Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31549
Title: The effects of CuO-doping on dielectric and piezoelectric properties of Bi0.5Na0.5TiO3-Ba(Zr,Ti)O3 lead-free ceramics
Authors: Tian, HY
Kwok, KW 
Chan, HLW 
Buckley, CE
Issue Date: 2007
Publisher: Springer
Source: Journal of materials science, 2007, v. 42, no. 23, p. 9750-9755 How to cite?
Journal: Journal of materials science 
Abstract: CuO-doped lead-free ceramics based on bismuth sodium titanate (Bi 0.5Na0.5TiO3, BNT) and barium zirconate titanate (Ba(Zr0.07Ti0.93)O3, BZT) were prepared via a multi-step solid-state reaction process. The BNT-BZT with CuO dopant ceramics sintered at 1150-1180 °C for 2 h in air showed a pure perovskite structure. SEM images reveal that a small amount of CuO (<2 mol%) play a significant role on the microstructure to improve its sintering attributes, while it will degrade when the dopant is added beyond 2 mol%. The dielectric and piezoelectric properties of CuO-doped BNT-BZT ceramics were evaluated. At room temperature, the sample doped with 2 mol% CuO shows quite good properties such as a high piezoelectric constant (d 33 ∼ 156.5 pC/N) and a high electromechanical coupling factor (k t ∼ 52%). The depolarization temperature increased dramatically and the maximum permittivity temperature decreased slightly.
URI: http://hdl.handle.net/10397/31549
ISSN: 0022-2461
EISSN: 1573-4803
DOI: 10.1007/s10853-007-2005-z
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