Comparative studies on structure, dielectric, strain and energy storage properties of (Bi0.5Na0.5)0.94Ba0.06Ti0.965(Mg1/3Nb2/3)0.035O3 lead-free ceramics prepared by traditional and two-step sintering method

Authors :: Xie, Hang
Zhao, Yangyang
Yang, Ling
Pang, Sijian
Yuan, Changlai
Wang, Hua
Zhou, Changrong
Xu, Jiwen
Source :: Journal of Materials Science: Materials in Electronics; Apr2018, Vol. 29 Issue 7, p5349-5355, 7p
Publication Year :: 2018
Abstract: This work compared the effects of sintering methods on the structure, dielectric, strain and energy storage properties of (Bi<subscript>0.5</subscript>Na<subscript>0.5</subscript>)<subscript>0.94</subscript>Ba<subscript>0.06</subscript>Ti<subscript>0.965</subscript>(Mg<subscript>1/3</subscript>Nb<subscript>2/3</subscript>)<subscript>0.035</subscript>O<subscript>3</subscript> (BNBT-0.035MN) lead-free ceramics. The single phase perovskite structure of BNBT-0.035MN ceramics was independent with sintering methods. The ceramics by two-step sintering had smaller grain size and denser microstructure than those of the ceramics by traditional sintering. Compared with traditional sintering, the ceramics by two-step sintering exhibited better energy storage properties. The optimum energy storage density (<italic>W</italic> = 0.80 J/cm<superscript>3</superscript>) and corresponding efficiency (<italic>η</italic> = 65%) were obtained at 70 kV/cm, while the electric field-induced strain decreased. Dielectric properties of two-step sintering samples were inferior to that of traditional samples, which is related to the grain size effect. [ABSTRACT FROM AUTHOR]

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