Pulse power energy conversion materials with ultrafast discharge processes and ultrahigh power densities have been widely used in the defense, energy, medical, and mining fields. The pressure‐driven depolarization in ferroelectric materials is significant and accounts for the discharge processes. In this study, we focus on pressure‐induced depolarization in (Pb_1‐1.5xLa_x)(Zr_0.80Ti_0.20)O₃ (PLZT) (x = 0‐0.07) ceramics, and their corresponding phase structure, dielectric properties, ferroelectric properties, and thermal depolarization performances. Although a satisfactory pulse power energy conversion performance has been achieved in Pb(Zr_0.95Ti_0.05)O₃ materials, poor temperature stability negatively influences their application. The static charge densities of PLZT (x = 0.04, 0.06) decreased from 29.11 μC/cm² and 31.53 μC/cm² to 19.76 μC/cm² and 6.56 μC/cm² under 400 MPa hydrostatic pressure, respectively, which is attributed to a pressure‐driven ferroelectric‐antiferroelectric phase structural transition. In particular, the temperature stability of PLZT (x = 0.06) materials is up to 87°C. This study may guide the further development pulse power energy conversion devices.

中文翻译：

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（Pb1-1.5xLax）（Zr0.80Ti0.20）O3铁电陶瓷的静水压力引起的去极化

具有超快放电过程和超高功率密度的脉冲功率能量转换材料已广泛用于国防，能源，医疗和采矿领域。铁电材料中压力驱动的去极化非常重要，并说明了放电过程。在这项研究中，我们重点研究（Pb _{1–1.5 x} La _x）（Zr _0.80 Ti _0.20）O ₃（PLZT）（x  = 0–0.07）陶瓷中的压力引起的去极化及其相应的相结构，介电性能，铁电性能和热去极化性能。尽管在Pb（Zr _0.95 Ti_0.05）O ₃材料，较差的温度稳定性会对它们的应用产生负面影响。在400 MPa静水压力下，PLZT的静电荷密度（x  = 0.04，0.06）从29.11μC/ cm ²和31.53μC/ cm ^2分别降至19.76μC/ cm ²和6.56μC/ cm ^2。压力驱动的铁电-反铁电相结构转变。特别是，PLZT（x  = 0.06）材料的温度稳定性高达87°C。该研究可指导进一步发展脉冲功率能量转换装置。