Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/52673
Title: Composition range and electrical properties of the morphotropic phase boundary in Bi<inf>0.5</inf>(Na<inf>0.80</inf>K<inf>0.20</inf>)<inf>0.5</inf>TiO<inf>3</inf>-(Ba<inf>0.7</inf>Sr<inf>0.3</inf>)TiO<inf>3</inf> system
Authors: Pharatree Jaita
Anucha Watcharapasorn
Sukanda Jiansirisomboon
Keywords: Materials Science
Issue Date: 1-Jul-2013
Abstract: The lead-free piezoelectric ceramic binary system of (1-x)Bi0.5(Na0.80K0.20)0.5TiO3-x(Ba0.7Sr0.3)TiO3 or (1-x) BNKT-xBST (with x ranging from 0.05 to 0.15 mol fraction) near the morphotropic phase boundary (MPB) has been investigated. The ceramics were synthesized by a conventional mixed-oxide method and sintered at 1125°C for 2 h. All BNKT-BST samples had relative density higher than 98% of their theoretical values. X-ray diffraction patterns showed that all compositions had a pure perovskite structure and BST effectively diffused into the BNKT lattice during sintering to form a solid solution. Crystal structure changed from rhombohedral-rich phase to tetragonal-rich phase with increasing BST content. Because of such MPB-like behavior, the highest dielectric (Tc = 325°C, e{open}r = 1827, tan δ = 0.0823) and piezoelectric performances (d33 = 225 pC/N) were obtained in the BNKT-0.11BST sample. © 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84880405631&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/52673
ISSN: 20936788
17388090
Appears in Collections:CMUL: Journal Articles

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