Cold Sintering: A Paradigm Shift for Processing and Integration of Ceramics |
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| Authors: | Dr Jing Guo Dr Hanzheng Guo Amanda L Baker Prof Michael T Lanagan Dr Elizabeth R Kupp Prof Gary L Messing Prof Clive A Randall |
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| Institution: | 1. Materials Research Institute and Department of Materials Science & Engineering, The Pennsylvania State University, University Park, PA, USA;2. Materials Research Institute, Department of Materials Science & Engineering and Department of Engineering Science & Mechanics, The Pennsylvania State University, University Park, PA, USA |
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| Abstract: | This paper describes a sintering technique for ceramics and ceramic‐based composites, using water as a transient solvent to effect densification (i.e. sintering) at temperatures between room temperature and 200 °C. To emphasize the incredible reduction in sintering temperature relative to conventional thermal sintering this new approach is named the “Cold Sintering Process” (CSP). Basically CSP uses a transient aqueous environment to effect densification by a mediated dissolution–precipitation process. CSP of NaCl, alkali molybdates and V2O5 with small concentrations of water are described in detail, but the process is extended and demonstrated for a diverse range of chemistries (oxides, carbonates, bromides, fluorides, chlorides and phosphates), multiple crystal structures, and multimaterial applications. Furthermore, the properties of selected CSP samples are demonstrated to be essentially equivalent as samples made by conventional thermal sintering. |
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| Keywords: | ceramics cold sintering composites hydrothermal synthesis sintering |
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