Low temperature cofirable Ca[(Li_1/3Nb_2/3)_0.95Zr_0.15]O_3+未 microwave dielectric ceramic with ZnO-B₂O₃-SiO₂ frit

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• 作者：Mingzhe Hu^a ; ^b ; ^{mzhu74@hubu.edu.cn} ; Juan Xiong^b ; Haoshuang Gu^b ; Yihang Chen^a ; Yu Wang^a
• 关键词：ZBS frit ; Microwave dielectric properties ; Low temperature cofire sintering ; Addition
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：May, 2012
• 卷：38
• 期：4
• 页码：3175-3183
• 文件大小：1939 K

摘要

The sintering properties and microwave dielectric properties of Ca[(Li_1/3Nb_2/3)_1鈭?em>xZr_3x]O_3+未 (x = 0.05, abbreviated as CLNZ) ceramic doped with ZBS frit are investigated for LTCC applications. XRD patterns and SEM photographs show that dense and single perovskite phase ceramics can be obtained with ZBS doping content of less than 10 wt%, before the Ca₂Nb₂O₇ pyrochlore phase begins to segregates. The results show that ZBS vitreous phase stays at the grain boundary in the final sintered ceramics, suggesting it acts as liquid phase lubrication during sintering, and has effectively lowered the sintering temperature of CLNZ ceramics from 1170 掳C to 940 掳C. The preferred orientation of CLNZ solid solution varies from (1 2 1) plane to (1 0 1) plane as ZBS content and sintering temperature increase. The optimal microwave dielectric properties of 蓻_r = 32.0, Q_f = 6.64 THz and 蟿_f = 鈭?7.1 ppm/掳C can be obtained in 15 wt%ZBS doped CLNZ ceramic when sintered at 940 掳C for 4 h. The Ag-cofiring experiment clearly shows that no chemical reaction takes place between Ag and the ZBS-doped CLNZ ceramic, indicating its great potential applications in LTCC field.