|About this Abstract
|MS&T23: Materials Science & Technology
|Manufacturing and Processing of Advanced Ceramic Materials
|Manufacturing Feasibility of the Cold Sintering Process for Large-scale Ceramic Dielectrics
|Christopher Wheatley, Clive A Randall, Andrea P ArgŁelles
|On-Site Speaker (Planned)
The Cold Sintering Process (CSP) has allowed the creation of high relative density materials at much lower temperatures than conventional sintering by the addition of a transient liquid phase. However, the limitations regarding the size of cold-sintered materials have not been fully explored. The motivation for this study is to determine if the microstructure changes with increasing scale, namely, sample thickness and diameter. In this work, a model dielectric material, sodium molybdate (Na2Mo2O7) has been manufactured up to 25-mm in diameter and at various aspect ratios to determine the effectiveness of CSP on a larger scale. Statistical analysis showed that the samples from each group were consistent, as evidenced by their ultrasonic longitudinal wave speed average of 4,460 m/s and low signal attenuation averaging at 109 Np/m. Electrical results were also found to be consistent with a relative permittivity averaging at 13 and a dielectric loss tangent average of 1.1E-03.