在本文中，主要是研究高介電常數和高密度的（Ba,Ca）（Ti,Zr）O3（BCTZ）陶瓷與銅電極共燒並使用燒結助劑對材料有何影響。在SiO2和Li2CO3主要是在用來降低燒結溫度。當添加的SiO2和Li2CO3量都達到最佳化時，以得到最佳的介電特性和均勻晶粒分佈。然而，我們發現添加過量的Li2CO3會產生第二相，而導致BCTZ的介電常數和絕緣電阻下降，並使BCTZ的介電損耗增加。從我們的研究得知，可以藉由高解析度的穿透式電子顯微鏡和EDS可以檢測出二次相（Ba1.55Ca0.45Si1O4）的產生。從本實驗透過在還原氣氛下燒結溫度為1050℃並持溫2小時與銅電極共燒， 並在(Ba,Ca)(Ti,Zr)O3樣品中可量測到介電常數為9700，而介電損耗低至23×10-4，以及高達5×1010Ω絕緣電阻的特性。

In this paper, the high dielectric constant and the high density of (Ba,Ca)(Ti,Zr)O3(BCTZ) ceramic using the sintering aid for co-firing with copper electrode was investigated. The SiO2 and Li2CO3 were used to reduce the sintering temperature below 1050℃ for 2hr in the reducing atmosphere due to the promote liquid-phase sintering. The additional amount of SiO2 and Li2CO3 have been optimized to achieve optimum dielectric characteristics and uniform grain size distribution. However, it was found that the excess amount of Li2CO3 resulted from the secondary phase, which led to the dielectric constant and insulation resistance of the BCTZ were decreased and the dielectric loss of BCTZ was increased. It was demonstrated that the secondary phase (Ba1.55Ca0.45Si1O4) was examined by High-Resolution Transmission Electron Microscopy and energy-dispersive spectrometry (HRTEM-EDS). The high dielectric constant up to 9700, dielectric loss of 23×10-4 and high insulation resistance up to 5×1010 of (Ba,Ca)(Ti,Zr)O3 of the specimen were sintered at 1050℃ for 2hr with copper electrode in the reducing atmosphere.

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