Electromechanical Properties of Robocasted Barium Titanate Ceramics. Issue 9 (21st June 2020)

• Record Type: Journal Article
• Authors: Lorenz, Mylena; Martin, Alexander; Webber, Kyle G.; Travitzky, Nahum
• Other Names: Boccaccini Aldo guestEditor.; Göken Mathias guestEditor.; Travitzky Nahum guestEditor.
• Is Part Of: Advanced engineering materials. Volume 22:Issue 9(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-06-21
• Subjects: 3D printing -- cold isostatic pressing -- electromechanical transducer -- piezoelectric coefficient -- robocasting; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.202000325
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : This work presents the fabrication of dense polycrystalline barium titanate (BaTiO3, BT) for electromechanical transduction using robocasting and cold isostatic pressing (CIP). The use of CIP as post‐treatment is proposed to eliminate defects and increase the density of robocasted parts to improve the piezoelectric performance. For robocasting, pastes containing 50 and 52 vol% are developed; the resulting green robocasted parts are CIPed at 100 and 150 MPa. Using this proposed technique, samples robocasted with BT52 and CIPed at 150 MPa display a relative density of ≈98%, comparable with reference polycrystalline samples. In addition, an increase in both the piezoelectric charge and voltage coefficient is observed in robocasted parts, with the values up to 195 pC/N and 12 × 10 −3 Vm N −1, respectively. These values, which are comparable with previous studies of polycrystalline BT, indicate that the combined robocasting and CIP technique is a possible method for producing 3D printed piezoelectric sensors. Abstract : Additive manufacturing technologies for the fabrication of 3D parts possess advantages to the conventional forming techniques and demonstrate the possibility to enhance the electromechanical properties of ferroelectrics. This work presents robocasted dense polycrystalline barium titanate (BaTiO3, BT) for electromechanical transduction with enhanced piezoelectric charge (195 pC/N) and voltage coefficient (12 × 10 −3 Vm N −1 ) compared with conventionally produced samples.