Direct ink writing of macroporous lead-free piezoelectric Ba0.85Ca0.15Zr0.1Ti0.9O3
authors Nan, B; Olhero, S; Pinho, R; Vilarinho, PM; Button, TW; Ferreira, JMF
nationality International
journal JOURNAL OF THE AMERICAN CERAMIC SOCIETY
author keywords direct ink writing; lead-free piezoelectrics; powder surface treating; viscoelasticity
keywords DEPOSITION; CERAMICS; LASER; FABRICATION; HYDROLYSIS; COMPONENTS; POWDERS
abstract Direct ink writing (DIW) has become a widespread additive manufacturing technique for material engineering, but its application in lead-free Ba0.85Ca0.15Zr0.1Ti0.9O3 piezoelectric ceramics from aqueous systems has not been reported so far to our knowledge. The main obstacle is the high extent of hydrolysis reactions undergone by the starting powders when dispersed in water, hindering the attainment of stable water-based colloidal suspensions. This paper reports on the preparation of stable aqueous inks from a deagglomerated and surface-treated powder synthesized by solid-state reaction and on DIW of macroporous lead-free piezoelectrics. Based on zeta potential and rheological measurements, the optimal amounts of processing additives (dispersant, binder, and coagulating agent) were selected to transform the initial fluid suspension to a viscoelastic paste with sufficient stiffness and stability for the printing process. Dielectric and piezoelectric properties of samples sintered under different temperatures were also investigated.
publisher WILEY
issn 0002-7820
year published 2019
volume 102
issue 6
beginning page 3191
ending page 3203
digital object identifier (doi) 10.1111/jace.16220
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000465347700018
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