Enhanced Energy Storage using Ba(Zr0.2Ti0.8)O3–0.15(Ba0.7Ca0.3)TiO3 Ceramics with BaO–SrO–TiO2–Al2O3–SiO2–BaF2 Glass Addition
Enhanced Energy Storage using Ba(Zr0.2Ti0.8)O3–0.15(Ba0.7Ca0.3)TiO3 Ceramics with BaO–SrO–TiO2–Al2O3–SiO2–BaF2 Glass Addition
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DOI：
10.1002/ente.201600713
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发表时间：
2017-08
影响因子：
3.8
通讯作者：
Wenfeng Liu;Wei Ping;Shengtao Li
中科院分区：
文献类型：
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作者：
Wenfeng Liu;Wei Ping;Shengtao Li
通过添加BaO-SrO-TiO2Al2O2SiO2BaF2玻璃改善了Ba(Zr0.2Ti0.8)O3–0.15(Ba0.7Ca0.3)TiO3ceramics，的微观结构和储能性能，在25 °C、1 kHz下的介电常数为3458，磁滞回线细长，最大极化为12.53 μC cm−2，剩余极化为4.05 μC cm−2。微观结构表征表明，随着玻璃浓度的增加，平均晶粒尺寸显著减小。宏观上，微晶玻璃表现为扩散相变，峰值介电常数降低，但在室温附近有一个相对较大的介电常数约为1000的宽峰。同时，玻璃改性陶瓷的电击穿强度(BDS)几乎是纯陶瓷的四倍。玻璃改性陶瓷(419.4 kJ m−3由介电常数与BDS的平方之积计算)和192.8 kJ m−3(由9.6 kV mm−1电场下磁滞回线积分计算)的储能性能明显优于纯陶瓷材料。
The addition of the glass BaO–SrO–TiO2–Al2O3–SiO2–BaF2was employed to improve the microstructures and energy storage properties of Ba(Zr0.2Ti0.8)O3–0.15(Ba0.7Ca0.3)TiO3ceramics, which exhibited a large dielectric constant of 3458 at 25 °C under 1 kHz, slim hysteresis loop with the maximum polarization of 12.53 μC cm−2, and a remnant polarization of 4.05 μC cm−2. Characterization of the microstructure indicated that the average grain size was reduced significantly with increasing glass concentration. Macroscopically the glass ceramics exhibited diffusion phase transition with reduced peak dielectric constant, but a broad peak with a relatively large dielectric constant of approximately 1000 near room temperature. Meanwhile the electrical breakdown strength (BDS) of the glass modified ceramics was nearly quadruple that of the pure ceramic. The energy storage performance of the glass‐modified ceramics (419.4 kJ m−3calculated from the product of dielectric constant and square of BDS and 192.8 kJ m−3from the integration of the hysteresis loop under an electric field of 9.6 kV mm−1) showed significant superiority to that of the pure ceramic material.