摘要
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BaTiO3-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BaTiO3/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BaTiO3-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.
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 themechanism of modified BaTiO3/polyimide composites are studied. The results show that copper on the surface of theBT 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/conduc-tive particles/polyimide. In addition, although some copper nano-particles are oxidized, the conductive performanceis reduced, but the modified BT/polyimide composite material also has the properties of the low loss and the high di-electric constant. This fully shows that this new type of two-phase composite material can achieve the goal of high di-electric and low loss.
出处
《电子科技》
2015年第3期154-157,共4页
Electronic Science and Technology
关键词
钛酸钡
铜纳米颗粒
复合材料
介电性质
barium titanate
copper nano-particles
composites
dielectric properties
