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http://dx.doi.org/10.3740/MRSK.2005.15.10.639

Dielectric and Piezoelectric Properties of Lead-free (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3 Ceramics  

Cho J. A. (School of Nano & Advanced Materials Engineering, Changwon National University)
Kuk M.-H. (School of Nano & Advanced Materials Engineering, Changwon National University)
Sung Y. S. (School of Nano & Advanced Materials Engineering, Changwon National University)
Lee S. H. (School of Nano & Advanced Materials Engineering, Changwon National University)
Song T. K. (School of Nano & Advanced Materials Engineering, Changwon National University)
Jeong S. J. (Korea Electrotechnology Research Institute, Electric and Magnetic Devices Research group)
Song J. S. (Korea Electrotechnology Research Institute, Electric and Magnetic Devices Research group)
Kim M.-H. (School of Nano & Advanced Materials Engineering, Changwon National University)
Publication Information
Korean Journal of Materials Research / v.15, no.10, 2005 , pp. 639-643 More about this Journal
Abstract
Lead-free $[Bi_{0.5}(Na_{1-x}K_x)_{0.5}TiO_3](x=0\~1.0)$ ceramics were prepared using a solid state reaction method and their structural and electrical characteristics were investigated. X-ray investigations indicated that the rhombohedral-tetragonal morphotropic phase boundary(MPB) of the $[Bi_{0.5}(Na_{1-x}K_x)TiO_3$ ceramics exists in the range of $x=0.16\~0.20$. The optimum values of piezoelectric constant$(d_{33})$, dielectric constant, and electromechanical coupling factor $(k_p)$ were obtained at $x=0.16\~0.20$ of the MPB region.
Keywords
Lead-free; morphotropic phase boundary;
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