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http://dx.doi.org/10.3740/MRSK.2005.15.12.756

Effects of La2O3 on the Piezoelectric Properties of Lead-Free (Bi0.5Na0.5)0.94Ba0.06TiO3 Piezoelectric Ceramics  

Son Young-Jin (Department of Materials Science and Engineering/Research Center for Sustainable Eco-Devices and Materials (ReSEM), Chungju National University)
Yoon Man-Soon (Department of Materials Science and Engineering/Research Center for Sustainable Eco-Devices and Materials (ReSEM), Chungju National University)
Ur Soon-Chul (Department of Materials Science and Engineering/Research Center for Sustainable Eco-Devices and Materials (ReSEM), Chungju National University)
Publication Information
Korean Journal of Materials Research / v.15, no.12, 2005 , pp. 756-759 More about this Journal
Abstract
A lead free piezoelectric material, bismuth sodium barium titanate $(Bi_{0.5}Na_{0.5})_{0.94}Ba_{0.06}TiO_3$ (BNBT), was considered as an environment-friendly alternatives for the current PZT system. A perovskite BNBT was synthesized by conventional bulk ceramic processing technique. In order to improve piezoelectric properties, $La_2O_3$ as a dopant was incorporated into the BNBT system up to 0.025 moi, ana the effects on subsequent the piezoelectric ana dielectric properties were systematically investigated. With increasing $La_2O_3$ contents, the equilibrium grain shape was remarkably evidenced and sintered density was increased. Piezoelectric and dielectric properties were s]town to have maximum values at the $La_2O_3$ contents of 0.02 mol. $La^{3+}$ ions seemed to act as a softener in the BNBT system and to enhance dielectric and piezoelectric properties in this study.
Keywords
BNBT; Lead-free piezoelectric; doping;
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Times Cited By KSCI : 1  (Citation Analysis)
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