Toward a size scale-up cold sintering process at reduced uniaxial pressure

Sun Hwi Bang, Kosuke Tsuji, Arnaud Ndayishimiye, Sinan Dursun, Joo Hwan Seo, Stephen Otieno, Clive A. Randall

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Cold sintering is a low-temperature powder process methodology that enables the densification of ceramics and ceramic-based composites at significantly reduced times and temperatures. Although the general notion of required pressure for the cold sintering is in the hundreds MPa, some material systems were reasonably demonstrated to be densified in the pressure below 50 MPa, which allows to increase the sample size up to 25 cm2 using a small tabletop laboratory press. Indeed, the pressure requirement has been a major constraint on promoting its application deployments, but this study is intended to propose a path to alleviate that limitation. Five different ceramic and composite systems (three ZnO-based composites, Li1.5Al0.5Ge1.5(PO4)3, and zeolite Y) with applications in electronic, structural, and energy storage were investigated as a preliminary example of the size scale-up process. One of the observed challenges of the scale-up process was to obtain homogeneous microstructure all over the sample as the transient phase evaporation rate may be different upon the localization. In the case of ZnO, the inhomogeneous pellet translucency may pertain to partial anisotropic grain growth within the same sample.

Original languageEnglish (US)
Pages (from-to)2322-2327
Number of pages6
JournalJournal of the American Ceramic Society
Issue number4
StatePublished - Apr 1 2020

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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