Temperature-stable dielectric and energy storage properties of (0.94Bi0.47Na0.47Ba0.06TiO3-0.06BiAlO3)–NaNbO3 ceramics
Temperature-stable dielectric and energy storage properties of (0.94Bi0.47Na0.47Ba0.06TiO3-0.06BiAlO3)–NaNbO3 ceramics
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DOI：
10.1016/j.jallcom.2020.156409
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发表时间：
2020-12
影响因子：
6.2
通讯作者：
Li‐na Liu;Xiao‐ming Chen;H. Lian;Xing Wang;Jiangbo Lu;X. Liu;Jian‐Ping Zhou;Peng Liu
中科院分区：
文献类型：
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作者：
Li‐na Liu;Xiao‐ming Chen;H. Lian;Xing Wang;Jiangbo Lu;X. Liu;Jian‐Ping Zhou;Peng Liu
采用传统固相烧结法制备了（1-x）（0.94Bi0.47Na0.47Ba0.06TiO3-0.06BiAlO3）-xNaNbO 3无铅陶瓷。所有陶瓷都具有纯钙钛矿结构，平均晶粒尺寸约为1 μm。研究了它们的介电和储能行为。与未掺杂的陶瓷相比，NaNbO 3掺杂的陶瓷显示出显著降低的电容温度系数（TCC）。x = 0.02的样品在67 °C ~ 380 °C范围内具有较高的介电常数和优异的温度稳定性，满足TCC ≤ ± 15%的要求。当x = 0.03时，储能密度提高到1.71 J/cm ~ 3，在0.5 Hz ~ 100 Hz范围内具有良好的频率稳定性，在25 °C ~ 130 °C范围内具有良好的温度稳定性，在105次疲劳循环内具有良好的抗疲劳性能。
The lead-free ceramics (1-x)(0.94Bi0.47Na0.47Ba0.06TiO3-0.06BiAlO3)-xNaNbO3 were prepared by means of a traditional solid-state sintering method. All ceramics have pure perovskite structure and average grain sizes around 1 μm. Their dielectric and energy storage behavior were studied. The NaNbO3-doped ceramics display drastically reduced temperature coefficient of capacitance (TCC) compared to the ceramics without doping. The samples with x = 0.02 exhibit high permittivity and excellent temperature stability between 67 °C and 380 °C, meeting the requirement of TCC ≤ ±15%. The energy storage density was greatly improved to 1.71 J/cm3as x = 0.03, showing excellent frequency stability from 0.5 Hz to 100 Hz, great temperature stability from 25 °C to 130 °C, and excellent fatigue resistance within 105fatigue cycles.