Mechanical strength of cold-sintered zinc oxide under biaxial bending
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Zinc oxide is densified to 97% by the cold sintering process using an aqueous zinc acetate solution as the secondary transport phase. The mechanical response of the cold-sintered zinc oxide ceramics is investigated through the ball-on-three-balls biaxial bending technique. The analysis demonstrates that ZnO cold-sintered samples follow a Weibull distribution with a characteristic strength (σ0 ~ 65 MPa) and Weibull modulus (m ~ 8). Phase purity and residual secondary phases were analyzed via X-ray diffraction and Raman spectroscopy. This report provides an initial demonstration of the mechanical properties of cold-sintered parts in the as-pressed and unmodified state and serves for comparison with conventionally prepared ceramics.
The authors would like to thank members of the Pennsylvania State University for the use of their equipment including Alexander Wilson-Heid and Professor Allison Beese, the Huck Institutes of the Life Sciences’ Microscopy and Cytometry Facility, and the Materials Characterization Lab’s Raman Facility. This material is based upon work supported by the National Science Foundation, as part of the Center for Dielectrics and Piezoelectrics under Grant Nos. IIP-1361571 and 1361503. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1252376. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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Conflicts of interest
The authors declare that they have no conflict of interest.
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