Domain Structure of Poled (K0.50Na0.50)1−xLixNbO3 Ceramics with Different Stabilities. Issue 3 (27th November 2014)

• Record Type: Journal Article
• Authors: Zhang, Jialiang; Tian, Xing; Gao, Yong; Yao, Weizeng; Qin, Yalin; Su, Wenbin
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 3(2015)
• Page Start: 990
• Page End: 995
• Publication Date: 2014-11-27
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13358
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : Domain structure of several poled (K0.50 Na0.50 )1− x Li x NbO3 ceramics (with chemical compositions of x = 0.03, 0.065, and 0.08, respectively) was investigated by means of observing the domain patterns with an acid‐etching technique. Among the three ceramics, the one with x = 0.03 is of orthorhombic phase and the other two are of tetragonal phase at room temperature. It was found that these ceramics possess distinctly different features of domain patterns and show a large difference in the time‐aging stability of piezoelectric properties. For the ceramic with x = 0.03, domain patterns consist of simply one single set or a few sets of parallel stripes inside the polycrystalline grains. In contrast, for those with x = 0.065 or 0.08, herringbone‐type patterns and a large number of watermarks are additionally observed. Furthermore, the ceramic with x = 0.03 was confirmed to have a much better time‐aging stability of piezoelectric properties than the other two. The results indicate that domain structure is more stable in orthorhombic phase than in tetragonal phase.