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Applied Physics A

, 125:608 | Cite as

Phase structure, Raman spectroscopic, microstructure and dielectric properties of (K0.5Na0.5)NbO3–Bi(Li0.5Nb0.5)O3 lead-free ceramics

  • Junpeng Shi
  • Yujing Yu
  • Xiuli ChenEmail author
  • Gaofeng Liu
  • Xinyu Jiang
  • Jinling Liang
  • Jiajie Ling
  • Mingzhao Xu
  • Huanfu Zhou
Article
  • 111 Downloads

Abstract

(1-x)(K0.5Na0.5)NbO3xBi(Li0.5Nb0.5)O3 [(1-x)KNN–xBLN, 0 ≤ x ≤ 0.02] dielectric ceramics were synthesized by an ordinary sintering technique. The effects of Bi(Li0.5Nb0.5)O3 addition on the phase structure, microstructure and dielectric properties of KNN ceramics were studied. The phase structure of ceramics shifted from the orthorhombic to pseudo-cubic phase structure with increasing the content of Bi(Li0.5Nb0.5)O3. The addition of Bi(Li0.5Nb0.5)O3 depressed the transition temperature of the orthogonal and tetragonal phases, which is a benefit to the thermal stability of KNN ceramics. Especially, as x = 0.01, the ceramics have a high relative permittivity εr (~ 1557), low dielectric loss tanδ (< 2.4%) and good thermal stability Δε/ε150°C (≤  ± 10%) from 150 °C to 365 °C. Especially, when x = 0.005, the piezoelectric constant d33 was improved to 133 pC/N. Furthermore, the comprehensive properties of (1-x)KNN–xBLN (0 ≤ x ≤ 0.02) ceramics were enhanced significantly to those of pure KNN ceramics. These results indicate that these ceramics could be considered as the prominent promising candidates for high-temperature capacitor application.

Notes

Acknowledgements

This work was supported by the Natural Science Foundation of China (Nos. 11664008 and 61761015), Natural Science Foundation of Guangxi (Nos. 2018GXNSFFA050001, 2017GXNSFDA198027, and 2017GXNSFFA198011).

Supplementary material

339_2019_2860_MOESM1_ESM.doc (25 kb)
Supplementary file1 (DOC 25 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Junpeng Shi
    • 1
  • Yujing Yu
    • 1
  • Xiuli Chen
    • 1
    Email author
  • Gaofeng Liu
    • 1
  • Xinyu Jiang
    • 1
  • Jinling Liang
    • 1
  • Jiajie Ling
    • 1
  • Mingzhao Xu
    • 1
  • Huanfu Zhou
    • 1
  1. 1.Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and EngineeringGuilin University of TechnologyGuilinChina

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