Effect of BBS-Based Frit on the Low Temperature Sintering and Electrical Properties of KNN Lead-Free Piezoceramics

Authors

  • Yue-Ming Li,

    Corresponding author
    • School of Materials Science and Engineering, Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen Ceramic Institute, Jingdezhen, People's Republic of China
    Search for more papers by this author
  • Zong-Yang Shen,

    1. School of Materials Science and Engineering, Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen Ceramic Institute, Jingdezhen, People's Republic of China
    Search for more papers by this author
  • Run-Run Li,

    1. School of Materials Science and Engineering, Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen Ceramic Institute, Jingdezhen, People's Republic of China
    Search for more papers by this author
  • Zhu-Mei Wang,

    1. School of Materials Science and Engineering, Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen Ceramic Institute, Jingdezhen, People's Republic of China
    Search for more papers by this author
  • Yan Hong,

    1. School of Materials Science and Engineering, Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen Ceramic Institute, Jingdezhen, People's Republic of China
    Search for more papers by this author
  • Run-Hua Liao

    1. School of Materials Science and Engineering, Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen Ceramic Institute, Jingdezhen, People's Republic of China
    Search for more papers by this author

lym6329@yahoo.com.cn

Abstract

Using BaOB2O3SiO2 (BBS)-based frit as sintering aid, the K0.49Na0.51NbO3 (KNN) + x wt% BBS (= 1.0, 1.5, 2.0 and 2.5) lead-free piezoelectric ceramics were successfully fabricated by solid-state reaction method under low-sintering temperature of 1000°C. The effect of BBS frit doping amount on the structure and electrical properties of the ceramics was investigated. The KNN ceramics with 1.5 wt% BBS frit showed optimal properties as follows: piezoelectric constant d33 = 108 pC/N, planar electromechanical coupling coefficient kp = 41%, mechanical quality factor Qm = 225, relative dielectric constant εr = 410, dielectric loss tanδ = 0.57% and Curie temperature Tc = 400°C. This ceramic sample should be a good lead-free candidate for actuators or high temperature sensors application due to its ultra-low tanδ, relatively high Qm and Tc.

Ancillary