Electrophoretic deposition and properties of strontium-doped sodium potassium niobate thick films. Issue 16 (December 2017)

• Record Type: Journal Article
• Authors: Mercier, Hugo; Malič, Barbara; Uršič, Hana; Hreščak, Jitka; Levassort, Franck; Kuscer, Danjela
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 16(2017)
• Page Start: 5305
• Page End: 5313
• Publication Date: 2017-12
• Subjects: Sodium-potassium niobates -- Electrophoretic deposition -- Thick films -- Finite-element method -- Piezoresponse force microscopy; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.06.030
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: We have processed strontium-modified potassium sodium niobate (KNNSr) piezoelectric thick films on metalized alumina by electrophoretic deposition and sintering for energy-harvesting applications. The deposition yield, the electric field in the close vicinity of the planar working electrode (calculated with a finite-element method) and the thickness profiles of the as-deposited layers were examined for ethanol-based suspensions with different conductivities, deposition times, inter-electrode distances and sizes of the counter electrode. Uniformly thick and defect-free, as-deposited KNNSr layers were processed from a suspension with a conductivity of 21.2 μS/cm, deposited for 90 s, for an inter-electrode distance of 3 mm and a diameter of the counter electrode similar to the sample's dimensions. KNNSr layers sintered at 1100 °C with a thickness of 30 μm and a relative density of 75% exhibited a dielectric permittivity of 325, dielectric losses of 0.04 at 10 kHz and room temperature, and a d33 coefficient of 60 pC/N.