TY - JOUR
T1 - Enhanced energy-storage performance and dielectric temperature stability of (1-x)(0.65Bi0.5Na0.5TiO3-0.35Bi0.1Sr0.85TiO3)-xKNbO3 ceramics
AU - Hu, Bin
AU - Fan, Huiqing
AU - Ning, Li
AU - Gao, Shang
AU - Yao, Zhaojun
AU - Li, Qiang
N1 - Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2018/6/15
Y1 - 2018/6/15
N2 - Leed-free ferroelectric (1-x)(0.65Bi0.5Na0.5TiO3−0.35Bi0.1Sr0.85TiO3)-xKNbO3 (BNBST-xKN) ceramics were prepared by the conventional solid state sintering method. The dielectric, ferroelectric and energy-storage properties were systematically investigated. Temperature dependent permittivity curves showed the relaxation properties of BNBST ceramics enhanced with the increase of KNbO3. BNBST-15KN exhibited a high permittivity of 3484 and low dielectric loss of 0.003 at 150 °C. Furthermore, Δε/ε150 °C varied no more than 10% within the tmperature range of 30–297 °C, indicating an excellent dielectric temperature stability. The introduction of KNbO3 gave rise to a large Pm while P-E loops kept slim in shape. Therefore, the optimum energy-storage performance was realized in BNBST-15KN with an energy-storage density Wrec of 1.32 J/cm3 and energy-storage efficiency η of 82.5% at 95 kV/cm, accompanied with superior temperature stability and fatigue performance. The results demonstrated that BNBST-xKN system was a promising lead-free candidate for energy-storage applications.
AB - Leed-free ferroelectric (1-x)(0.65Bi0.5Na0.5TiO3−0.35Bi0.1Sr0.85TiO3)-xKNbO3 (BNBST-xKN) ceramics were prepared by the conventional solid state sintering method. The dielectric, ferroelectric and energy-storage properties were systematically investigated. Temperature dependent permittivity curves showed the relaxation properties of BNBST ceramics enhanced with the increase of KNbO3. BNBST-15KN exhibited a high permittivity of 3484 and low dielectric loss of 0.003 at 150 °C. Furthermore, Δε/ε150 °C varied no more than 10% within the tmperature range of 30–297 °C, indicating an excellent dielectric temperature stability. The introduction of KNbO3 gave rise to a large Pm while P-E loops kept slim in shape. Therefore, the optimum energy-storage performance was realized in BNBST-15KN with an energy-storage density Wrec of 1.32 J/cm3 and energy-storage efficiency η of 82.5% at 95 kV/cm, accompanied with superior temperature stability and fatigue performance. The results demonstrated that BNBST-xKN system was a promising lead-free candidate for energy-storage applications.
KW - C. Energy-storage density
KW - D. Bismuth sodium titanate
KW - E. Capacitors
KW - Temperature stability
UR - http://www.scopus.com/inward/record.url?scp=85044297380&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.03.176
DO - 10.1016/j.ceramint.2018.03.176
M3 - 文章
AN - SCOPUS:85044297380
SN - 0272-8842
VL - 44
SP - 10968
EP - 10974
JO - Ceramics International
JF - Ceramics International
IS - 9
ER -