Acid
Powders
Temperature
Dissolution
Electric properties
Pyrolysis
Textures
Crystalline materials
Heating
Water

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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title = "Densification of thermodynamically unstable tin monoxide using cold sintering process",
abstract = "SnO is a thermodynamically unstable phase and undergoes thermal decomposition into SnO2 and Sn at a relatively low temperature when heating under ambient conditions. With the cold sintering process (CSP), SnO can be densified up to 89{\%} of theoretical density within 100 min by applying uniaxial pressure of 350 MPa and transient liquid phase. 15-fold BET specific surface area reduction is observed between the ball-milled powder and the cold-sintered pellet, indicating experimental evidence of sintering. The temperature profiles of 70–265 °C show densification while maintaining the phase purity. Water and 2 M acetic acid solution are studied as transient liquid phases which promotes dissolution-precipitation on the particle surface and induces crystalline texture. Electrical properties of the cold sintered bulk, notably electrical conductivity and Seebeck coefficient, are measured as a function of temperature.",
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Densification of thermodynamically unstable tin monoxide using cold sintering process. / Bang, Sun Hwi; Herisson De Beauvoir, Thomas; Randall, Clive A.

In: Journal of the European Ceramic Society, Vol. 39, No. 4, 01.04.2019, p. 1230-1236.

Research output: Contribution to journalArticle

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AB - SnO is a thermodynamically unstable phase and undergoes thermal decomposition into SnO2 and Sn at a relatively low temperature when heating under ambient conditions. With the cold sintering process (CSP), SnO can be densified up to 89% of theoretical density within 100 min by applying uniaxial pressure of 350 MPa and transient liquid phase. 15-fold BET specific surface area reduction is observed between the ball-milled powder and the cold-sintered pellet, indicating experimental evidence of sintering. The temperature profiles of 70–265 °C show densification while maintaining the phase purity. Water and 2 M acetic acid solution are studied as transient liquid phases which promotes dissolution-precipitation on the particle surface and induces crystalline texture. Electrical properties of the cold sintered bulk, notably electrical conductivity and Seebeck coefficient, are measured as a function of temperature.

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