Effects of the Sintering Process on the Microstructure and Electrical Properties of 0.95(K0.5Na0.5)NbO_3-0.05Ba(Zr0.05Ti0.95)O_3 Lead-free Ceramics
Author of the article:XU Xin;Li Chenwei;LYU Zhenlin
Author's Workplace：School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China
Key Words：piezoelectric ceramics potassium sodium niobate zirconate barium titanate two-step sintering
Abstract：
The 0.95(K0.5Na0.5)NbO3-0.05Ba(Zr0.05Ti0.95)O3 lead-free piezoelectric ceramics were prepared by two-step sintering method.The influence of sintering process on microstructure and electrical properties of ceramics was studied.The results show that 0.95 KNN-0.05 BZT could be prepared by two-step sintering method in a wide temperature range.In addition,increasing the sintering temperature in the first step and prolonging the holding time in the second step can improve the density,piezoelectric and dielectric properties of 0.95 KNN-0.05 BZT ceramics.Optimum process parameters for 1 190℃/10 min/1 050℃/15 h,its performance for the d33=136.7 pC/N,kp=50%,εr=1698 and tanδ=0.023,respectively.
