Optimized electrical properties of (Bi1/2K1/2)TiO3- bi(Mn2/3Sb1/3)O3 lead-free ceramics in mixing phase region
A new lead-free (1-x)(Bi1/2K1/2)TiO3-xBi(Mn2/3Sb1/3)O3 (BKT-BMS) piezoelectric ceramics were prepared by conventional solid-state route. The experiments show that the addition of BMS induces the occurrence of a mixed tetragonal and pseudocubic phases, and the fraction of tetragonal to pseudocubic phases closes to 50:50 around the composition x = 0.015, at where the dielectric, ferroelectric and piezoelectric properties is optimized. It is highlighted that the Td for the composition x = 0.015 keeps at an adequately-high level around 205 °C. All these competitive properties of the composition x = 0.015 demonstrate the potential application for lead-free piezoelectric ceramics over a broad temperature range.
KeywordsPiezoelectric ceramic Ferroelectric and piezoelectric properties Phase structure
This work was supported by the National Natural Science Foundation of China (Grant No. 51602012, 51677001), the Natural Science Foundation of Beijing (Grant No. 4164078), Ri-Xin Talents Project of Beijing University of Technology (Grant No. 2017-RX(1)-15), Jing-Hua Talents Project of Beijing University of Technology (Grant No. 2015-JH-L04) and Beijing Municipal High Level Innovative Team Building Program (No. IDHT20170502).
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