无机材料学报 ›› 2022, Vol. 37 ›› Issue (5): 520-526.DOI: 10.15541/jim20210297

所属专题: 【信息功能】电介质材料 【信息功能】透明陶瓷与光学晶体

• 研究论文 • 上一篇    下一篇

氧化镧掺杂铌酸钾钠陶瓷的电、光性能研究

肖舒琳1(), 戴中华1(), 李定妍1, 张凡博1, 杨利红1, 任晓兵2   

  1. 1. 西安工业大学 光电工程学院, 陕西省薄膜技术与光学检测重点实验室, 西安 710021
    2. 西安交通大学 前沿技术研究院, 西安 710049
  • 收稿日期:2021-05-11 修回日期:2021-07-09 出版日期:2022-05-20 网络出版日期:2021-08-20
  • 通讯作者: 戴中华, 教授. E-mail: zhdai@mail.xjtu.edu.cn
  • 作者简介:肖舒琳(1998-), 女, 硕士研究生. E-mail: 1319643700@qq.com
  • 基金资助:
    国家自然科学基金(51831006);国家自然科学基金(51431007);陕西省科技计划(2020GY-311);西安市智能兵器重点实验室基金(2019220514SYS020CG042)

Electrical and Optical Property of Lanthanum Oxide Doped Potassium Sodium Niobate Ceramics

XIAO Shulin1(), DAI Zhonghua1(), LI Dingyan1, ZHANG Fanbo1, YANG Lihong1, REN Xiaobing2   

  1. 1. Shaanxi Province Key Laboratory of Thin Films Technology & Optical Test, School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710032, China;
    2. Frontier Institute of Science and Technology, Xi'an Jiaotong University, X'ian 710049, China
  • Received:2021-05-11 Revised:2021-07-09 Published:2022-05-20 Online:2021-08-20
  • Contact: DAI Zhonghua, professor. E-mail: zhdai@mail.xjtu.edu.cn
  • About author:XIAO Shulin (1998-), female, Master candidate. E-mail: 1319643700@qq.com
  • Supported by:
    National Natural Science Foundation of China(51831006);National Natural Science Foundation of China(51431007);Science and Technology Project of Shaanxi Province(2020GY-311);Xi’an Key Laboratory of Intelligence(2019220514SYS020CG042)

摘要:

铌酸钾钠(K0.5Na0.5NbO3, KNN)基陶瓷具有充放电速度快、透明度高、应用温度范围宽、使用寿命长等优点, 在脉冲功率器件等领域具有广阔的应用前景。通过改性技术提高铌酸钾钠基陶瓷的电、光性能是该方向的研究热点。本研究采用固相法制备0.825(K0.5Na0.5)NbO3-0.175Sr1-3x/2Lax(Sc0.5Nb0.5)O3(x=0, 0.1, 0.2, 0.3)陶瓷(简称0.825KNN- 0.175SLSN), 研究La2O3掺杂对其相结构、微观形貌、光学、介电、铁电及储能性能的影响。研究结果表明: 0.825KNN- 0.175SLSN陶瓷具有高对称性的伪立方相结构; 随着La2O3掺杂量增大, 陶瓷的平均晶粒尺寸减小, 相变温度(Tm)及饱和极化强度(Pmax)增大, 达到峰值后下降。在x=0.3时, 该体系陶瓷表现出优异的透明性, 在可见光波长(780 nm)及近红外波长(1200 nm)范围内透过率分别达65.2%及71.5%, 同时实现了310 kV/cm的击穿场强和1.85 J/cm 3的可释放能量密度。

关键词: 铌酸钾钠, 无铅透明陶瓷, 透过率, 储能性能

Abstract:

Potassium sodium niobate (K0.5Na0.5NbO3, KNN) based ceramics can be widely used for pulsed power systems due to their fast charge-discharge rate, high transparency, wide range of working temperature, and long cycle life. Improving the electrical and optical property of KNN-based ceramics through modification is a research hotspot in this field. 0.825(K0.5Na0.5)NbO3-0.175Sr1-3x/2Lax(Sc0.5Nb0.5)O3 (x=0, 0.1, 0.2, 0.3) (0.825KNN- 0.175SLSN) ceramics were synthesized by solid state method. The effect of La2O3 doping on the phase structure, microstructure, optical property, dielectric property, ferroelectric property and energy storage property of the ceramic was studied. The results indicated that the structure of 0.825KNN-0.175SLSN ceramics is pseudo-cubic phase with high symmetry. With increment of La2O3 content, the average grain size of 0.825KNN-0.175SLSN ceramics decreased, and the phase transition temperature (Tm) and saturation polarization intensity (Pmax) increased and then decreased. 0.825KNN-0.175SLSN ceramics exhibit excellent transparency at x=0.3, the transmittance in the visible wavelength (780 nm) and near-infrared wavelength (1200 nm) ranges reaches 65.2% and 71.5%, respectively. The dielectric breakdown strength of 310 kV/cm and a recoverable energy density of 1.85 J/cm 3 are achieved at x=0.3.

Key words: potassium sodium niobate, lead-free transparent ceramics, transmittance, energy storage property

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