材料科学
实现(概率)
陶瓷
热稳定性
储能
能量密度
理论(学习稳定性)
热能储存
复合材料
功率(物理)
热的
工程物理
热力学
化学工程
计算机科学
数学
物理
统计
机器学习
工程类
作者
Bin He,Wuwei Feng,Meitang Liu,Jigong Hao,Hong Zheng,Yuqin Liu,Shuo Liu,Hu Cheng,He Qi
标识
DOI:10.1016/j.jeurceramsoc.2024.02.011
摘要
Herein, NaTaO3(NT) is introduced into 0.7Bi0.5Na0.5TiO3-0.3Sr0.7La0.2TiO3 (BNSLT) ceramic to increase the content of the highly stable P4bm phase, constructing a temperature-insensitive phase structure and permittivity over a wide temperature range (25–300 °C); thus, excellent thermal stability (Wrec = 4.68 ± 0.50 J/cm3, η = 89.0 ± 2.1%) over an ultra-wide temperature range (20–240 °C) is realized, superior to most lead-free ceramics. The co-substitution of heterovalent ions at both A and B sites in BNSLT leads to enhanced relaxor state and bandgap, delayed saturation polarization, reduced grain size and permittivity. Thereby, an excellent recoverable energy storage density (Wrec = 8.55 J/cm3), high efficiency (η = 89.5%), and extremely high power density (PD = 320 MW/cm3 at 280 kV/cm) are obtained in BNSLT-8%NT ceramics. This work offers a new paradigm for the development of ceramic capacitors with both excellent comprehensive energy storage performance and high-temperature working stability.
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