High piezoelectricity in CuO-modified Ba(Ti0.90Sn0.10)O3 lead-free ceramics with modulated phase structure |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, 100083 Beijing, China;2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, PR China;2. School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, PR China;1. Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA;2. Electronic Mater. Res. Lab, Key Lab Ministry of Education and International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an 710049, China;3. Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, USA;4. TRS Technologies Inc., 2820 E. College Ave., Suite J, State College, PA 16801, USA;5. Blatek Inc., 2820 E. College Ave., Suite F, State College, PA 16801, USA |
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| Abstract: | High piezoelectricity was achieved in Ba(Ti0.90Sn0.10)O3 lead-free ceramics by optimizing CuO addition and sintering temperature. The phase structure of 1.0 mol% CuO-doped Ba(Ti0.90Sn0.10)O3 ceramic is coexisting rhombohedral and tetragonal phases as sintered at 1300 °C. The coexistence of rhombohedral, tetragonal and orthorhombic phases appears in 1.0 mol% CuO-doped Ba(Ti0.90Sn0.10)O3 ceramics as sintered at 1350–1450 °C, which leads to highly enhanced d33 up to 650pC/N. This work demonstrates that high piezoelectric property (d33 = 650pC/N) can be obtained in BaTiO3-based lead-free piezoceramics with a simple composition modification by modulating phase structures, which also indicates that Ba(Ti,Sn)O3 is a promising candidate to replace the lead-based piezoceramics. |
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| Keywords: | Lead-free piezoceramics Phase structure Piezoelectric properties CuO |
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