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Effect of Mn doping on sintering characteristics, microstructure and electrical properties of lead-free potassium sodium niobate ceramics

DONGLIANG CHU1,* , CHAO WANG1, MANKANG ZHU2, YUDONG HOU2

Affiliation

  1. Beijing Key Laboratory of Logistics System and Technology School of Logistics, Beijing Wuzi University , Tongzhou District )), Beijing 101149, P. R. China
  2. Key Laboratory of Advanced Functional Materials of China Education Ministry, Beijing University of Technology, Beijing 100124 , P. R. China

Abstract

The piezoelectric c eramics of (K 0.5 Na 0.5 )NbO 3 +xMnCO 3 (KNN+xMn) were prepared by the conventional solid state method, and the effect of Mn doping on the sintering characteristics, microstructure and electrical properties of the ceramics was investigated. The results show that proper Mn doping promotes sintering performance, induces lattice to change from orthorhombic to tetragonal and improves electrical properties of KNN ceramics. When the content of Mn is 2 mol%, the relative density of KNN ceramics is 93.2%, the phase struc ture is more close to tetragonal and the best electric properties are obtained, such as εr is 526, tanδ is 2.3%, d33 is 207 pC/N, k p is 45% and Qm is 181..

Keywords

Potassium sodium niobate, Mn doping, Sintering characteristics, Microstructure, Electrical properties.

Citation

DONGLIANG CHU, CHAO WANG, MANKANG ZHU, YUDONG HOU, Effect of Mn doping on sintering characteristics, microstructure and electrical properties of lead-free potassium sodium niobate ceramics, Optoelectronics and Advanced Materials - Rapid Communications, 14, 9-10, September-October 2020, pp.466-470 (2020).

Submitted at: May 19, 2020

Accepted at: Oct. 21, 2020