Archive | 2019
Particle size influence on material properties of BaTiO3 ceramics fabricated using freeze-form extrusion 3D printing
Abstract
Barium titanate (BaTiO3; BTO) is a well-known lead-free piezoelectricmaterial commonly used for sensors and actuators applications. There are several traditionalmethods to fabricate bulk BTO ceramics; however,most of thosemethods have restrictions regarding being able to produce a functional and complex shape for specific application needs. Recently, additivemanufacturing techniques such as binder jetting have enabled the fabrication of complex designs of piezoelectric ceramics. However, the density achieved is relatively low thus narrowing their applications. This paper presents the fabrication of high-density BaTiO3 ceramics using Freeze-formExtrusion Fabrication (FEF). The influence onmaterial properties for different ceramic particle size was assessed. It was found that parts printed using finer BaTiO3 particle sizes achieved better results in terms of density, piezoelectric, and dielectric properties. For this study, the 100 nmBaTiO3 samples achieved 85.24% density, a high piezoelectric property of 204.61pC/Nand dielectric permittivity of 2551. These results demonstrated the feasibility of using FEF additivemanufacturing to fabricate high-quality functional ceramics with designed geometry in amold-free fashion.