(Bi0.5Na0.5)0.94Ba0.06Ti1-x(Yb0.5Nb0.5)xO3无铅陶瓷的结构,储能、应变、介电及阻抗性能研究

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Abstract Lead-free (Bi_0.5Na_0.5)_0.94Ba_0.06Ti_1-x(Yb_0.5Nb_0.5)_xO₃ ceramics (x=0.01, 0.02, 0.03, 0.04, 0.05, 0.07) were prepared by solid phase method. The influences of (Yb_0.5Nb_0.5)⁴⁺doping amount on the phase structure, surface microstructure, ferroelectric, energy storage, strain and impedance properties were studied systematically. The results show that all (Yb_0.5Nb_0.5)⁴⁺complex ions dissolve into BNBT ceramic matrix and form perovskite structure. BNBT-xYN ceramics have compact structure, and the spheroid-like grains are obviously refined with the increase of (Yb_0.5Nb_0.5)⁴⁺ doping content. The phase transition from ferroelectrics to relaxation ferroelectrics is observed at x=0.02. Complex ions doping improves the energy storage density and energy storage efficiency of BNBT-xYN ceramics. When doping amount is 0.03, the energy storage density and energy storage efficiency reach 0.62 J/cm³ and 50.16% respectively at 70 kV/cm. At doping content of 0.02, BNBT-xYN ceramics illustrate large strain of up to 0.346%. (Yb_0.5Nb_0.5)⁴⁺ doping reduces the ferroelectric properties of BNBT-xYN ceramics and makes it transform into relaxed ferroelectric. The phase transition temperature drops below room temperature. The BNBT-xYN ceramics have good insulation.

Key words： BNBT ceramics (Yb_0.5Nb_0.5)⁴⁺ energy storage strain anti-ferroelectric

Published: 05 July 2019

CLC number:

TQ174.1

About author:: Yabing Sun, a postgraduate student at Guilin University of Electronic Technology. Graduated from Henan Normal University in 2017.Jiwen Xu obtained Ph.D from Shaanxi Normal University in 2014 and served in School of Material Science and Engineering, Guilin University of Electronic Technology till now. In 2015—2017, he was engaged in postdoctoral research in Guangdong Fenghua Advanced Technology (Holding) Co., Ltd. He is currently an associate professor and master supervisor. He has published more than 50 journal papers, applied 12 national invention patents and 9 of them were authorized. His team’s research interests are piezoelectric/ferroelectric cera-mics, oxide ceramic targets and nano energy harvesting. He has researched and completed more than 15 scientific research projects and won one provincial natural science award and one scientific and technological progress award.

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	SUN Yabing
	BAO Zhaoxian
	HUO Ziwei
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	ZHOU Changrong
	WANG Hua

Cite this article:

SUN Yabing,BAO Zhaoxian,HUO Ziwei, et al. Study on Structure, Energy Storage, Strain, Dielectric, Impedance Properties of (Bi_0.5Na_0.5)_0.94Ba_0.06Ti_1-x(Yb_0.5Nb_0.5)_xO₃ Ceramics[J]. Materials Reports, 2019, 33(z1): 171-177.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2019/V33/Iz1/171

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