Effect of sintering temperature on the dielectric, ferroelectric and energy storage properties of SnO2-doped Bi0.5(Na0.8K0.2)0.5TiO3 lead-free ceramics

Journal of Advanced Dielectrics

Nguyen Truong-Tho¹  Le Dai Vuong² 

[1] Department of Physics, College of Sciences, Hue University, Hue City, Vietnam;Faculty of Natural Sciences, Thu Dau Mot University, Binh Duong Province, Vietnam;

关键词: lead-free ceramics;    bnkt;    sintering temperature;    dielectric constant;   

DOI  :  10.1142/S2010135X20500113

来源: DOAJ

【 摘 要 】

Sintered lead-free Bi0.5(Na0.8K0.2)0.5(Ti0.96Sn0.04)O3 ceramics (BNKTS) have been fabricated via a solid-state reaction. The effect of sintering temperature on the structural, morphological, dielectric, ferroelectric and energy storage properties of BNKTS ceramics was investigated, and it was found that the electrical properties of the synthesized ceramics increased with the increase in the sintering temperature, and the highest values were achieved at 1100∘C. The ceramics sintered at the optimized temperature of 1100∘C exhibited the best physical, dielectric, ferroelectric and energy storage properties, namely, high density (the relative density, ρ=5.88g.cm−3, approximate to 96.7% of the theoretical value), high densification factor (DF=0.93), high dielectric constant (εr=1215), low dielectric loss (tanδ=0.051), highest dielectric constant (εmax=4335), high remanent polarization (Pr=9.5μC.cm−2), high coercive field (Ec=14.3kV/cm), high energy storage density (0.12J/cm3), and high energy storage efficiency (41.7% at 46.3kV/cm).

【 授权许可】

Unknown