新型BT-BMT-xBNT无铅高储能密度陶瓷研究

人工晶体学报 ›› 2022, Vol. 51 ›› Issue (11): 1967-1972.

新型BT-BMT-xBNT无铅高储能密度陶瓷研究

雷磊^1,2, 吴健³, 董子晗⁴, 卢林⁵, 李旭³, 王良^1,2, 万昊^1,2

1.国网陕西省电力有限公司电力科学研究院,西安 710100;
2.国网(西安)环保技术中心有限公司,西安 710100;
3.国网陕西省电力有限公司,西安 710048;
4.国网陕西省电力有限公司渭南供电公司,渭南 714000;
5.国家电网有限公司,北京 100031

收稿日期:2022-06-22 出版日期:2022-11-15 发布日期:2022-12-07
作者简介:雷磊(1985—),男,陕西省人,高级工程师。 E-mail:leil0614@163.com
基金资助:
国家电网公司总部科技项目(5226SX20007C)

Novel BT-BMT-xBNT Lead-Free Ceramics with High Energy Storage Density

LEI Lei^1,2, WU Jian³, DONG Zihan⁴, LU Lin⁵, LI Xu³, WANG Liang^1,2, WAN Hao^1,2

1. Electric Power Research Institute of State Grid Shaanxi Electric Power Co., Ltd., Xi’an 710100, China;
2. State Grid (Xi’an) Environmental Protection Technology Center Co., Ltd., Xi’an 710100, China;
3. State Grid Shaanxi Electric Power Co., Ltd., Xi’an 710048, China;
4. Weinan Power Supply Company of State Grid Shaanxi Electric Power Co., Ltd., Weinan 714000, China;
5. State Grid Corporation of China, Beijing 100031, China

Received:2022-06-22 Online:2022-11-15 Published:2022-12-07

摘要/Abstract

摘要： 本文采用传统固相反应法,成功制备了新型无铅弛豫铁电陶瓷(1-x)[0.9BaTiO₃-0.1Bi(Mg_0.25Ta_0.5)O₃]-xBi_0.5Na_0.5TiO₃。结果表明,较高居里温度的Bi_0.5Na_0.5TiO₃的引入,使得材料体系中建立了更多的以Bi—O耦合为主的极性纳米区域,弥补了因Bi(Mg_0.25Ta_0.5)O₃的加入导致的宏观极化强度的减少,提高了材料的饱和极化强度,实现了较高储能密度的同时具有更好的温度稳定性。在245 kV/cm电场强度下,x=0.2样品的储能密度约为4.01 J/cm³,储能效率约为84.86%,同时该组分在20~170 ℃储能密度的变化率小于5%,储能效率的变化率小于6%,表现出优异的温度稳定性。

关键词: 无铅, 弛豫铁电体, 能量存储, BaTiO₃基陶瓷, 储能效率, 温度稳定性

Abstract: In this work, novel lead-free relaxor ferroelectric (1-x)[0.9BaTiO₃-0.1Bi(Mg_0.25Ta_0.5)O₃]-xBi_0.5Na_0.5TiO₃ceramics were synthesized via composite strategy using the traditional solid-state process. Results indicate that the incorporation of Bi_0.5Na_0.5TiO₃ with a high Curie temperature could not only significantly enhance the energy storage density, but also improve the temperature stability. As BNT concentration rose, the nano-scale polarization mismatch dominated by Bi—O coupling was established and enhanced, significantly compensating for the reduction of macroscopic polarization due to the addition of Bi(Mg_0.25Ta_0.5)O₃, leading to elevate saturation polarization and improve temperature stability. The ceramics which x is 0.2 show optimal energy storage features with a high energy storage density of 4.01 J/cm³ in the electric field of 245 kV/cm combined with a relatively high energy storage efficiency of 84.86%. Moreover, excellent temperature stabilities were noticed with the change rate of energy storage density is less than 5% and energy storage efficiency is less than 6% over a broad temperature range (20~170 ℃).

Key words: lead free, relaxor ferroelectric, energy storage, BaTiO₃ based ceramics, energy storage efficiency, temperature stability

中图分类号:

TQ174

雷磊, 吴健, 董子晗, 卢林, 李旭, 王良, 万昊. 新型BT-BMT-xBNT无铅高储能密度陶瓷研究[J]. 人工晶体学报, 2022, 51(11): 1967-1972.

LEI Lei, WU Jian, DONG Zihan, LU Lin, LI Xu, WANG Liang, WAN Hao. Novel BT-BMT-xBNT Lead-Free Ceramics with High Energy Storage Density[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(11): 1967-1972.

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