Relaxor ferroelectric 0.9BaTiO3–0.1Bi(Zn0.5Zr0.5)O3 ceramic capacitors with high energy density and temperature stable energy storage properties
Relaxor ferroelectric 0.9BaTiO3–0.1Bi(Zn0.5Zr0.5)O3 ceramic capacitors with high energy density and temperature stable energy storage properties
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DOI：
10.1039/c7tc02478a
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发表时间：
2017-09
影响因子：
6.4
通讯作者：
Q. Yuan;Fang-Zhou Yao;Yifei Wang;Rong Ma;Hong Wang
中科院分区：
文献类型：
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作者：
Q. Yuan;Fang-Zhou Yao;Yifei Wang;Rong Ma;Hong Wang
采用传统固相法制备了0.9BaTiO3-0.1Bi（Zn0.5Zr0.5）O3（0.9BT-0.1BZZ）基弛豫型高储能铁电陶瓷。烧结样品具有钙钛矿结构，具有假立方相，显示出中等介电常数（500-2000）、低介电损耗（tan δ < 0.15）和高度扩散和分散的弛豫样行为。当偏置电场从0 kV cm−1增加到40 kV cm−1时，弱介电非线性表现出约10%的介电常数变化。在30-150 °C的测量温度范围内，观察到伴随击穿强度从266.5 kV cm-1缓慢下降到217.7 kV cm-1的极细极化电场环。在264 kV cm−1的电场下获得的最大能量密度为2.46 J cm−3，接近环境温度下的击穿强度。BT-BZZ陶瓷在很宽的温度范围内具有能量密度和能量效率的温度稳定性，这使得BT-BZZ陶瓷在大功率电力应用中具有良好的应用前景。
A relaxor ferroelectric ceramic for high energy storage applications based on 0.9BaTiO3–0.1Bi(Zn0.5Zr0.5)O3 (0.9BT–0.1BZZ) was successfully fabricated via a conventional solid-state method. The sintered samples have a perovskite structure with a pseudocubic phase, showing a moderate dielectric constant (500–2000), low dielectric loss (tan δ < 0.15) and highly diffusive and dispersive relaxor-like behavior. The weak dielectric nonlinearity exhibits a dielectric constant change of ∼10% as the bias electric field increases from 0 kV cm−1 to 40 kV cm−1. Extra slim polarization–electric field loops accompanying the slow decrease of breakdown strength from 266.5 kV cm−1 to 217.7 kV cm−1 are observed in a measured temperature range of 30–150 °C. A maximum energy density of 2.46 J cm−3 was obtained at the electric field of 264 kV cm−1 close to the breakdown strength at ambient temperature. Temperature stability of both energy density and energy efficiency exists in a wide temperature range, which makes BT–BZZ ceramics promising candidates for high power electric applications.