CaCu3Ti4O12具有很高及對溫度變化率低(100-400K)的介電常數，此性質極符合電子元件的實際應用規格如X5R。但其介電損失過大，使其無法完全符合應用規格。本研究為探討CaCu3Ti4O12的高介電來源和添加氟化鋰對CaCu3Ti4O12的影響，希望能找出使產品有較好的性質及可靠度之製程和材料配方。

CaCu3Ti4O12 which exhibits a large dielectric constant and the dielectric constant is weakly varying in the temperature range 100~400K. This property is conformed to the electronic component’s application specification, for example X5R.But the large tangent loss makes it can not conform to the application specification. This study is to investigate the origin of high permittivity in CaCu3Ti4O12 and the effects of LiF addition to CaCu3Ti4O12. Through these investigations a large resistivity and process in preparing for CaCu3Ti4O12 could be suggested.

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