TY - JOUR
T1 - Relaxor behavior and energy storage performance of ferroelectric PLZT thin films with different Zr/Ti ratios
AU - Hu, Zhongqiang
AU - Ma, Beihai
AU - Liu, Shanshan
AU - Narayanan, Manoj
AU - Balachandran, Uthamalingam
PY - 2014/1
Y1 - 2014/1
N2 - Ferroelectric lead lanthanum zirconate titanate (PLZT) films with 8 mol% lanthanum and different Zr/Ti ratios (70/30, 65/35, 58/42, 52/48, 45/55, and 40/60) have been grown on platinized silicon substrates by chemical solution deposition. The effects of the Zr/Ti ratios on the dielectric and ferroelectric properties were investigated for high-power energy storage applications. These films exhibited relaxor behavior and slim polarization-electric field hysteresis loops, and the degree of phase transition diffuseness decreased with increasing Ti. The PLZT films with Zr/Ti=52/48 had a high spontaneous polarization of ≈51.2 μC/cm2, a low remanent polarization of ≈9.1 μC/cm2, and a low coercive electric field of ≈25.9 kV/cm, leading to a recoverable energy density of ≈30 J/cm3 and a charge-discharge efficiency of ≈78% at room temperature. The high energy density and high efficiency indicate that relaxor PLZT with La/Zr/Ti=8/52/48 is a promising candidate for high-power film capacitors.
AB - Ferroelectric lead lanthanum zirconate titanate (PLZT) films with 8 mol% lanthanum and different Zr/Ti ratios (70/30, 65/35, 58/42, 52/48, 45/55, and 40/60) have been grown on platinized silicon substrates by chemical solution deposition. The effects of the Zr/Ti ratios on the dielectric and ferroelectric properties were investigated for high-power energy storage applications. These films exhibited relaxor behavior and slim polarization-electric field hysteresis loops, and the degree of phase transition diffuseness decreased with increasing Ti. The PLZT films with Zr/Ti=52/48 had a high spontaneous polarization of ≈51.2 μC/cm2, a low remanent polarization of ≈9.1 μC/cm2, and a low coercive electric field of ≈25.9 kV/cm, leading to a recoverable energy density of ≈30 J/cm3 and a charge-discharge efficiency of ≈78% at room temperature. The high energy density and high efficiency indicate that relaxor PLZT with La/Zr/Ti=8/52/48 is a promising candidate for high-power film capacitors.
KW - A. Sol-gel processes
KW - C. Ferroelectric properties
KW - D. PLZT
KW - E. Capacitors
UR - https://www.scopus.com/pages/publications/84887622112
U2 - 10.1016/j.ceramint.2013.05.139
DO - 10.1016/j.ceramint.2013.05.139
M3 - 文章
AN - SCOPUS:84887622112
SN - 0272-8842
VL - 40
SP - 557
EP - 562
JO - Ceramics International
JF - Ceramics International
IS - 1 PART A
ER -