xLaAlO3-(1-x)CaTiO3添加燒結促進劑 PBS、B2O3、CuO之微結構與介電特性研究

Investigation for microstructure and microwave dielectric properties of xLaAlO3-(1-x)CaTiO3 ceramics sintering additive PBS、B2O3、CuO

王泓翔(Hung-Hsiang Wang)

指導教授 ： 林水木 ； 翁敏航 ； 廖慶聰

崑山科技大學/工程學院/機械工程研究所/碩士(2006年)

https://doi.org/10.6828/KSU.2006.00065

摘要

在本論文，將討論x LaAlO3-(1-x)CaTiO3添加燒結促進劑 PBS、B2O3、CuO之微結構與其微波介電特性。由於LaAlO3介電陶瓷材料之τf為負值（τf = -44 ppm/℃)，我們選擇添加CaTiO3(τf = +800 ppm/℃)做為溫度飄移之補償。藉由添加不同比例之燒結促進劑 PBS玻璃、B2O3、CuO，探討產生的液相對其微結構與微波特性之影響。實驗結果顯示，0.95LaAlO3-0.05CaTiO3添加 0.5wt% B2O3+0.5wt% CuO可有效降低燒結溫度到1300℃時，並具有最佳的介電特性 εr ~ 21、Q×f 值~22500（GHz）、τf~ -3（ppm/℃）。

關鍵字

液相燒結 ； 燒結促進劑 ； 鋁酸鑭

並列摘要

In this study, the microstructures and microwave properties of x LaAlO3-(1-x) CaTiO3 added with different sintering aids such as PBS glass、B2O3and CuO were investigated. Since LaAlO3 dielectric ceramic has negative τf value ( - 44 ppm/℃), the CaTiO3 ceramic with positive τf value (+800ppm/℃) is combined to adjust the τf value to zero. By adding different sintering aids, the effect of liquid phase on the microstructures and microwave properties of LaAlO3-CaTiO3 system were investigated. The experimental results show that 0.95 LaAlO3-0.05 CaTiO3 ceramic added with 0.5wt% B2O3+0.5wt% CuO can efficiently reduce the sintering temperature from 1650℃ to 1300℃, and has the useful microwave properties, including : εr~21、Q×f ~22500（GHz）、τf ~ -3 （ppm/℃）.

並列關鍵字

Liquid Phase Sintering ； Sintering Additive ； LaAlO3

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