杨永志, 姜芃, 晁巾翔, 李雨凡, 李永明, 李玉超. 模板法构筑三维钛酸钡/聚乙烯醇-氮化硼柔性电介质材料的介电储能特性[J]. 高电压技术, 2024, 50(6): 2382-2389. DOI: 10.13336/j.1003-6520.hve.20230903
引用本文: 杨永志, 姜芃, 晁巾翔, 李雨凡, 李永明, 李玉超. 模板法构筑三维钛酸钡/聚乙烯醇-氮化硼柔性电介质材料的介电储能特性[J]. 高电压技术, 2024, 50(6): 2382-2389. DOI: 10.13336/j.1003-6520.hve.20230903
YANG Yongzhi, JIANG Peng, CHAO Jinxiang, LI Yufan, LI Yongming, LI Yuchao. Investigation of Flexible Dielectric Composites Based on Three-dimensional Barium Titanate /Polyvinyl Alcohol-Boron Nitride Constructed by Template Method[J]. High Voltage Engineering, 2024, 50(6): 2382-2389. DOI: 10.13336/j.1003-6520.hve.20230903
Citation: YANG Yongzhi, JIANG Peng, CHAO Jinxiang, LI Yufan, LI Yongming, LI Yuchao. Investigation of Flexible Dielectric Composites Based on Three-dimensional Barium Titanate /Polyvinyl Alcohol-Boron Nitride Constructed by Template Method[J]. High Voltage Engineering, 2024, 50(6): 2382-2389. DOI: 10.13336/j.1003-6520.hve.20230903

模板法构筑三维钛酸钡/聚乙烯醇-氮化硼柔性电介质材料的介电储能特性

Investigation of Flexible Dielectric Composites Based on Three-dimensional Barium Titanate /Polyvinyl Alcohol-Boron Nitride Constructed by Template Method

  • 摘要: 为研究三维钛酸钡(3DBT)网络结构和BN含量对复合体系介电储能特性的影响规律,以无尘纸为模板,溶胶凝胶法制备3DBT陶瓷网络;然后将含有不同比例氮化硼(BN)纳米片/聚乙烯醇溶液(PVA-BN)反向引入到3DBT网络中,制得了3DBT/PVA-BN复合电介质材料。研究表明,反向引入PVA溶液能够实现其对3DBT的有效包埋,赋予3DBT良好的柔韧性。当PVA达到饱和时,3DBT网络的质量分数约为27%(体积分数6.9%)。其中,3DBT/PVA-0.50%BN复合电介质材料表现出综合的介电储能特性,其介电常数和储能密度为18.1(1 kHz)和1.24 J/cm3(90 kV/mm下),分别是传统方法制备27% nano-BT/PVA复合材料的1.74和3.54倍。此外,获得的3DBT/PVA-BN介电材料具有更好的热稳定性,表现出良好的应用前景。

     

    Abstract: Three-dimensional barium titanate (3DBT) ceramic network was prepared by sol-gel method using cleanroom wipers as template. Different contents of boron nitride (BN) nanosheets/polyvinyl alcohol (PVA-BN) solution were reversely introduced into the 3DBT network, resulting in flexible 3DBT/PVA-BN composite dielectric film. The study shows that PVA solution can be effectively embedded into 3DBT framework via reverse infiltration, endowing the material with excellent flexibility. The mass fraction of 3DBT in a saturated 3DBT/PVA-BN composite is about 27% (volume fraction 6.9%). What's more, the 3DBT/PVA-0.50%BN system exhibits comprehensive dielectric and energy storage performances. The dielectric constant and energy storage density of 3DBT/PVA-0.50%BN composites are 18.1 (at 1 kHz) of 1.24 J/cm3 (at 90 kV/mm), being 1.74 and 3.54 times higher than those of traditional 27% nano-BT/PVA composite, respectively. In addition, the obtained 3DBT/PVA-BN dielectric film possesses better thermal stability, implying good application prospects.

     

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