Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33928
Title: Microstructure, piezoelectric and ferroelectric properties of Mn-added Na0.5Bi4.5Ti4O15 ceramics
Authors: Gao, D
Kwok, KW 
Lin, D
Keywords: Pizoelectricity
Ferroelectricity
Bismuth layer-structured
Issue Date: 2011
Publisher: Elsevier
Source: Current applied physics, 2011, v. 11, no. 3, p. s124-s127 How to cite?
Journal: Current applied physics 
Abstract: Lead-free piezoelectric ceramics Na0.5Bi4.5Ti4O15 + x wt% MnCO3 have been prepared by a conventional sintering technique, and their structure, piezoelectric and ferroelectric properties have been studied. Our results show that MnCO3 is effective in promoting the grain growth and densification of the ceramics. After the addition of MnCO3, the remanent polarization P-r, piezoelectric coefficient d(33), electromechanical coupling coefficient k(p) and mechanical quality factor Q(m) of the ceramics are increased, whilst the loss tangent tan delta is decreased. For the ceramic added with 0.375 wt% MnCO3, the dielectric and piezoelectric properties become optimum: d(33) = 28 pC/N, k(p) = 0.06, Q(m) = 3290, epsilon(r) = 140 and tan delta = 0.3%. Our results also demonstrate that the ceramic exhibits a good thermal stability up to around 500 degrees C.
Description: Joint International Conference of 7th Asian Meeting on Ferroelectricity (AMF)/7th Asian Meeting on Electroceramics (AMEC), Jeju, South Korea, 28 June-1 July 2010
URI: http://hdl.handle.net/10397/33928
ISSN: 1567-1739
DOI: 10.1016/j.cap.2011.03.015
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