Increased Energy-Storage Density and Superior Electric Field and Thermally Stable Energy Efficiency of Aerosol-Deposited
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Increased Energy-Storage Density and Superior Electric Field and Thermally Stable Energy Efficiency of Aerosol-Deposited Relaxor (Pb0.89La0.11)(Zr0.70Ti0.30)O3 Films Ajeet Kumar1 • So Hyeon Kim1 • Atul Thakre1 • Geon Lee1 • Yeon Gyeong Chae1 Jungho Ryu1,2
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Submitted: 9 April 2020 / in revised form: 14 September 2020 / Accepted: 14 September 2020 ASM International 2020
Abstract (Pb0.89La0.11)(Zr0.70Ti0.30)O3 (PLZT 11/70/30) relaxor ferroelectric (RFE) films were fabricated on Pt/Si substrates by aerosol deposition, which not only enabled the deposition of a film at room temperature but also increased the dielectric breakdown strength. Perovskite phase and microstructural analyses were carried out by x-ray diffraction and scanning electron microscopy techniques. A PLZT 11/70/30 RFE AD film annealed at 550 C exhibited the best dielectric properties (er * 1090, tand * 0.028) and typical relaxor-type slim polarization– electric field (P–E) hysteresis loop with relatively low remanent polarization (Pr * 6.81 lC/cm2) and coercive field (Ec * 118 kV/cm) even at a high applied electric field (* 2500 kV/cm). These superior properties were achieved due to high phase purity, low defect densities, and well-tuned grain sizes of an annealed PLZT 11/70/30 RFE AD film. The PLZT 11/70/30 RFE AD film exhibited a high energy-storage density (Wrec * 44 J/cm3) which is attributed to the high dielectric breakdown strength, low hysteresis loss (Wloss * 10.3 J/cm3), and almost-electricfield-independent efficiency (g * 81%, change of * 6% This article is part of a special topical focus in the Journal of Thermal Spray Technology on Aerosol Deposition and Kinetic Spray Processes. This issue was organized by Dr. Kentaro Shinoda, National Institute of Advanced Industrial Science and Technology (AIST); Dr. Frank Gaertner, Helmut-Schmidt University; Prof. Changhee Lee, Hanyang University; Prof. Ali Dolatabadi, Concordia University; and Dr. Scooter Johnson, Naval Research Laboratory. & Jungho Ryu [email protected] 1
School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, South Korea
2
Institute of Materials Technology, Yeungnam University, Gyeongsan 38541, South Korea
with the change from low to high electric fields), calculated using the unipolar P–E hysteresis loop. The excellent temperature stability of the energy efficiency of the PLZT 11/70/30 RFE AD film makes it a promising material for high-temperature energy-storage capacitor applications. Keywords (Pb0.89La0.11)(Zr0.70Ti0.30)O3 aerosol deposition capacitor energy-storage relaxor ferroelectric List of er tand Pr Ec Wrec Wloss g P E C V I Pmax Tc Tm Ps
Symbols Dielectric constant Loss Remanent polarization (lC/cm2) Coercive field (kV/cm) Energy-storage density (J/cm3) Hysteresis loss (J/cm3) Efficiency Polarization (lC/cm2) Electric field (kV/cm) Capacitance (F) Voltage (V) Current (A) Maximum polarization (lC/cm2) Transition temperature (C) Dielectric maximum temperature (C) Net polarization (lC/cm2)
Introduction Materials hav
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