聚醯亞胺與鈦酸鋇奈米複合薄膜之製備及其介電特性之研究

Preparation and the Dielectric Properties of Polyimide/BaTiO3 Nanocomposite Films

蔡立瑜(Li-Yu Tsai)

指導教授 ： 王宏文

中原大學/理學院/化學研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300210

摘要

本實驗採用以水熱法(Hydrothemal method)製備出奈米級的鈦酸鋇粉體，並利用直接混合法(Mixing method)、溶膠-凝膠法(Sol-gel method)、添加分散劑等三種製備方式，將奈米級鈦酸鋇粉體分散在聚醯亞胺的基材中，以製備出聚醯亞胺/鈦酸鋇複合薄膜。在本研究中，將探討利用不同單體所製備的聚醯亞胺與添加不同比例的鈦酸鋇粉體對介電性質的影響。研究結果顯示，以BSAA系列之複合薄膜的性質較為顯著。當增加鈦酸鋇粉體的比例時，此複合材料的耐熱性質明顯的降低，且分散效果較為明顯，及介電特性也相對地提升。
本實驗所得之最佳方法及特性為：以方法III BSAA系列之聚醯亞胺/鈦酸鋇複合薄膜，其介電常數值由4.1提升至5.3左右；介電損失大約在0.01~0.03左右。

關鍵字

聚醯亞胺 ； 鈦酸鋇 ； 介電特性

並列摘要

Reactive powder of nano-BaTiO3 powder is prepared by the hydrothermal method.Two serises of the monoers of polyimide have been used for the prepartion of polyimide/BaTiO3 composite films. Polyimide/BaTiO3 composite films were obtained by three methods: mixing method, sol-gel mothed and mixing with dispersant. Dielectric constant and morphology of polyimide/BaTiO3 composite films were investigated as a fuction of the BaTiO3 powder content. TEM show that mixing with disperant is an effective way to synthesize polyimide/BaTiO3 nano-dispersed composites. We have found that the thermal stability of composite films decrease and dielectric constants increase slightly as the BaTiO3 powder content increases. However, dielectric constant varies when BaTiO3 particles are not well dispersed. The best properties obtained is derived from the serises of the BSAA of polyimide/BaTiO3 composite films (III). Their all fabricated polyimide/BaTiO3 composites films exhibit low dielectric loss (<0.05) dielectric constants increase from 3.6 to 5.3 and dielectric losses are mostly less than 0.03.

並列關鍵字

Dielectric properties ； BaTiO3 ； Polyimide

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