›› 2015, Vol. 28 ›› Issue (3): 154-.

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  1. (西安电子科技大学 先进材料与纳米科技学院,陕西 西安 710071)
  • 出版日期:2015-03-15 发布日期:2015-03-12
  • 作者简介:潘志龙(1988—),男,硕士研究生。研究方向:电子材料封装。E-mail:panzhilong_520@163.com

Surface Modification of BaTiO3 and Dielectric Properties of Modified BaTiO3/Polyimide Composites

PAN Zhilong   

  1. (School of Advanced Material and Nanometer Technology,Xidian University,Xi'an 710071,China)
  • Online:2015-03-15 Published:2015-03-12


采用化学还原法在直径100 nm的钛酸钡表面沉积直径约5~20 nm的铜纳米颗粒,分析了BaTiO3-聚酰亚胺复合材料的介电性能和作用机理。研究结果表明:铜纳米颗粒通过化学键与钛酸钡表面的晶体结构结合在一起,与聚酰亚胺组合成两相复合材料,这有别于BaTiO3/导电粒子/聚酰亚胺三相复合材料。另外,虽然铜纳米颗粒有部分被氧化,导电性能降低,但改性后的BaTiO3-聚酰亚胺的复合材料还是具有低损耗、高介电的性能,充分说明了这种新型的两相复合材料能够实现高介电、低损耗的目标。

关键词: 钛酸钡, 铜纳米颗粒, 复合材料, 介电性质


The chemical reduction method is used in this paper to deposit copper nano-particles (about 5~20 nm) on the surface of the barium titanate (BT) of a diameter of 100 nm.Then the dielectric properties and the mechanism of modified BaTiO3/polyimide composites are studied.The results show that copper on the surface of the BT nano-particles by chemical bonds,that is,the copper crystal structure is linked with the BT crystal structure.So this composite is a two-phase composite material different from the three-phase composite materials of BT/conductive particles/polyimide.In addition,although some copper nano-particles are oxidized,the conductive performance is reduced,but the modified BT/polyimide composite material also has the properties of the low loss and the high dielectric constant.This fully shows that this new type of two-phase composite material can achieve the goal of high dielectric and low loss.

Key words: barium titanate;copper nano particles;composites;dielectric properties


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