• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Fabrication and Dielectric Characterization of Advanced BaTio_3/Polyimide Nanocomposite Films with High Thermal Stability
【24h】

Fabrication and Dielectric Characterization of Advanced BaTio_3/Polyimide Nanocomposite Films with High Thermal Stability

机译：具有高热稳定性的高级BaTio_3 /聚酰亚胺纳米复合薄膜的制备和介电特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Barium titanate/polyimide (BaTiO_3/PI) nanocomposite films with high dielectric permittivity (20), high breakdown strength (67 MV m~(-1)), and high thermal stability are prepared by an in-situ polymerization process. A very thin polymer layer (about 5 nm) is coated on the surface of nanosized BaTiO_3 particles to form a core-shell-like structure, which can guarantee homogeneous dispersion of the BaTiO_3 particles in the PI matrix. It is confirmed that the core-shell-like structure originates from both the electrostatic attraction between the precursor poly(amic acid) (PAA) and the BaTiO_3 particles and the hydrogen bond interaction between PI and the BaTiO_3 particles. Such a structure also has some influence on the dielectric properties and breakdown strength of films. After casting and degassing of the sticky film, the dielectric permittivity of the nanocomposite film is close to or even higher than that of submicrocomposite films, which is attributed to the advanced interfacial structure between the BaTiO_3 and PI phases.
机译：通过原位聚合工艺制备了介电常数高（20），击穿强度高（67 MV m〜（-1）），热稳定性高的钛酸钡/聚酰亚胺（BaTiO_3 / PI）纳米复合薄膜。非常薄的聚合物层（约5 nm）被涂覆在纳米级BaTiO_3颗粒的表面上，形成核壳状结构，这可以确保BaTiO_3颗粒在PI基体中均匀分散。证实了核-壳状结构既源自前体聚（酰胺酸）（PAA）与BaTiO_3颗粒之间的静电引力，也源自PI与BaTiO_3颗粒之间的氢键相互作用。这种结构也对薄膜的介电性能和击穿强度有一些影响。在对粘性薄膜进行浇铸和脱气后，纳米复合薄膜的介电常数接近或什至高于亚微米复合薄膜的介电常数，这归因于BaTiO_3和PI相之间的界面结构先进。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号