Low-temperature sintered Bi0.5Na0.5TiO3-SrTiO3 incipient piezoceramics and the co-fired multilayer piezoactuator thereof |
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| Affiliation: | 1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;2. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China;3. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Frontier Institute of Science and Technology, Xi''an Jiaotong University, Xi''an, 710049, China;2. State Key Laboratory for Mechanical Behavior of Materials, Xi''an Jiaotong University, Xi''an, 710049, China;3. MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi''an Jiaotong University, Xi''an, 710049, China;4. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an, 710072, China;5. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210, USA;6. Department of Materials Science and Engineering, Iowa State University, Ames, IA, 50011, USA;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;2. Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, No. 4800 Caoan Highway, Shanghai 201804, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China;2. School of Aeronautics and Astronautics, Central South University, Changsha, Hunan 410083, China;1. Department of Physics, Changwon National University, Changwon, Gyungnam 51140, Republic of Korea;2. School of Materials Science and Engineering, Changwon National University, Changwon, Gyungnam 51140, Republic of Korea;3. Department of Advanced Materials Engineering, Keimyung University, Dalseo-gu, Daegu 42601, Republic of Korea;4. Current address: Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan;1. School of Materials Science and Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan, Republic of Korea;2. Department of Physics, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan, Republic of Korea |
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| Abstract: | Lead-free Bi0.5Na0.5TiO3-SrTiO3 incipient piezoceramics with Li2CO3 and MnO2 additives were successfully fabricated at low firing temperature for applications in co-fired multilayer piezoactuators. The addition of Li2CO3 effectively shifted the sintering temperature from 1230 °C down to 1075 °C, where the ceramics were co-fired with a Ag/Pd (75/25) inner electrode. The prototype actuators were prepared by tape-casting method using ceramics with the composition of 0.74Bi0.5Na0.5TiO3-0.26 SrTiO3 + 0.15 wt%MnO2 + 0.45 wt%Li2CO3. The total number of active layers was 13, and each ceramic layer had a thickness of 60 μm. The actuator output a large strain up to ∼0.20% at a driving field of 4 kV/mm, due to the field-induced phase transition between the ergodic relaxor and ferroelectric phases. The excellent voltage-displacement performance of the prototype actuator demonstrates the potential for industrial applications. |
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| Keywords: | Lead-free piezoceramics Perovskite |
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