Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/60393
Title: Morphotropic phase boundary of lead-free piezoelectric ceramics from BNT-KN system
Authors: N. Pisitpipathsin
W. Koontasing
S. Eitssayeam
U. Intatha
G. Rujijanagul
K. Pengpat
T. Tunkasiri
Keywords: Engineering
Issue Date: 1-Dec-2008
Abstract: In this research work, the investigation of the morphotropic phase boundary, physical properties and electrical properties of lead- free piezoelectric materials of bismuth sodium titanium oxide: (Bi 0.5Na0.5TiO3 (BNT) and potassium niobium oxide : KNbO3 (KN) in the ceramic system of (l-x)BNT- XKN where X= 0.00, 0.03, 0.05, 0.08, 0.10 and 0.15 by modified mixed oxide method was carried out. The BNT and KN powders were prepared separately using calcination technique with optimum calcination temperature for producing both BNT and KN powders of about 800°C. XRD results revealed that the BNT-KN ceramics with low KN content of X less than 0.05 contain ferroelectric perovskite phase with rhombohedral symmetries while the higher KN content ceramics have mixed symmetries between rhombohedral and orthorhombic. From the evidences including phases, microstructures and dielectric data of the BNT-KN ceramics, it may be assumed that the morphotropic phase boundary may be at around the composition of X = 0.05. © 2008 Trans Tech Publications, Switzerland.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=62949198764&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/60393
ISSN: 10226680
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.


Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.