In this study, we measure the properties of barium titanate (BaTiO3) piezoceramic discs that have been binder jet printed and infiltrated with epoxy. Binder jet printing is a scalable and relatively inexpensive additive manufacturing technique. With binder jet printing, it is possible to produce atypical geometries, and large quantities of transducers on demand without expensive tooling. However, there are many practical challenges with binder jet printing ceramics, and sintered parts tend to have relatively low densities. We seek to address these challenges and explore the suitability of binder jet printing piezoelectric transducers and active materials. In this presentation we will discuss our techniques for printing and post-processing BaTiO3 ceramic discs. We will discuss porosity, and how epoxy infiltration can improve the functionality of discs. We will present measurements of discs fabricated using a traditional pressing method and measurements of printed discs. These measurements include density, dielectric permittivity, piezoelectric coefficient d33, impedance and dielectric loss. From our measurements, we will attempt to model relationships between printing parameters and final properties. Printing and powder processing techniques that can increase relative density of sintered parts will also be discussed. [Work sponsored by the Office of Naval Research Distribution A: Approved for public release.]
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