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Phase Structure, Raman Spectra, Microstructure, and Dielectric Properties of (K0.5 Na0.5)NbO3-Bi(Li1/3Zr2/3)O3 Solid Solutions

  • Hailin Zhang
  • Xu Li
  • Xiuli ChenEmail author
  • Huanfu Zhou
  • Xiaoxia Li
  • Xiao Yan
  • Gaofeng Liu
  • Jie Sun
Article
  • 5 Downloads

Abstract

In this study, (1 − x)(K0.5Na0.5)NbO3-xBi(Li1/3Zr2/3)O3 (KNN-BLZ, x = 0, 0.005, 0.01, 0.015, or 0.02) lead-free ceramics were fabricated. The effects of the addition of Bi(Li1/3Zr2/3)O3 on the dielectric properties, microstructure, and phase structure of the KNN ceramics were studied. The structures of KNN ceramics shifted from an orthorhombic to tetragonal phase structure with the addition of Bi(Li1/3Zr2/3)O3. Furthermore, at x = 0.005, the ceramics exhibited good thermal stability (Δε/ε150°C ≤ ± 10%), low dielectric loss (tanΔ < 2.5%), and large relative permittivity (ε ~ 2160) in the temperature range of 154–370°C. Additionally, the electrical properties of the ceramic at high temperatures showed that the basic mechanism of the conduction and relaxation processes was thermal activation, and oxygen vacancies may be one of the mobile charge carriers.

Keywords

Raman spectroscopy dielectric properties thermal stability 

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Notes

Acknowledgments

This work was supported by the Natural Science Foundation of China (Nos. 11664008 and 11364012), Natural Science Foundation of Guangxi (Nos. 2017GXNSFDA198027 and 2017GXNSFFA198011).

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Hailin Zhang
    • 1
  • Xu Li
    • 1
  • Xiuli Chen
    • 1
    Email author
  • Huanfu Zhou
    • 1
  • Xiaoxia Li
    • 1
  • Xiao Yan
    • 1
  • Gaofeng Liu
    • 1
  • Jie Sun
    • 1
  1. 1.Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, School of Materials Science and EngineeringGuilin University of TechnologyGuilinChina

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