SrSc0.5Nb0.5O3 改性BNT基无铅陶瓷的储能特性研究

doi:10.11901/1005.3093.2021.671

材料研究学报

2023, Vol. 37

Issue (3): 228-234 DOI: 10.11901/1005.3093.2021.671

研究论文

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SrSc_0.5Nb_0.5O₃ 改性BNT基无铅陶瓷的储能特性研究

朱明星¹, 戴中华²(

)

^1.铜陵职业技术学院机械工程系铜陵 244000
^2.西安工业大学光电工程学院西安 710021

Study on Energy Storage Properties of SrSC_0.5Nb_0.5O₃ Modified BNT-based Lead-free Ceramics

ZHU Mingxing¹, DAI Zhonghua²(

)

^1.Tongling Polytechnic Department of Mechanical Engineering, Tongling 244000, China
^2.School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710021, China

引用本文:

朱明星, 戴中华. SrSc_0.5Nb_0.5O₃ 改性BNT基无铅陶瓷的储能特性研究[J]. 材料研究学报, 2023, 37(3): 228-234.
Mingxing ZHU, Zhonghua DAI. Study on Energy Storage Properties of SrSC_0.5Nb_0.5O₃ Modified BNT-based Lead-free Ceramics[J]. Chinese Journal of Materials Research, 2023, 37(3): 228-234.

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摘要:

采用SrSc_0.5Nb_0.5O₃与(Bi_0.5Na_0.5)(Ti_0.95Al_0.025Nb_0.025)O₃固溶构建了无铅陶瓷体系材料(1-x)(Bi_0.5Na_0.5Ti_0.95Al_0.025-Nb_0.025O₃)-x(SrSc_0.5Nb_0.5O₃)(简记为(1-x)BNTA-xSSN，x=5%、10%、15%、20%，摩尔分数)。通过传统固相反应法制备陶瓷，研究了SrSc_0.5Nb_0.5O₃的引入对其结构、相变、储能和介电性能的影响。研究结果表明，(1-x)BNTA-xSSN样品为钙钛矿结构。其最大介电常数对应温度T_m随着SSN含量的增加而减小，相结构由四方相向伪立方相发生转变，陶瓷的铁电性减弱，弛豫性增强。当x=10%时，样品具有最大有效储能密度(W_rec)2.7 J/cm³；当x=15%时，样品具有最大储能效率(η)85%。

关键词 ：无机非金属材料, 相结构, 陶瓷, 弛豫铁电体, 储能密度

Abstract：

A new lead-free ceramic system (1-x)(Bi_0.5Na_0.5Ti_0.95Al_0.025Nb_0.025O₃)-x(SrSc_0.5Nb_0.5O₃) [(1-x)BNTA-xSSN, x=0.05、0.1、0.15、0.2] was prepared by solid-state method. The effects of the introduction of SrSc_0.5Nb_0.5O₃ on the structure, phase transformation, energy storage and dielectric properties were studied. The results showed that (1-x)BNTA-xSSN owns perovskite structure at room temperature. The T_mdecreases with the increase of SSN content, and the phase structure changes from tetragonal phase to pseudo-cubic phase. The ferroelectric properties of the ceramics were weakened and the relaxation ferroelectric properties were enhanced. When x=10%, the maximum effective energy storage density (W_rec) of BNTA-SSN ceramics is 2.7 J/cm³. The maximum energy storage efficiency (η) of BNTA-SSN ceramics is 85% at x=15%.

Key words： inorganic non-metallic materials phase structure ceramics relaxor ferroelectrics energy storage density

收稿日期: 2021-12-06

ZTFLH:

TQ174

基金资助:国家自然科学基金(51062014);陕西省重点研发计划(2023-YBGY-423);西安市智能重点实验室项目(2019220514SYS020CG042)

通讯作者: 戴中华，教授，zhdai@mail.xjtu.edu.cn，研究方向为电子材料与器件

Corresponding author: DAI Zhonghua, Tel: 18092679085, E-mail: zhdai@mail.xjtu.edu.cn

作者简介: 朱明星，男，1969年生，副教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.671 或 https://www.cjmr.org/CN/Y2023/V37/I3/228

图1 (1-x)BNTA-xSSN陶瓷XRD谱

图2 (1-x)BNTA-xSSN陶瓷电子显微镜照片

图3 (1-x)(BNTA)-xSSN陶瓷的介电常数-温度的关系

图4 (1-x)BNTA-xSSN陶瓷ln(1/ε-1/εm)与ln(T-Tc)的关系图以及弥散因子γ与SSN含量的关系

表1 (1-x)(BNTA)-xSSN陶瓷的Tm与Td值

图5 (a) 陶瓷材料的储能示意图; (b) (1-x)(BNTA)-xSSN陶瓷在10Hz下的P-E曲线; (c) 0.90(BNTA)-0.10SSN陶瓷在不同外加电场下的P-E曲线; (d)120kV/cm电场不同频率下的P-E曲线

图6 (1-x)(BNTA)-xSSN陶瓷的W与Wrec的关系、效率η与Wloss的关系、Pmax与Pr、△P的关系以及△P与场强的关系

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