High recoverable energy storage density and large piezoelectric response in (Bi0.5Na0.5)TiO3-PbTiO3 thin films prepared by a sol-gel method |
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| Affiliation: | 1. Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;2. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China;1. Inner Mongolia Key Laboratory of Ferroelectric-related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. Key Laboratory of Instrumentation and Dynamic Measurement of Ministry of Education, School of Instrument and Electronics, North University of China, Taiyuan, Shanxi 030051, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. National Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, PR China;1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. College of Physics and Technology, Inner Mongolia University, Hohhot 010020, China;1. Inner Mongolia Key Laboratory of Ferroelectric-related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. Key Laboratory of Instrumentation and Dynamic Measurement of Ministry of Education, School of Instrument and Electronics, North University of China, Taiyuan, Shanxi 030051, China |
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| Abstract: | Low-lead-content (1-x)(Bi0.5Na0.5)TiO3-xPbTiO3 (x = 0, 0.05, 0.10, 0.15, 0.25) (hereafter abbreviated as BNT-xPT) thin films were prepared by a sol-gel method, and their crystal structure, dielectric properties, recoverable energy-storage density and piezoelectric response were investigated as a function of PT concentration. Combining the XRD patterns and Raman spectroscopy indicate the phase structures go through rhombohedral (R) – rhombohedral + tetragonal (R + T) – tetragonal (T) evolution with increasing of PT content. A high recoverable energy storage density of 13.02 ± 0.39 J/cm3 was achieved in the BNT-0.10PT thin films due to the high field endurance and significantly enhanced polarizability. Moreover, a superior piezoelectric response (d33* = 120 ± 5 pm/V) was also obtained in the 10% PT-modified BNT films, which can be attributed to easy polarization rotation due to low polarization anisotropy on the R-T phase boundary. These properties indicate that BNT-0.10PT films might be promising multifunctional materials for piezoelectric micro-actuator and energy storage embedded capacitor applications. |
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| Keywords: | BNT-PT thin films Sol-gel Energy-storage density Piezoelectric response |
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