Bulletin of materials science | |
Diffuse phase transition, piezoelectric and optical study of Bi0.5Na0.5TiO3 ceramic | |
S K Rout1  B Parija3  V Senthil3  S Panigrahi3  T Badapanda2  | |
[1] Department of Applied Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, India$$Department of Applied Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, IndiaDepartment of Applied Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, India$$;Department of Physics, C V Raman College of Engineering, Bhubaneswar 752 054, India$$Department of Physics, C V Raman College of Engineering, Bhubaneswar 752 054, IndiaDepartment of Physics, C V Raman College of Engineering, Bhubaneswar 752 054, India$$;Department of Physics, National Institute of Technology, Rourkela 769 008, India$$Department of Physics, National Institute of Technology, Rourkela 769 008, IndiaDepartment of Physics, National Institute of Technology, Rourkela 769 008, India$$ | |
关键词: Dielectric; piezoelectric; diffuse phase transition; optical study.; | |
DOI : | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Bismuth sodium titanate, Bi0.5Na0.5TiO3 (BNT) is considered to be an excellent candidate for a key material of lead-free dielectric ceramics. In this study, we propose the dielectric and optical study of single phase BNT powder prepared by solid-state reaction route. The phase formation and structural study were done by X-ray diffraction (XRD) which shows well developed crystallite with a pure perovskite phase. The ceramic was sintered at different temperatures from 1050°C to 1175°C to study the effect of sintering temperature on the morphology and density. It was found that the sample sintered at 1150°C shows the highest density. The microstructure of the ceramic was investigated by scanning electron microscopic (SEM) technique. The temperature-dependent dielectric study of the sample sintered at 1150°C was done in the frequency range of 50 kHz�??1 MHz which shows a diffuse phase transition. The piezoelectric constant (�?33) was found to be 41 pCN-1. The P�?�E hysteresis loop confirms the ferroelectric behaviour in the ceramic. The UV�?�Vis spectrum indicated that the Bi0.5Na0.5TiO3 ceramic has an optical band gap of 2.94 eV.
【 授权许可】
Unknown
【 预 览 】
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