An easy approach to obtain textured microstructure and transparent seed crystal prepared by simple molten salt synthesis in modified potassium sodium Niobate. Issue 4 (April 2020)

• Record Type: Journal Article
• Authors: Park, Seonhwa; Rahman, Attaur; Min, Yuho; Hwang, Geon-Tae; Choi, Jong-Jin; Hahn, Byung-Dong; Cho, Kyung-Hoon; Woo Lee, Jung; Nahm, Sahn; Ahn, Cheol-Woo
• Is Part Of: Journal of the European Ceramic Society. Volume 40:Issue 4(2020)
• Page Start: 1232
• Page End: 1235
• Publication Date: 2020-04
• Subjects: Seed crystal -- Pb-free ceramic -- Piezoelectric material -- Molten Salt synthesis -- Textured ceramic; 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.2019.11.007
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Microstructural engineering in conjunction with compositional design has been used for tailoring the properties of piezoelectric materials. In piezoelectric ceramics, the plate-like particles are used for the seed materials in order to realize the textured microstructures. In this study, the seed crystals are synthesized by simple molten salt synthesis (SMSS), using a generalized rule for driving the abnormal grain growth in (K, Na)NbO3 (KNN)-based ceramics. Furthermore, the textured ceramics are successfully produced in Ba-doped KNN materials, using the seed crystals which are grown by SMSS. Consequently, the textured ceramic shows the Lotgering factor of 92% and the piezoelectric constant (d33 ) which is similar to that of a single crystal. It is suggested that the excess donor ratio must be considered to obtain the seed crystals (synthesized by SMSS) and textured microstructures in KNN-based ceramics.