The inferences of ZnO additions for LKNNT lead-free piezoelectric ceramics. Issue 168 (2nd January 2016)

• Record Type: Journal Article
• Authors: Cheng, Chien-Min; Pei, Ching-Hsing; Chen, Mei-Li; Chen, Kai-Huang
• Is Part Of: Integrated ferroelectrics. Issue 168(2016)
• Page Start: 61
• Page End: 68
• Publication Date: 2016-01-02
• Subjects: Liquid-phase sintering -- lead-free -- piezoelectric -- ZnO; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2016.1159095
• Languages: English
• ISSNs: 1058-4587

Abstract

ABSTRACT: By the conventional solid-state liquid-phase sintering technique, Li0.058 (K0.480 Na0.535 )0.966 (Nb0.9 Ta0.1 )O3 + x wt% ZnO (x = 0, 0.2, 0.4, 0.6, 0.8, 1, 3) lead-free piezoelectric ceramics were fabricated. The addition of ZnO liquid-phase sintering promoters could improve the grain-growth of LKNNT ceramics significantly and its inferences were investigated detailed in this paper. The crystal phases and micro-structures were analyzed by means of the X-ray diffraction and scanning electronic microscopy, respectively. Using the impedance analyzer, the dielectric constant, loss tangent, Curie temperature, phase transition point, and electromechanical coupling factor were measured. And the piezoelectric constants were measured by the d33 meter. Compared to pure LKNNT ceramic (sintered at 1090°C, d33 = 279 pC/N, and kp = 0.46), for x = 0.6 specimen, even though the optimal d33 and kp values were only 272 pC/N and kp = 0.44, but the optimal sintering temperature have been improved from 1090°C to 1020°C successfully.