High performance lead-free piezoelectric 0.96(K0.48Na0.52)NbO3-0.03[Bi0.5(Na0.7K0.2Li0.1)0.5]ZrO3-0.01(Bi0.5Na0.5)TiO3 single crystals grown by solid state crystal growth and their phase relations |
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| Affiliation: | 1. Toyota Central Research and Development Laboratories, Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan;2. Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan;1. Key Laboratory of Novel Thin-Film Solar Cells, Division of Solar Energy Materials and Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China;2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, PR China;3. The College of Mechanical and Electrical Technology, Wuxi Institute of Technology, Wuxi, Jiangshu 214121, PR China;1. Department of Physics, Indian Institute of Technology, Kharagpur 721302, India;2. Department of Physics, Jawaharlal Nehru Technological University, Kakinada 533003, India;3. Department of Physics, Institute of Technical Education and Research SOA University, Bhubaneswar 751030, India;1. Department of Physics, Bahauddin Zakariya University, Multan 60800, Pakistan;1. Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan;3. L. C. W. University, Lahore, Pakistan;1. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;2. Department of Materials Science and Engineering, University of Tabriz, Tabriz, Iran;3. Department of Mechanical Engineering, Quchan Branch, Islamic Azad University, Quchan, Iran;4. Department of Materials Engineering, Malayer University, Malayer, Iran;5. Department of Materials Science and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an, 710072, PR China;2. Science and Technology on Plasma Dynamics Lab, Air Force Engineering University, Xi''an, 710038, PR China |
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| Abstract: | 0.96(K0.48Na0.52)NbO3-0.03Bi0.5(Na0.7K0.2Li0.1)0.5]ZrO3-0.01(Bi0.5Na0.5)TiO3 single crystals were grown for the first time by the solid state crystal growth method, using 001] or 110]-oriented KTaO3 seed crystals. The grown single crystal shows a dielectric constant of 2720 and polarization-electric field loops of a lossy normal ferroelectric, with Pr = 45 μC/cm2 and Ec = 14.9 kV/cm, while the polycrystalline samples with a dielectric constant of 828 were too leaky for P-E measurement due to humidity effects. The single crystal has orthorhombic symmetry at room temperature. Dielectric permittivity peaks at 26 °C and 311 °C, respectively, are attributed to rhombohedral-orthorhombic and tetragonal–cubic phase transitions. Additionally, Raman scattering shows the presence of an orthorhombic-tetragonal phase transition at ～150 °C, which is not indicated in the permittivity curves but by the loss tangent anomalies. A transition around 700 °C in the high temperature dc conductivity is suggested to be a ferroelastic-paraelastic transition. |
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| Keywords: | Lead-free piezoelectric materials Potassium sodium niobate Single crystal growth Dielectric properties Phase transitions |
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