(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

材料导报

2019, Vol. 33

Issue (z1): 171-177

无机非金属及其复合材料

(Bi_0.5Na_0.5)_0.94Ba_0.06Ti_1-x(Yb_0.5Nb_0.5)_xO₃无铅陶瓷的结构,储能、应变、介电及阻抗性能研究

孙亚兵¹, 包兆先¹, 霍子伟¹, 杨玲¹, 许积文^1,2, 周昌荣^1,2, 王华^1,2

1 桂林电子科技大学材料科学与工程学院,桂林 541004
2 桂林电子科技大学广西信息材料重点实验室,桂林 541004

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

SUN Yabing¹, BAO Zhaoxian¹, HUO Ziwei¹, YANG Ling¹, XU Jiwen^1,2, ZHOU Changrong^1,2, WANG Hua^1,2

1 School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004
2 Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004

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摘要采用固相法制备了(Bi_0.5Na_0.5)_0.94Ba_0.06Ti_1-x(Yb_0.5Nb_0.5)_xO₃(BNBT-xYN,x=0.01、0.02、0.03、0.04、0.05、0.07)无铅陶瓷,系统研究了(Yb_0.5Nb_0.5)⁴⁺掺杂量对陶瓷相结构,表面微观结构,铁电、储能、应变及阻抗性能的影响。研究结果表明:(Yb_0.5Nb_0.5)⁴⁺均固溶进入BNBT陶瓷基体中,形成单一的钙钛矿结构。BNBT-xYN陶瓷具有致密的结构,类球形的晶粒随着(Yb_0.5Nb_0.5)⁴⁺掺杂量增加而明显细化。陶瓷由铁电体向弛豫铁电体转变,当x=0.02时可观察到类反铁电体的双电滞回线。掺杂使得陶瓷的储能密度和储能效率均得到提高,当x=0.03时陶瓷的储能密度和储能效率在70 kV/cm下分别达到0.62 J/cm³、50.16%;当x=0.02时BNBT-xYN陶瓷伴随着大的应变,应变量最大可达0.346%。(Yb_0.5Nb_0.5)⁴⁺的掺杂降低了陶瓷的铁电性,使其向弛豫铁电体转变,转变温度降低到室温以下,同时陶瓷有很好的绝缘性。

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关键词: BNBT陶瓷 (Yb_0.5Nb_0.5)⁴⁺ 储能应变反铁电

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

出版日期: 2019-05-25 发布日期: 2019-07-05

ZTFLH:

TQ174.1

基金资助: 国家自然科学基金(11664006;61741105); 广西自然科学基金(2016GXNSFAA380069)

作者简介: 孙亚兵,桂林电子科技大学研究生。2017年毕业于河南师范大学。许积文,桂林电子科技大学副教授,硕士生导师。2014年毕业于陕西师范大学,2015—2017年在广东风华高新科技股份有限公司从事博士后研究。在国内外学术期刊发表论文50余篇,申请国家发明专利12项,其中授权9项。其团队主要研究方向包括:压铁电陶瓷、氧化物陶瓷靶材、纳米能量收集。在研及完成科研项目15余项,获得省级自然科学奖和科技进步奖各1项。csuxjw@126.com

引用本文:

孙亚兵, 包兆先, 霍子伟, 杨玲, 许积文, 周昌荣, 王华. (Bi_0.5Na_0.5)_0.94Ba_0.06Ti_1-x(Yb_0.5Nb_0.5)_xO₃无铅陶瓷的结构,储能、应变、介电及阻抗性能研究[J]. 材料导报, 2019, 33(z1): 171-177.
SUN Yabing, BAO Zhaoxian, HUO Ziwei, YANG Ling, XU Jiwen, ZHOU Changrong, WANG Hua. 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. Materials Reports, 2019, 33(z1): 171-177.

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